Improper Verification of Cryptographic Signature Affecting rfc3161-client package, versions [,1.0.3)


Severity

Recommended
0.0
critical
0
10

CVSS assessment by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.01% (2nd percentile)

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  • Snyk IDSNYK-PYTHON-RFC3161CLIENT-10558120
  • published27 Jun 2025
  • disclosed20 Jun 2025
  • creditWilliam Woodruff

Introduced: 20 Jun 2025

NewCVE-2025-52556  (opens in a new tab)
CWE-347  (opens in a new tab)

How to fix?

Upgrade rfc3161-client to version 1.0.3 or higher.

Overview

Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature. An attacker can bypass signature validation by introducing a timestamp response signature that chains to a trusted root, allowing acceptance of forged timestamp responses.

References

CVSS Base Scores

version 4.0
version 3.1