GHSA-6qhv-4h7r-2g9m

Source

https://github.com/advisories/GHSA-6qhv-4h7r-2g9m

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/06/GHSA-6qhv-4h7r-2g9m/GHSA-6qhv-4h7r-2g9m.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-6qhv-4h7r-2g9m

Aliases

CVE-2025-52556

Published

2025-06-20T18:08:40Z

Modified

2025-06-27T22:37:36.453442Z

Severity

9.3 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator

Summary

rfc3161-client has insufficient verification for timestamp response signatures

Details

Impact

rfc3161-client 1.0.2 and earlier contain a flaw in their timestamp response signature verification logic. In particular, it performs chain verification against the TSR's embedded certificates up to the trusted root(s), but fails to verify the TSR's own signature against the timestamping leaf certificates. Consequently, vulnerable versions perform insufficient signature validation to properly consider a TSR verified, as the attacker can introduce any TSR signature so long as the embedded leaf chains up to some root TSA.

Patches

Users should immediately upgrade to rfc3161-client 1.0.3 or later.

Workarounds

There is no workaround possible. Users should immediately upgrade to a fixed version.

Database specific

{
    "nvd_published_at": "2025-06-21T02:15:19Z",
    "cwe_ids": [
        "CWE-347"
    ],
    "severity": "CRITICAL",
    "github_reviewed": true,
    "github_reviewed_at": "2025-06-20T18:08:40Z"
}

References

Affected packages

PyPI / rfc3161-client

Package

Name: rfc3161-client; View open source insights on deps.dev
Purl: pkg:pypi/rfc3161-client

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1.0.3

Affected versions

0.*

0.0.2

0.0.3

0.0.4

0.1.0

0.1.1

0.1.2

1.*

1.0.0

1.0.1

1.0.2

Database specific

{
    "last_known_affected_version_range": "<= 1.0.2"
}