Go-Attestation Improper Input Validation with attacker-controlled TPM Quote
### Impact An improper input validation vulnerability in go-attestation before 0.4.0 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. ### Patches This issue is resolved in version 0.4.0. If your usage of this library verifies PCRs using multiple quotes, make sure to use the new method `AKPublic.VerifyAll()` instead of `AKPublic.Verify`.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2022-0317US | low3.3 | — | ||
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 suc… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/google/go-attestationWEB
- https://github.com/google/go-attestation/commit/82f2c9c2c76e1d3691d17ee78116d1d93a123788WEB
- https://github.com/google/go-attestation/security/advisories/GHSA-99cg-575x-774pWEB
- https://nvd.nist.gov/vuln/detail/CVE-2022-0317ADVISORY
- https://pkg.go.dev/vuln/GO-2022-0294WEB
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