Vulnerability Details CVE-2020-15093
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 31.8%
CVSS Severity
CVSS v3 Score 8.6
CVSS v2 Score 5.0
References
- https://crates.io/crates/tough
- https://github.com/awslabs/tough/security/advisories/GHSA-5q2r-92f9-4m49
- https://github.com/theupdateframework/tuf/commit/2977188139d065ff3356c3cb4aec60c582b57e0e
- https://github.com/theupdateframework/tuf/pull/974
- https://crates.io/crates/tough
- https://github.com/awslabs/tough/security/advisories/GHSA-5q2r-92f9-4m49
- https://github.com/theupdateframework/tuf/commit/2977188139d065ff3356c3cb4aec60c582b57e0e
- https://github.com/theupdateframework/tuf/pull/974
Products affected by CVE-2020-15093
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cpe:2.3:a:amazon:tough:-
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cpe:2.3:a:amazon:tough:0.1.0
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cpe:2.3:a:amazon:tough:0.2.0
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cpe:2.3:a:amazon:tough:0.3.0
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cpe:2.3:a:amazon:tough:0.4.0
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cpe:2.3:a:amazon:tough:0.5.0
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cpe:2.3:a:amazon:tough:0.6.0
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cpe:2.3:a:amazon:tough:0.7.0