{"id":"CVE-2020-15093","revision":"c1144f0fc3014fa7b2953649adaf29ba","records":[{"revision":"c1144f0fc3014fa7b2953649adaf29ba","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2020-15093","aliases":[],"title":"Improper verification of signature threshold in tough","description":"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.","state":0,"publishedAt":"2020-07-09T18:45:16+00:00","modifiedAt":"2024-08-04T13:08:21.663+00:00","affected":[{"ecosystem":"Vendor product","name":"tough","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"tough\",\n                    \"vendor\": \"awslabs\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"< 0.7.1\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N","score":8.6,"severity":"HIGH"}],"references":["https://github.com/awslabs/tough/security/advisories/GHSA-5q2r-92f9-4m49","https://crates.io/crates/tough","https://github.com/theupdateframework/tuf/pull/974","https://github.com/theupdateframework/tuf/commit/2977188139d065ff3356c3cb4aec60c582b57e0e"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2020-15093","license":"CVE Program Terms of Use","key":"cve-program:CVE-2020-15093","identifiers":["CVE-2020-15093"]},"retained":false,"historicalAffected":[]}],"coverage":[]}