CVE-2023-25529: nvidia dgx a100 bmc Observable Timing Discrepancy

Vulnerability summary

CVE-2023-25529 is a high (CVSS 8.1) Observable Timing Discrepancy vulnerability in nvidia dgx a100 bmc. EPSS estimates a 0.63% chance of exploitation in the next 30 days, higher than 48.9% of scored vulnerabilities.

Timeline

1. 20-09-2023
   PublishedVulnerability first disclosed.
2. 02-08-2024
   Last modifiedVulnerability information updated.

Description

NVIDIA DGX H100 BMC and DGX A100 BMC contains a vulnerability in the host KVM daemon, where an unauthenticated attacker may cause a leak of another user’s session token by observing timing discrepancies between server responses. A successful exploit of this vulnerability may lead to information disclosure, escalation of privileges, and data tampering.

• CWE-208Observable Timing DiscrepancyTwo separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not.
• CWE-203Observable DiscrepancyThe product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor.