{"id":"CVE-2020-6173","aliases":["EUVD-2020-0225","GHSA-2828-9vh6-9m6j","PYSEC-2020-146"],"status":"published","title":"Client Denial of Service on TUF","description":"TUF (aka The Update Framework) 0.7.2 through 0.12.1 allows Uncontrolled Resource Consumption.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.01758,"percentile":0.7829,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-400"],"published":"2020-01-14T18:50:31Z","modified":"2026-10-20T10:54:23Z","fixes":[{"ecosystem":"PyPI","package":"tuf","fixed_in":["0.12.2"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"tuf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0.7.2"},{"fixed":"0.12.2"}]}]},{"source":"osv","ecosystem":"PyPI","package":"tuf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0.7.2"},{"fixed":"0.12.2"}]}],"versions":["0.10.0","0.10.1","0.10.2","0.11.0","0.11.1","0.11.2.dev1","0.11.2.dev2","0.11.2.dev3","0.11.dev0","0.12.0","0.12.1","0.12.dev0","0.12.dev1","0.12.dev2","0.7.5","0.9.8","0.9.9"]},{"source":"osv","ecosystem":"PyPI","package":"tuf","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0.7.5"},{"fixed":"0.12.2"}]}],"versions":["0.7.5","0.9.8","0.9.9","0.10.0","0.10.1","0.10.2","0.11.dev0","0.11.0","0.11.1","0.11.2.dev1","0.11.2.dev2","0.11.2.dev3","0.12.dev0","0.12.dev1","0.12.dev2","0.12.0","0.12.1"]}],"products":[{"vendor":"linuxfoundation","product":"the_update_framework"}],"references":[{"url":"https://github.com/theupdateframework/tuf/commits/develop","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://github.com/theupdateframework/tuf/issues/973","tags":["x_refsource_MISC","x_transferred","Exploit","Issue Tracking","Patch","Third Party Advisory","fix","web","report"]},{"url":"https://github.com/theupdateframework/tuf/security/advisories/GHSA-2828-9vh6-9m6j","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-6173","tags":["advisory"]},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/tuf/PYSEC-2020-146.yaml","tags":["web"]},{"url":"https://github.com/advisories/GHSA-2828-9vh6-9m6j","tags":["advisory"]},{"url":"https://github.com/theupdateframework/tuf","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2020-6173","description":"TUF (aka The Update Framework) 0.7.2 through 0.12.1 allows Uncontrolled Resource Consumption.","status":"published","published":"2020-01-14T18:50:31Z","modified":"2024-08-04T08:55:22.148Z","updated_at":"2026-11-02T14:35:52.592504Z"}],"euvd":[{"id":"EUVD-2020-0225","description":"TUF (aka The Update Framework) 0.7.2 through 0.12.1 allows Uncontrolled Resource Consumption.","status":"published","published":"2020-01-14T18:50:31Z","modified":"2024-08-04T08:55:22Z","updated_at":"2026-11-03T03:08:04.192112Z"}],"ghsa":[{"id":"GHSA-2828-9vh6-9m6j","title":"Client Denial of Service on TUF","description":"### Impact\nAn attacker who can gain file access to the repository and modify metadata files may cause a denial of service to clients by creating many invalid signatures on a metadata file. Having a large number of signatures to verify will delay the moment when the client will determine the signature is not valid. This delay may be for at least a few minutes, but possibly could be longer especially if multiple files are impacted.\n\nThe tuf maintainers would like to thank Erik MacLean of Analog Devices, Inc. for reporting this issue.\n\n### Patches\nNo fix exists for this issue. \n\n### Workarounds\nNo workarounds are known for this issue.\n\n### References\n* [CVE-2020-6173](https://nvd.nist.gov/vuln/detail/CVE-2020-6173)\n* [Issue #973](https://github.com/theupdateframework/tuf/issues/973)","status":"published","published":"2020-08-21T16:25:48Z","modified":"2024-11-18T22:38:25Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:38:20.833758Z"}],"nvd":[{"id":"CVE-2020-6173","description":"TUF (aka The Update Framework) 0.7.2 through 0.12.1 allows Uncontrolled Resource Consumption.","status":"published","published":"2020-01-14T19:15:13.797Z","modified":"2026-06-17T03:22:49.05Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:05:52.385274Z"}],"osv":[{"id":"CVE-2020-6173","description":"TUF (aka The Update Framework) 0.7.2 through 0.12.1 allows Uncontrolled Resource Consumption.","status":"published","published":"2020-01-14T19:15:13.797Z","modified":"2026-10-20T10:54:23.290543197Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:44:17.34531Z"},{"id":"GHSA-2828-9vh6-9m6j","title":"Client Denial of Service on TUF","description":"### Impact\nAn attacker who can gain file access to the repository and modify metadata files may cause a denial of service to clients by creating many invalid signatures on a metadata file. Having a large number of signatures to verify will delay the moment when the client will determine the signature is not valid. This delay may be for at least a few minutes, but possibly could be longer especially if multiple files are impacted.\n\nThe tuf maintainers would like to thank Erik MacLean of Analog Devices, Inc. for reporting this issue.\n\n### Patches\nNo fix exists for this issue. \n\n### Workarounds\nNo workarounds are known for this issue.\n\n### References\n* [CVE-2020-6173](https://nvd.nist.gov/vuln/detail/CVE-2020-6173)\n* [Issue #973](https://github.com/theupdateframework/tuf/issues/973)","status":"published","published":"2020-08-21T16:25:48Z","modified":"2024-11-18T22:46:46.15503Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"},{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T15:46:33.956911Z"},{"id":"PYSEC-2020-146","description":"TUF (aka The Update Framework) 0.7.2 through 0.12.1 allows Uncontrolled Resource Consumption.","status":"published","published":"2020-01-14T19:15:00Z","modified":"2023-11-08T04:03:56.811426Z","updated_at":"2026-11-02T15:52:52.192131Z"}]}}