AMD EPYC™ 7001 Series: Improper Verification of Cryptographic Signature
CVE-2024-56161 is a high-severity improper verification of cryptographic signature vulnerability in AMD EPYC™ 7001 Series from AMD, with a CVSS 3.1 base score of 7.2 out of 10. It can be exploited with local access to the system by an attacker with administrator privileges, without any action from a user. There is no confirmed exploitation so far. EPSS estimates a 0.53% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of AMD EPYC™ 7001 Series you run against the affected versions below, and install the vendor's latest release.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| AMD | AMD EPYC™ 7001 Series | Not specified in the record | Not stated |
| AMD | AMD EPYC™ 7002 Series | Not specified in the record | Not stated |
| AMD | AMD EPYC™ 7003 Series | Not specified in the record | Not stated |
| AMD | AMD EPYC™ 9004 Series | Not specified in the record | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- HighSuccess depends on conditions outside the attacker's control.
- Privileges required
- HighAdministrator-level access is required first.
- User interaction
- NoneNo action by a victim is required.
- Scope
- ChangedThe attack can reach beyond the vulnerable component into other systems.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N. Scored by CNA (amd.com).
Official 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: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Verification of Cryptographic Signature
The product does not verify, or incorrectly verifies, the cryptographic signature for data.
More Improper Verification of Cryptographic Signature vulnerabilities (CWE-347)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other references
Recent Improper Verification of Cryptographic Signature vulnerabilities
- 9.3 Critical severity
- 8.8 High severity
- 8.1 High severity
- 7.8 High severity
- 8.7 High severity
- 9.1 Critical severity
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