CVE-2020-15093: Improper verification of signature threshold in tough
(updated )
The tough library, prior to 0.7.1, does not properly verify the uniqueness of keys in the signatures provided to meet the threshold of cryptographic signatures. It allows someone with access to a valid signing key to create multiple valid signatures in order to circumvent TUF requiring a minimum threshold of unique keys before the metadata is considered valid.
AWS would like to thank Erick Tryzelaar of the Google Fuchsia Team for reporting this issue.
References
- github.com/advisories/GHSA-5q2r-92f9-4m49
- github.com/awslabs/tough
- github.com/awslabs/tough/security/advisories/GHSA-5q2r-92f9-4m49
- github.com/theupdateframework/tuf/commit/2977188139d065ff3356c3cb4aec60c582b57e0e
- github.com/theupdateframework/tuf/pull/974
- nvd.nist.gov/vuln/detail/CVE-2020-15093
- rustsec.org/advisories/RUSTSEC-2020-0024.html
Code Behaviors & Features
Detect and mitigate CVE-2020-15093 with GitLab Dependency Scanning
Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →