p PatchFirst

USN-8087-2

USN-8087-2 · python-cryptography regression

This page contains facts from public vulnerability sources. Check the original advisory before updating.

USN-8087-1 fixed a vulnerability in python-cryptography. The update caused a regression when using ECC algorithms with certain software. This update fixes the problem. We apologize for the inconvenience. Original advisory details: It was discovered that python-cryptography incorrectly handled subgroup validation for SECT curves. A remote attacker could use this issue to perform a subgroup attack and possibly recover the least significant bits of private keys.

Fix available

Published
Updated

Stack: system

Affected products and versions

  • python-cryptography Ubuntu:22.04:LTS

    Versions
    • 3.3.2-1
    • 3.3.2-1build1
    • 3.4.8-1
    • 3.4.8-1ubuntu1
    • 3.4.8-1ubuntu2
    • 3.4.8-1ubuntu2.1
    • 3.4.8-1ubuntu2.2
    • 3.4.8-1ubuntu2.3
    Affected ranges
    • ECOSYSTEM: < 3.4.8-1ubuntu2.4

    Update to 3.4.8-1ubuntu2.4

  • python-cryptography Ubuntu:24.04:LTS

    Versions
    • 38.0.4-4
    • 38.0.4-4ubuntu1
    • 41.0.7-3
    • 41.0.7-4build2
    • 41.0.7-4build3
    • 41.0.7-4ubuntu0.1
    • 41.0.7-4ubuntu0.3
    Affected ranges
    • ECOSYSTEM: < 41.0.7-4ubuntu0.4

    Update to 41.0.7-4ubuntu0.4

  • python-cryptography Ubuntu:25.10

    Versions
    • 43.0.0-1ubuntu1
    • 43.0.0-1ubuntu1.1
    Affected ranges
    • ECOSYSTEM: < 43.0.0-1ubuntu1.2

    Update to 43.0.0-1ubuntu1.2

Original sources

Check your server →