The tough library (Rust/crates.io) prior to version 0.7.1 does not properly verify the threshold of cryptographic signatures. It allows an attacker to duplicate a valid signature in order to circumvent TUF requiring a minimum threshold of unique signatures before the metadata is considered valid. A fix is available in version 0.7.1. CVE-2020-6174 is assigned to the same vulnerability in the TUF reference implementation.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15093
Reference (s):
- https://github.com/awslabs/tough/security/advisories/GHSA-5q2r-92f9-4m49
- URL: https://github.com/awslabs/tough/security/advisories/GHSA-5q2r-92f9-4m49
- https://crates.io/crates/tough
- URL: https://crates.io/crates/tough
- https://github.com/theupdateframework/tuf/commit/2977188139d065ff3356c3cb4aec60c582b57e0e