# What is CVE-2022-34819? > CVE-2022-34819 is a critical-severity flaw (CVSS 10.0) in Simatic Cp 1242-7 V2 from Siemens, published on 12 July 2022. 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 2.1%. If you run an affected version, plan in the vendor’s fix. Canonical page: https://www.precursorintelligence.com/what-is/cve-2022-34819 ## 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:** 54 out of 100 (Medium); action: Plan remediation. Kept up to date as the evidence changes. - **Severity:** Critical (CVSS 10.0 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:** 2.1% (latest exploit-likelihood forecast) - **Published:** 12 July 2022 - **Record last updated:** 14 March 2023 - **Main product:** Simatic Cp 1242-7 V2 from Siemens - **Affected products:** 30 ## What is CVE-2022-34819? 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 read data, change data and take it offline. ### The official description A vulnerability has been identified in SIMATIC CP 1242-7 V2 (All versions = V2.0 = V2.0 = V2.0 = V2.0 = V2.0 < V2.2.28), SIPLUS NET CP 1242-7 V2 (All versions < V3.3.46), SIPLUS NET CP 1543-1 (All versions < V3.0.22), SIPLUS S7-1200 CP 1243-1 (All versions < V3.3.46), SIPLUS S7-1200 CP 1243-1 RAIL (All versions < V3.3.46). The application lacks proper validation of user-supplied data when parsing specific messages. This could result in a heap-based buffer overflow. An attacker could leverage this vulnerability to execute code in the context of device. ### What kind of flaw is it? - CWE-787: Out-of-bounds Write - CWE-122: Heap-based Buffer Overflow ### How an attack on it works - Where an attacker can be: Anywhere on the internet - How hard it is to pull off: Easy: no special conditions - Login needed first: No login needed - Does someone have to click: No, nobody has to do anything - What an attacker gets: Can read data, change data and take it offline Severity vector: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H` ## Is CVE-2022-34819 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 2.1%. That can change at any time, which is why we keep watching. Exploit likelihood over the last 7 days: 2.1%, 2.1%, 2.1%, 2.1%, 2.1%, 2.1%, 2.1%. ### Timeline - 12 July 2022: Published - 14 March 2023: Record last updated ### How Precursor Intelligence ranks it CVE-2022-34819 scores **54 out of 100 (Medium)**, with the action "Plan remediation". 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-2022-34819? The published record lists 30 products. Versions are as published: "before 3.0.22" means every version up to, but not including, 3.0.22. - [Simatic Cp 1242-7 V2](https://www.precursorintelligence.com/product/siemens/simatic_cp_1242-7_v2) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [Simatic Cp 1242-7 V2 Firmware](https://www.precursorintelligence.com/product/siemens/simatic_cp_1242-7_v2_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions - [Simatic Cp 1243-1](https://www.precursorintelligence.com/product/siemens/simatic_cp_1243-1) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [Simatic Cp 1243-1 Firmware](https://www.precursorintelligence.com/product/siemens/simatic_cp_1243-1_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions - [Simatic Cp 1243-7 Lte Eu](https://www.precursorintelligence.com/product/siemens/simatic_cp_1243-7_lte_eu) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [Simatic Cp 1243-7 Lte Eu Firmware](https://www.precursorintelligence.com/product/siemens/simatic_cp_1243-7_lte_eu_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions - [Simatic Cp 1243-7 Lte Us](https://www.precursorintelligence.com/product/siemens/simatic_cp_1243-7_lte_us) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [Simatic Cp 1243-7 Lte Us Firmware](https://www.precursorintelligence.com/product/siemens/simatic_cp_1243-7_lte_us_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions - [Simatic Cp 1243-8 Irc](https://www.precursorintelligence.com/product/siemens/simatic_cp_1243-8_irc) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [Simatic Cp 1243-8 Irc Firmware](https://www.precursorintelligence.com/product/siemens/simatic_cp_1243-8_irc_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions - [Simatic Cp 1542sp-1 Irc](https://www.precursorintelligence.com/product/siemens/simatic_cp_1542sp-1_irc) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [Simatic Cp 1542sp-1 Irc Firmware](https://www.precursorintelligence.com/product/siemens/simatic_cp_1542sp-1_irc_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.0 and later - [Simatic Cp 1543-1](https://www.precursorintelligence.com/product/siemens/simatic_cp_1543-1) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [Simatic Cp 1543-1 Firmware](https://www.precursorintelligence.com/product/siemens/simatic_cp_1543-1_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 3.0.22 - [Simatic Cp 1543sp-1](https://www.precursorintelligence.com/product/siemens/simatic_cp_1543sp-1) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [Simatic Cp 1543sp-1 Firmware](https://www.precursorintelligence.com/product/siemens/simatic_cp_1543sp-1_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.0 and later - [Siplus Et 200sp Cp 1542sp-1 Irc Tx Rail](https://www.precursorintelligence.com/product/siemens/siplus_et_200sp_cp_1542sp-1_irc_tx_rail) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [Siplus Et 200sp Cp 1542sp-1 Irc Tx Rail Firmware](https://www.precursorintelligence.com/product/siemens/siplus_et_200sp_cp_1542sp-1_irc_tx_rail_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.0 and later - [Siplus Et 200sp Cp 1543sp-1 Isec](https://www.precursorintelligence.com/product/siemens/siplus_et_200sp_cp_1543sp-1_isec) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [Siplus Et 200sp Cp 1543sp-1 Isec Firmware](https://www.precursorintelligence.com/product/siemens/siplus_et_200sp_cp_1543sp-1_isec_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.0 and later - [Siplus Et 200sp Cp 1543sp-1 Isec Tx Rail](https://www.precursorintelligence.com/product/siemens/siplus_et_200sp_cp_1543sp-1_isec_tx_rail) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [Siplus Et 200sp Cp 1543sp-1 Isec Tx Rail Firmware](https://www.precursorintelligence.com/product/siemens/siplus_et_200sp_cp_1543sp-1_isec_tx_rail_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): 2.0 and later - [Siplus Net Cp 1242-7 V2](https://www.precursorintelligence.com/product/siemens/siplus_net_cp_1242-7_v2) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [Siplus Net Cp 1242-7 V2 Firmware](https://www.precursorintelligence.com/product/siemens/siplus_net_cp_1242-7_v2_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions - [Siplus Net Cp 1543-1](https://www.precursorintelligence.com/product/siemens/siplus_net_cp_1543-1) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [Siplus Net Cp 1543-1 Firmware](https://www.precursorintelligence.com/product/siemens/siplus_net_cp_1543-1_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 3.0.22 - [Siplus S7-1200 Cp 1243-1](https://www.precursorintelligence.com/product/siemens/siplus_s7-1200_cp_1243-1) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [Siplus S7-1200 Cp 1243-1 Firmware](https://www.precursorintelligence.com/product/siemens/siplus_s7-1200_cp_1243-1_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions - [Siplus S7-1200 Cp 1243-1 Rail](https://www.precursorintelligence.com/product/siemens/siplus_s7-1200_cp_1243-1_rail) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [Siplus S7-1200 Cp 1243-1 Rail Firmware](https://www.precursorintelligence.com/product/siemens/siplus_s7-1200_cp_1243-1_rail_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions ## How do I fix CVE-2022-34819? 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 advisory 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 - [cert-portal.siemens.com](https://cert-portal.siemens.com/productcert/pdf/ssa-517377.pdf) (Patch, Vendor advisory) ## Questions ### What is CVE-2022-34819? CVE-2022-34819 is a critical-severity flaw in Simatic Cp 1242-7 V2 from Siemens, published on 12 July 2022. It can be attacked from anywhere on the internet without logging in, and nobody has to click anything. If it works, the attacker can read data, change data and take it offline. ### How serious is CVE-2022-34819? It scores 10.0 out of 10 on the CVSS severity scale, which is critical. Our risk score for CVE-2022-34819 is 54 out of 100, which is Medium. Its action is "Plan remediation". Not confirmed as exploited yet, but serious or likely enough that it should not wait for a quiet month. ### Is CVE-2022-34819 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 2.1%. That can change at any time, which is why we keep watching. ### Which versions does CVE-2022-34819 affect? For Simatic Cp 1242-7 V2 from Siemens: version not specified. The record lists 30 products in all, each with its versions, under "Who is affected" on this page. ### How do I fix CVE-2022-34819? 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-2022-34819 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. Start free (no card, nothing to install): https://www.precursorintelligence.com/register Book a demo: https://www.precursorintelligence.com/contact