# What is CVE-2021-45105?

> CVE-2021-45105 is a medium-severity flaw (CVSS 5.9) in Log4j from Apache, published on 18 December 2021. It is not on the list of flaws known to be exploited today. The latest forecast puts its chance of use in the next 30 days at over 99%. If you run an affected version, plan in the vendor’s fix.

Canonical page: https://www.precursorintelligence.com/what-is/cve-2021-45105

## At a glance

- **Verdict:** Fix this soon. Not confirmed as exploited yet, but serious or likely enough that it should not wait for a quiet month.
- **Precursor Intelligence risk score:** 70 out of 100 (High); action: Patch now. Kept up to date as the evidence changes.
- **Severity:** Medium (CVSS 5.9 out of 10)
- **Known to be exploited:** No, not on the list of flaws known to be exploited today
- **Chance of use in the next 30 days:** over 99% (latest exploit-likelihood forecast)
- **Published:** 18 December 2021
- **Record last updated:** 6 October 2022
- **Main product:** Log4j from Apache
- **Affected products:** 121

## What is CVE-2021-45105? In plain terms

It can be attacked from anywhere on the internet without logging in, and nobody has to click anything. If it works, the attacker can take it offline.

### The official description

Apache Log4j2 versions 2.0-alpha1 through 2.16.0 (excluding 2.12.3 and 2.3.1) did not protect from uncontrolled recursion from self-referential lookups. This allows an attacker with control over Thread Context Map data to cause a denial of service when a crafted string is interpreted. This issue was fixed in Log4j 2.17.0, 2.12.3, and 2.3.1.

### What kind of flaw is it?

- CWE-20: Improper Input Validation
- CWE-674: Uncontrolled Recursion

### How an attack on it works

- Where an attacker can be: Anywhere on the internet
- How hard it is to pull off: Hard: conditions must line up
- Login needed first: No login needed
- Does someone have to click: No, nobody has to do anything
- What an attacker gets: Can take it offline

Severity vector: `CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H`

## Is CVE-2021-45105 being exploited? Not that we know of

It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at over 99%. That can change at any time, which is why we keep watching.

Exploit likelihood over the last 7 days: >99%, >99%, >99%, >99%, >99%, >99%, >99%.

### Timeline

- 18 December 2021: Published
- 6 October 2022: Record last updated
- 19 November 2025: Exploit likelihood jumped
- 22 November 2025: Exploit likelihood fell

### How Precursor Intelligence ranks it

CVE-2021-45105 scores **70 out of 100 (High)**, with the action "Patch now".

Every published flaw gets a risk score from 0 to 100, kept up to date as the evidence changes. Four things go into the score, from the one that counts most to the ones that count less:

- Evidence it is being exploited: biggest factor
- How severe it is: strong factor
- How widely exposed it is: smaller factor
- Threat activity around it: smaller factor

85 and above is Critical. Anything confirmed as exploited is always marked for an emergency patch, whatever its score. When this flaw matches software you track, it lands in your list with its score and the reasons behind it.

## Who is affected by CVE-2021-45105?

The published record lists 121 products. Versions are as published: "2.0 to before 2.3.1" means from 2.0 up to, but not including, 2.3.1.

- [Log4j](https://www.precursorintelligence.com/product/apache/log4j) by [Apache](https://www.precursorintelligence.com/vendors/apache) (Application): 2.0 to before 2.3.1, 2.4 to before 2.12.3, 2.13.0 to 2.16.0
- [Retail Service Backbone](https://www.precursorintelligence.com/product/oracle/retail_service_backbone) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 14.1.3, 14.1.3.2, 15.0.3.1, 16.0.1 to 16.0.3, 19.0.0, 19.0.1, 19.0.1.0
- [Retail Eftlink](https://www.precursorintelligence.com/product/oracle/retail_eftlink) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 16.0.3, 17.0.2, 18.0.1, 19.0.1, 20.0.1, 21.0.0
- [Retail Store Inventory Management](https://www.precursorintelligence.com/product/oracle/retail_store_inventory_management) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 14.0.4.13, 14.1.3.5, 14.1.3.14, 15.0.3.3, 15.0.3.8, 16.0.3.7
- [Primavera Gateway](https://www.precursorintelligence.com/product/oracle/primavera_gateway) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 17.12.0 to 17.12.11, 18.8.0 to 18.8.13, 19.12.0 to 19.12.12, 20.12.0 to 20.12.7, 21.12.0
- [Retail Financial Integration](https://www.precursorintelligence.com/product/oracle/retail_financial_integration) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 14.1.3.2, 15.0.3.1, 16.0.1 to 16.0.3, 19.0.0, 19.0.1
- [Retail Integration Bus](https://www.precursorintelligence.com/product/oracle/retail_integration_bus) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 14.1.3, 14.1.3.2, 15.0.3.1, 16.0.1 to 16.0.3, 19.0.0 to 19.0.1.0
- [Retail Price Management](https://www.precursorintelligence.com/product/oracle/retail_price_management) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 13.2, 14.0.4, 14.1.3.0, 15.0.3.0, 16.0.3.0
- [Flexcube Universal Banking](https://www.precursorintelligence.com/product/oracle/flexcube_universal_banking) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 11.83.3, 12.1.0 to 12.4, 14.0.0 to 14.3.0, 14.5
- [Primavera Unifier](https://www.precursorintelligence.com/product/oracle/primavera_unifier) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 18.8, 19.12, 20.12, 21.12
- [Utilities Framework](https://www.precursorintelligence.com/product/oracle/utilities_framework) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 4.3.0.1.0 to 4.3.0.6.0, 4.4.0.0.0, 4.4.0.2.0, 4.4.0.3.0
- [Banking Platform](https://www.precursorintelligence.com/product/oracle/banking_platform) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 2.6.2, 2.7.1, 2.12.0
- [Communications Unified Inventory Management](https://www.precursorintelligence.com/product/oracle/communications_unified_inventory_management) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 7.3.5, 7.4.1, 7.4.2
- [Financial Services Model Management and Governance](https://www.precursorintelligence.com/product/oracle/financial_services_model_management_and_governance) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 8.0.8.0.0, 8.1.0.0.0, 8.1.1.0.0
- [Health Sciences Inform](https://www.precursorintelligence.com/product/oracle/health_sciences_inform) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 6.2.1.1, 6.3.2.1, 7.0.0.0
- [Instantis Enterprisetrack](https://www.precursorintelligence.com/product/oracle/instantis_enterprisetrack) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 17.1, 17.2, 17.3
- [Insurance Insbridge Rating and Underwriting](https://www.precursorintelligence.com/product/oracle/insurance_insbridge_rating_and_underwriting) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 5.2.0, 5.4 to 5.6.0.0, 5.6.1.0
- [Primavera P6 Enterprise Project Portfolio Management](https://www.precursorintelligence.com/product/oracle/primavera_p6_enterprise_project_portfolio_management) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 19.12.0.0 to 19.12.18.0, 20.12.0.0 to 20.12.12.0, 21.12.0.0
- [Retail Order Broker](https://www.precursorintelligence.com/product/oracle/retail_order_broker) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 16.0, 18.0, 19.1
- [Retail Predictive Application Server](https://www.precursorintelligence.com/product/oracle/retail_predictive_application_server) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 14.1.3.46, 15.0.3.115, 16.0.3.240
- [Weblogic Server](https://www.precursorintelligence.com/product/oracle/weblogic_server) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 12.2.1.3.0, 12.2.1.4.0, 14.1.1.0.0
- [Banking Enterprise Default Management](https://www.precursorintelligence.com/product/oracle/banking_enterprise_default_management) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 2.7.1, 2.12.0
- [Communications Billing and Revenue Management](https://www.precursorintelligence.com/product/oracle/communications_billing_and_revenue_management) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 12.0.0.4, 12.0.0.5
- [Communications Cloud Native Core Network Repository Function](https://www.precursorintelligence.com/product/oracle/communications_cloud_native_core_network_repository_function) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 1.15.0, 1.15.1
- [Communications Convergence](https://www.precursorintelligence.com/product/oracle/communications_convergence) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 3.0.2.2.0, 3.0.3.0
- [Communications Convergent Charging Controller](https://www.precursorintelligence.com/product/oracle/communications_convergent_charging_controller) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 6.0.1.0.0, 12.0.1.0.0 to 12.0.4.0.0
- [Communications Interactive Session Recorder](https://www.precursorintelligence.com/product/oracle/communications_interactive_session_recorder) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 6.3, 6.4
- [Communications Network Charging and Control](https://www.precursorintelligence.com/product/oracle/communications_network_charging_and_control) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 6.0.1.0.0, 12.0.1.0.0 to 12.0.4.0.0
- [Communications Pricing Design Center](https://www.precursorintelligence.com/product/oracle/communications_pricing_design_center) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 12.0.0.4, 12.0.0.5
- [Communications Webrtc Session Controller](https://www.precursorintelligence.com/product/oracle/communications_webrtc_session_controller) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 7.2.0.0, 7.2.1
- [Data Integrator](https://www.precursorintelligence.com/product/oracle/data_integrator) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 12.2.1.3.0, 12.2.1.4.0
- [Debian Linux](https://www.precursorintelligence.com/product/debian/debian_linux) by [Debian](https://www.precursorintelligence.com/vendors/debian) (Operating system): 10.0, 11.0
- [Enterprise Manager Base Platform](https://www.precursorintelligence.com/product/oracle/enterprise_manager_base_platform) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 13.4.0.0, 13.5.0.0
- [Enterprise Manager for Peoplesoft](https://www.precursorintelligence.com/product/oracle/enterprise_manager_for_peoplesoft) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 13.4.1.1, 13.5.1.1
- [Health Sciences Empirica Signal](https://www.precursorintelligence.com/product/oracle/health_sciences_empirica_signal) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 9.1.0.6, 9.2.0.0
- [Healthcare Translational Research](https://www.precursorintelligence.com/product/oracle/healthcare_translational_research) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 4.1.0, 4.1.1
- [Hospitality Suite8](https://www.precursorintelligence.com/product/oracle/hospitality_suite8) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 8.13.0, 8.14.0
- [Identity Management Suite](https://www.precursorintelligence.com/product/oracle/identity_management_suite) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 12.2.1.3.0, 12.2.1.4.0
- [Managed File Transfer](https://www.precursorintelligence.com/product/oracle/managed_file_transfer) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 12.2.1.3.0, 12.2.1.4.0
- [Payment Interface](https://www.precursorintelligence.com/product/oracle/payment_interface) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 19.1, 20.3
- [Peoplesoft Enterprise Peopletools](https://www.precursorintelligence.com/product/oracle/peoplesoft_enterprise_peopletools) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 8.58, 8.59
- [Retail Customer Insights](https://www.precursorintelligence.com/product/oracle/retail_customer_insights) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 15.0.2, 16.0.2
- [Retail Data Extractor for Merchandising](https://www.precursorintelligence.com/product/oracle/retail_data_extractor_for_merchandising) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 15.0.2, 16.0.2
- [Retail Invoice Matching](https://www.precursorintelligence.com/product/oracle/retail_invoice_matching) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 15.0.3, 16.0.3
- [Retail Merchandising System](https://www.precursorintelligence.com/product/oracle/retail_merchandising_system) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 16.0.3, 19.0.1
- [Webcenter Portal](https://www.precursorintelligence.com/product/oracle/webcenter_portal) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 12.2.1.3.0, 12.2.1.4.0
- [Webcenter Sites](https://www.precursorintelligence.com/product/oracle/webcenter_sites) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 12.2.1.3.0, 12.2.1.4.0
- [6bk1602-0aa12-0tp0](https://www.precursorintelligence.com/product/sonicwall/6bk1602-0aa12-0tp0) by [SonicWall](https://www.precursorintelligence.com/vendors/sonicwall) (Hardware): version not specified
- [6bk1602-0aa12-0tp0 Firmware](https://www.precursorintelligence.com/product/sonicwall/6bk1602-0aa12-0tp0_firmware) by [SonicWall](https://www.precursorintelligence.com/vendors/sonicwall) (Operating system): before 2.7.0
- [6bk1602-0aa22-0tp0](https://www.precursorintelligence.com/product/sonicwall/6bk1602-0aa22-0tp0) by [SonicWall](https://www.precursorintelligence.com/vendors/sonicwall) (Hardware): version not specified
- [6bk1602-0aa22-0tp0 Firmware](https://www.precursorintelligence.com/product/sonicwall/6bk1602-0aa22-0tp0_firmware) by [SonicWall](https://www.precursorintelligence.com/vendors/sonicwall) (Operating system): before 2.7.0
- [6bk1602-0aa32-0tp0](https://www.precursorintelligence.com/product/sonicwall/6bk1602-0aa32-0tp0) by [SonicWall](https://www.precursorintelligence.com/vendors/sonicwall) (Hardware): version not specified
- [6bk1602-0aa32-0tp0 Firmware](https://www.precursorintelligence.com/product/sonicwall/6bk1602-0aa32-0tp0_firmware) by [SonicWall](https://www.precursorintelligence.com/vendors/sonicwall) (Operating system): before 2.7.0
- [6bk1602-0aa42-0tp0](https://www.precursorintelligence.com/product/sonicwall/6bk1602-0aa42-0tp0) by [SonicWall](https://www.precursorintelligence.com/vendors/sonicwall) (Hardware): version not specified
- [6bk1602-0aa42-0tp0 Firmware](https://www.precursorintelligence.com/product/sonicwall/6bk1602-0aa42-0tp0_firmware) by [SonicWall](https://www.precursorintelligence.com/vendors/sonicwall) (Operating system): before 2.7.0
- [6bk1602-0aa52-0tp0](https://www.precursorintelligence.com/product/sonicwall/6bk1602-0aa52-0tp0) by [SonicWall](https://www.precursorintelligence.com/vendors/sonicwall) (Hardware): version not specified
- [6bk1602-0aa52-0tp0 Firmware](https://www.precursorintelligence.com/product/sonicwall/6bk1602-0aa52-0tp0_firmware) by [SonicWall](https://www.precursorintelligence.com/vendors/sonicwall) (Operating system): before 2.7.0
- [Agile Engineering Data Management](https://www.precursorintelligence.com/product/oracle/agile_engineering_data_management) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 6.2.1.0
- [Agile Plm](https://www.precursorintelligence.com/product/oracle/agile_plm) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 9.3.6
- [Agile Plm Mcad Connector](https://www.precursorintelligence.com/product/oracle/agile_plm_mcad_connector) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 3.6
- [Autovue for Agile Product Lifecycle Management](https://www.precursorintelligence.com/product/oracle/autovue_for_agile_product_lifecycle_management) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 21.0.2
- [Banking Deposits and Lines of Credit Servicing](https://www.precursorintelligence.com/product/oracle/banking_deposits_and_lines_of_credit_servicing) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 2.12.0
- [Banking Loans Servicing](https://www.precursorintelligence.com/product/oracle/banking_loans_servicing) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 2.12.0
- [Banking Party Management](https://www.precursorintelligence.com/product/oracle/banking_party_management) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 2.7.0
- [Banking Payments](https://www.precursorintelligence.com/product/oracle/banking_payments) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 14.5
- [Banking Trade Finance](https://www.precursorintelligence.com/product/oracle/banking_trade_finance) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 14.5
- [Banking Treasury Management](https://www.precursorintelligence.com/product/oracle/banking_treasury_management) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 14.5
- [Business Intelligence](https://www.precursorintelligence.com/product/oracle/business_intelligence) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 5.5.0.0.0
- [Cloud Manager](https://www.precursorintelligence.com/product/netapp/cloud_manager) by [Netapp](https://www.precursorintelligence.com/vendors/netapp) (Application): version not specified
- [Communications Asap](https://www.precursorintelligence.com/product/oracle/communications_asap) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 7.3
- [Communications Cloud Native Core Console](https://www.precursorintelligence.com/product/oracle/communications_cloud_native_core_console) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 1.9.0
- [Communications Cloud Native Core Network Function Cloud Native Environment](https://www.precursorintelligence.com/product/oracle/communications_cloud_native_core_network_function_cloud_native_environment) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 1.10.0
- [Communications Cloud Native Core Network Slice Selection Function](https://www.precursorintelligence.com/product/oracle/communications_cloud_native_core_network_slice_selection_function) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 1.8.0
- [Communications Cloud Native Core Policy](https://www.precursorintelligence.com/product/oracle/communications_cloud_native_core_policy) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 1.15.0
- [Communications Cloud Native Core Security Edge Protection Proxy](https://www.precursorintelligence.com/product/oracle/communications_cloud_native_core_security_edge_protection_proxy) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 1.7.0
- [Communications Cloud Native Core Service Communication Proxy](https://www.precursorintelligence.com/product/oracle/communications_cloud_native_core_service_communication_proxy) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 1.15.0
- [Communications Cloud Native Core Unified Data Repository](https://www.precursorintelligence.com/product/oracle/communications_cloud_native_core_unified_data_repository) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 1.15.0
- [Communications Diameter Signaling Router](https://www.precursorintelligence.com/product/oracle/communications_diameter_signaling_router) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 8.3.0.0 to 8.5.1.0
- [Communications Eagle Element Management System](https://www.precursorintelligence.com/product/oracle/communications_eagle_element_management_system) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 46.6
- [Communications Eagle FTP Table Base Retrieval](https://www.precursorintelligence.com/product/oracle/communications_eagle_ftp_table_base_retrieval) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 4.5
- [Communications Element Manager](https://www.precursorintelligence.com/product/oracle/communications_element_manager) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): before 9.0
- [Communications Evolved Communications Application Server](https://www.precursorintelligence.com/product/oracle/communications_evolved_communications_application_server) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 7.1
- [Communications IP Service Activator](https://www.precursorintelligence.com/product/oracle/communications_ip_service_activator) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 7.4.0
- [Communications Messaging Server](https://www.precursorintelligence.com/product/oracle/communications_messaging_server) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 8.1
- [Communications Network Integrity](https://www.precursorintelligence.com/product/oracle/communications_network_integrity) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 7.3.6
- [Communications Performance Intelligence Center](https://www.precursorintelligence.com/product/oracle/communications_performance_intelligence_center) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 10.4.0.3
- [Communications Service Broker](https://www.precursorintelligence.com/product/oracle/communications_service_broker) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 6.2
- [Communications Services Gatekeeper](https://www.precursorintelligence.com/product/oracle/communications_services_gatekeeper) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 7.0
- [Communications Session Report Manager](https://www.precursorintelligence.com/product/oracle/communications_session_report_manager) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): before 9.0
- [Communications Session Route Manager](https://www.precursorintelligence.com/product/oracle/communications_session_route_manager) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): before 9.0
- [Communications User Data Repository](https://www.precursorintelligence.com/product/oracle/communications_user_data_repository) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 12.4
- [E-Business Suite](https://www.precursorintelligence.com/product/oracle/e-business_suite) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 12.2
- [Email Security](https://www.precursorintelligence.com/product/sonicwall/email_security) by [SonicWall](https://www.precursorintelligence.com/vendors/sonicwall) (Application): up to 10.0.12
- [Enterprise Manager Ops Center](https://www.precursorintelligence.com/product/oracle/enterprise_manager_ops_center) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 12.4.0.0
- [Financial Services Analytical Applications Infrastructure](https://www.precursorintelligence.com/product/oracle/financial_services_analytical_applications_infrastructure) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 8.0.7 to 8.1.1
- [Health Sciences Information Manager](https://www.precursorintelligence.com/product/oracle/health_sciences_information_manager) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 3.0.1 to 3.0.4
- [Healthcare Data Repository](https://www.precursorintelligence.com/product/oracle/healthcare_data_repository) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 8.1.1
- [Healthcare Foundation](https://www.precursorintelligence.com/product/oracle/healthcare_foundation) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 7.3.0.1 to 7.3.0.4
- [Healthcare Master Person Index](https://www.precursorintelligence.com/product/oracle/healthcare_master_person_index) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 5.0.1
- [Hospitality Token Proxy Service](https://www.precursorintelligence.com/product/oracle/hospitality_token_proxy_service) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 19.2
- Hyperion Bi+ by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): before 11.2.8.0
- [Hyperion Data Relationship Management](https://www.precursorintelligence.com/product/oracle/hyperion_data_relationship_management) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): before 11.2.8.0
- [Hyperion Infrastructure Technology](https://www.precursorintelligence.com/product/oracle/hyperion_infrastructure_technology) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): before 11.2.8.0
- [Hyperion Planning](https://www.precursorintelligence.com/product/oracle/hyperion_planning) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): before 11.2.8.0
- [Hyperion Profitability and Cost Management](https://www.precursorintelligence.com/product/oracle/hyperion_profitability_and_cost_management) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): before 11.2.8.0
- [Hyperion Tax Provision](https://www.precursorintelligence.com/product/oracle/hyperion_tax_provision) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): before 11.2.8.0
- [Identity Manager Connector](https://www.precursorintelligence.com/product/oracle/identity_manager_connector) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 9.1.0
- [Insurance Data Gateway](https://www.precursorintelligence.com/product/oracle/insurance_data_gateway) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 1.0.1
- [Jdeveloper](https://www.precursorintelligence.com/product/oracle/jdeveloper) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 12.2.1.4.0
- [Management Cloud Engine](https://www.precursorintelligence.com/product/oracle/management_cloud_engine) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 1.5.0
- [Mysql Enterprise Monitor](https://www.precursorintelligence.com/product/oracle/mysql_enterprise_monitor) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): up to 8.0.29
- [Network Security Manager](https://www.precursorintelligence.com/product/sonicwall/network_security_manager) by [SonicWall](https://www.precursorintelligence.com/vendors/sonicwall) (Application): 2.0 to before 3.0
- [Retail Back Office](https://www.precursorintelligence.com/product/oracle/retail_back_office) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 14.1
- [Retail Central Office](https://www.precursorintelligence.com/product/oracle/retail_central_office) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 14.1
- [Retail Order Management System](https://www.precursorintelligence.com/product/oracle/retail_order_management_system) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 19.5
- [Retail Point-of-Service](https://www.precursorintelligence.com/product/oracle/retail_point-of-service) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 14.1
- [Retail Returns Management](https://www.precursorintelligence.com/product/oracle/retail_returns_management) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 14.1
- [Siebel UI Framework](https://www.precursorintelligence.com/product/oracle/siebel_ui_framework) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): up to 21.12
- [SQL Developer](https://www.precursorintelligence.com/product/oracle/sql_developer) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): before 21.4.2
- [Taleo Platform](https://www.precursorintelligence.com/product/oracle/taleo_platform) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): before 22.1
- [Web Application Firewall](https://www.precursorintelligence.com/product/sonicwall/web_application_firewall) by [SonicWall](https://www.precursorintelligence.com/vendors/sonicwall) (Application): 3.0.0 to before 3.1.0

## How do I fix CVE-2021-45105?

1. **Check whether you run it.** Compare your versions with the affected products above. Not sure what you run? Precursor Intelligence can work it out from your public website, or you can pick it from a list.
2. **Apply the vendor’s fix.** Install the update named in the vendor’s advisory. We’ve put the advisories and patch notes first in the list.
3. **If you can’t patch today.** Follow any mitigation the vendor publishes, and limit who can reach the affected system from the internet until the update is in.
4. **Keep an eye on it.** Track the product and we tell you as soon as we spot this flaw on the list of exploited flaws, or a jump in its exploit likelihood.

### References

- [oracle.com](https://www.oracle.com/security-alerts/cpuapr2022.html) (Patch, Third-party advisory)
- [oracle.com](https://www.oracle.com/security-alerts/cpujan2022.html) (Patch, Third-party advisory)
- [logging.apache.org](https://logging.apache.org/log4j/2.x/security.html) (Release notes, Vendor advisory)
- [openwall.com](http://www.openwall.com/lists/oss-security/2021/12/19/1) (Mailing list, Mitigation, Third-party advisory)
- [cert-portal.siemens.com](https://cert-portal.siemens.com/productcert/pdf/ssa-479842.pdf) (Third-party advisory)
- [cert-portal.siemens.com](https://cert-portal.siemens.com/productcert/pdf/ssa-501673.pdf) (Third-party advisory)
- [psirt.global.sonicwall.com](https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032) (Third-party advisory)
- [security.netapp.com](https://security.netapp.com/advisory/ntap-20211218-0001/) (Third-party advisory)
- [tools.cisco.com](https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd) (Third-party advisory)
- [debian.org](https://www.debian.org/security/2021/dsa-5024) (Third-party advisory)
- [kb.cert.org](https://www.kb.cert.org/vuls/id/930724) (Third-party advisory, Government resource)
- [oracle.com](https://www.oracle.com/security-alerts/cpujul2022.html) (Third-party advisory)
- [zerodayinitiative.com](https://www.zerodayinitiative.com/advisories/ZDI-21-1541/) (Third-party advisory, Vulnerability database)

## Questions

### What is CVE-2021-45105?

CVE-2021-45105 is a medium-severity flaw in Log4j from Apache, published on 18 December 2021. It can be attacked from anywhere on the internet without logging in, and nobody has to click anything. If it works, the attacker can take it offline.

### How serious is CVE-2021-45105?

It scores 5.9 out of 10 on the CVSS severity scale, which is medium. Our risk score for CVE-2021-45105 is 70 out of 100, which is High. Its action is "Patch now". Not confirmed as exploited yet, but serious or likely enough that it should not wait for a quiet month.

### Is CVE-2021-45105 being exploited?

It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at over 99%. That can change at any time, which is why we keep watching.

### Which versions does CVE-2021-45105 affect?

For Log4j from Apache: 2.0 to before 2.3.1, 2.4 to before 2.12.3, 2.13.0 to 2.16.0. The record lists 121 products in all, each with its versions, under "Who is affected" on this page.

### How do I fix CVE-2021-45105?

Install the update the vendor names in its advisory, linked first under "How do I fix" on this page. If you can't patch today, follow the vendor's mitigation and limit who can reach the affected system from the internet.

## Does CVE-2021-45105 affect you?

Precursor Intelligence keeps checking for you:

- **Tell us what you run.** Pick your software from a list, or let us work it out from your website.
- **We match it to every flaw.** Over 400,000 published flaws, checked against your list.
- **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it.
- **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools.

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