What is the severity of CVE-2021-43267?

CVE-2021-43267 has a CVSS Base Score of 9.8/10 and is classified as Critical severity. It is important to assess the risk based on your specific environment.

How do I fix CVE-2021-43267?

Remediation typically involves updating the affected software products to the latest patched version. Refer to the 'Affected Products' and 'Remediation' sections on this page for specific mitigation steps and vendor advisories.

Home→Vulnerabilities→CVE-2021-43267

Critical Risk Disclosed

CVE-2021-43267

An issue was discovered in net/tipc/crypto.c in the Linux kernel before 5.14.16. The Transparent Inter-Process Communication (TIPC) functionality allows remote attackers to exploit insufficient validation of user-supplied sizes for the MSG_CRYPTO message type.

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Exploitation Probability (EPSS)

High Priority

72.62%

The Exploit Prediction Scoring System (EPSS) uses machine learning to estimate the probability that a vulnerability will be exploited in the wild within the next 30 days.

0% (Theoretical)100% (Certainty)

7-Day Exploitation Trend

Vulnerability Timeline

2 events

Nov 2, 2021

Vulnerability Disclosed

Published to component-level vulnerability database.

Nov 7, 2023

Last Updated

Record updated with new analysis or tags.

Threat Actor Attribution

PREMIUM INTEL

Associated Groups:Lazarus Group, APT28

Ransomware Campaigns:LockBit 3.0, BlackCat

IoCs (Indicators):14 IPs, 3 Hashes

Remediation & Mitigation

SOLUTION

Official patches and mitigation steps are available for this vulnerability.

# Update Command
apt-get update && apt-get upgrade -y specific-package
# Verify installation
dpkg -l | grep package-name

Affected Products

17 Total

linux/linux_kernelAll Versions

fedoraproject/fedora34

fedoraproject/fedora35

netapp/h300s-

netapp/h300s_firmware-

References

http://www.openwall.com/lists/oss-security/2022/02/10/1Openwall

ExploitMailing ListThird Party Advisory

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.16Kernel

Mailing ListRelease NotesVendor Advisory

https://github.com/torvalds/linux/commit/fa40d9734a57bcbfa79a280189799f76c88f7bb0GitHub

PatchThird Party Advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CVWL7HZV5T5OEKJPO2D67RMFMKBBXGGB/Fedoraproject

Am I Vulnerable?

Check your domain or package.json for CVE-2021-43267 exposure.

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Vulnerability Details

CVSS Base Score

9.8/ 10

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Published Date

Nov 2, 2021

Last Modified

Nov 7, 2023

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