# What is CVE-2022-38773? > CVE-2022-38773 is a medium-severity flaw (CVSS 6.8) in Simatic Drive Controller CPU 1504d Tf Firmware from Siemens, published on 10 January 2023. 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 0.3%. If you run an affected version, plan in the vendor’s fix. Canonical page: https://www.precursorintelligence.com/what-is/cve-2022-38773 ## At a glance - **Verdict:** Plan it in. No sign of exploitation and a low forecast. Patch it in your normal update cycle. - **Precursor Intelligence risk score:** 24 out of 100 (Low); action: Monitor. Kept up to date as the evidence changes. - **Severity:** Medium (CVSS 6.8 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:** 0.3% (latest exploit-likelihood forecast) - **Published:** 10 January 2023 - **Record last updated:** 11 June 2024 - **Main product:** Simatic Drive Controller CPU 1504d Tf Firmware from Siemens - **Affected products:** 140 ## What is CVE-2022-38773? In plain terms An attacker has to be physically at the device 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 Affected devices do not contain an Immutable Root of Trust in Hardware. With this the integrity of the code executed on the device can not be validated during load-time. An attacker with physical access to the device could use this to replace the boot image of the device and execute arbitrary code. ### What kind of flaw is it? - CWE-1326: Missing Immutable Root of Trust in Hardware ### How an attack on it works - Where an attacker can be: Physically at the device - 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:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H` ## Is CVE-2022-38773 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 0.3%. That can change at any time, which is why we keep watching. Exploit likelihood over the last 7 days: 0.3%, 0.3%, 0.3%, 0.3%, 0.3%, 0.3%, 0.3%. ### Timeline - 10 January 2023: Published - 11 June 2024: Record last updated ### How Precursor Intelligence ranks it CVE-2022-38773 scores **24 out of 100 (Low)**, with the action "Monitor". 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-2022-38773? The published record lists 140 products. - [Simatic Drive Controller CPU 1504d Tf Firmware](https://www.precursorintelligence.com/product/siemens/simatic_drive_controller_cpu_1504d_tf_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): version not specified - [Simatic Drive Controller CPU 1504d Tf](https://www.precursorintelligence.com/product/siemens/simatic_drive_controller_cpu_1504d_tf) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [Simatic Drive Controller CPU 1507d Tf](https://www.precursorintelligence.com/product/siemens/simatic_drive_controller_cpu_1507d_tf) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - [Simatic Drive Controller CPU 1507d Tf Firmware](https://www.precursorintelligence.com/product/siemens/simatic_drive_controller_cpu_1507d_tf_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): version not specified - 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Siplus S7-1500 CPU 1518-4 Pn/dp Mfp by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - Siplus S7-1500 CPU 1518-4 Pn/dp Mfp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): version not specified - Siplus S7-1500 CPU 1518f-4 Pn/dp by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified - Siplus S7-1500 CPU 1518f-4 Pn/dp Firmware by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): version not specified ## How do I fix CVE-2022-38773? 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-482757.pdf) (Vendor advisory) - [cert-portal.siemens.com](https://cert-portal.siemens.com/productcert/html/ssa-482757.html) ## Questions ### What is CVE-2022-38773? CVE-2022-38773 is a medium-severity flaw in Simatic Drive Controller CPU 1504d Tf Firmware from Siemens, published on 10 January 2023. An attacker has to be physically at the device 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-2022-38773? It scores 6.8 out of 10 on the CVSS severity scale, which is medium. Our risk score for CVE-2022-38773 is 24 out of 100, which is Low. Its action is "Monitor". No sign of exploitation and a low forecast. Patch it in your normal update cycle. ### Is CVE-2022-38773 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 0.3%. That can change at any time, which is why we keep watching. ### Which versions does CVE-2022-38773 affect? For Simatic Drive Controller CPU 1504d Tf Firmware from Siemens: version not specified. The record lists 140 products in all, each with its versions, under "Who is affected" on this page. ### How do I fix CVE-2022-38773? 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-2022-38773 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