| Name | CVE-2024-56161 |
| Description | Improper signature verification in AMD CPU ROM microcode patch loader may allow an attacker with local administrator privilege to load malicious CPU microcode resulting in loss of confidentiality and integrity of a confidential guest running under AMD SEV-SNP. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-4098-1 |
| Debian Bugs | 1095470 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| amd64-microcode (PTS) | bullseye/non-free | 3.20240820.1~deb11u1 | vulnerable |
| bullseye/non-free (security) | 3.20250311.1~deb11u1 | fixed |
| bookworm/non-free-firmware | 3.20240820.1~deb12u1 | vulnerable |
| bookworm/non-free-firmware (security) | 3.20230719.1~deb12u1 | vulnerable |
| trixie/non-free-firmware, sid/non-free-firmware | 3.20250311.1 | fixed |
The information below is based on the following data on fixed versions.
Notes
[bookworm] - amd64-microcode <no-dsa> (Minor issue in Debian context; AMD-SEV not supported)
https://www.openwall.com/lists/oss-security/2025/01/22/1
https://www.amd.com/en/resources/product-security/bulletin/amd-sb-3019.html
https://github.com/google/security-research/security/advisories/GHSA-4xq7-4mgh-gp6w
https://github.com/google/security-research/tree/master/pocs/cpus/entrysign
https://github.com/google/security-research/tree/master/pocs/cpus/entrysign/zentool
https://bughunters.google.com/blog/5424842357473280/zen-and-the-art-of-microcode-hacking