SB2022013131 - Input validation error in go-attestation

Description

This security bulletin contains information about 1 vulnerability.

1) Input validation error (CVE-ID: CVE-2022-0317)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote attacker to spoof events in the TCG log.

The vulnerability exists due to improper input validation in AKPublic.Verify when processing an attacker-controlled TPM Quote over no or some PCRs. A remote attacker can provide a maliciously formed Quote to spoof events in the TCG log.

Exploitation requires coupling the issue with a maliciously crafted TCG log in Eventlog.Verify, which can defeat remotely attested measured boot.

Remediation

Install update from vendor's website.

References

• https://github.com/google/go-attestation/security/advisories/GHSA-99cg-575x-774p
• https://github.com/google/go-attestation/security/advisories