Client Denial of Service on TUF
Impact
An 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.
The tuf maintainers would like to thank Erik MacLean of Analog Devices, Inc. for reporting this issue.
Patches
No fix exists for this issue.
Workarounds
No workarounds are known for this issue.
References
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | tuf | >= 0.7.2, < 0.12.2 | 0.12.2 |
References
- https://github.com/theupdateframework/tuf/issues/973
- https://github.com/theupdateframework/tuf/commits/develop
- https://github.com/advisories/GHSA-2828-9vh6-9m6j
- https://github.com/theupdateframework/tuf/security/advisories/GHSA-2828-9vh6-9m6j
- https://nvd.nist.gov/vuln/detail/CVE-2020-6173
- https://github.com/pypa/advisory-database/tree/main/vulns/tuf/PYSEC-2020-146.yaml
- https://github.com/theupdateframework/tuf
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L- Weakness (CWE)
CWE-400- Platform
- Python (PyPI)
- Package
tuf- Disclosed
- 14.01.2020
- Updated
- 11.10.2026 11:20
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2020-146 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-2828-9vh6-9m6j - CC BY 4.0
Vulnerability history: tuf
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 7
- First → latest
- 01.2020 05.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- Medium 4
- Low 2
Disclosures per year
- 2020: 3
- 2021: 1
- 2022: 1
- 2023: 0
- 2024: 1
- 2025: 0
- 2026: 1
-
Client Denial of Service on TUF this entry
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