CVE-2022-0317 Improper Input Validation in AKPublic.Verify in go-attestation
A local attacker can bypass measured boot attestation by spoofing TCG log events due to improper input validation in go-attestation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-0317?
CVE-2022-0317 is a medium-severity vulnerability in Google LLC go-attestation, published on 4 Feb 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An improper input validation vulnerability in go-attestation before 0.3.3 allows local users to provide a maliciously-formed Quote over no/some PCRs, causing AKPublic.Verify to succeed despite the inconsistency. Subsequent use of the same set of PCR values in Eventlog.Verify lacks the authentication performed by quote verification, meaning a local attacker could couple this vulnerability with a maliciously-crafted TCG log in Eventlog.Verify to spoof events in the TCG log, hence defeating remotely-attested measured-boot. We recommend upgrading to Version 0.4.0 or above.
Weakness: CWE-20
Which versions are affected by CVE-2022-0317?
3 open source packages ship an affected version, including github.com/google/go-attestation. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/google/go-attestation Go | All versions | 0.4.0 |
github.com/google/go-attestation Go | All versions | 0.4.0 |
github.com/google/go-attestation Go | All versions | 0.4.0 |
Products include Google Go-Attestation.
How do I fix CVE-2022-0317?
Upgrade github.com/google/go-attestation to 0.4.0 or later.
Is CVE-2022-0317 being exploited?
There is no known exploitation of CVE-2022-0317 in the wild and no public exploit code.
Other vulnerabilities in Google LLC go-attestation
Sources
Also known as GHSA-99cg-575x-774p, GO-2022-0294.