p PatchFirst

CVE-2021-33503

CVE-2021-33503

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

An issue was discovered in urllib3 before 1.26.5. When provided with a URL containing many @ characters in the authority component, the authority regular expression exhibits catastrophic backtracking, causing a denial of service if a URL were passed as a parameter or redirected to via an HTTP redirect.

CVSS 7.5 · High · EPSS 3.3% · Fix available

Published
Updated

Stack: system · python

Affected products and versions

  • n/a

    Versions
    • n/a: Affected

    No fix published

  • python-urllib3 Debian:12

    Affected ranges
    • ECOSYSTEM: < 1.26.5-1~exp1

    Update to 1.26.5-1~exp1

  • python-urllib3 Debian:13

    Affected ranges
    • ECOSYSTEM: < 1.26.5-1~exp1

    Update to 1.26.5-1~exp1

  • python-urllib3 Debian:14

    Affected ranges
    • ECOSYSTEM: < 1.26.5-1~exp1

    Update to 1.26.5-1~exp1

  • urllib3 PyPI

    Versions
    • 1.25.10
    • 1.25.11
    • 1.25.4
    • 1.25.5
    • 1.25.6
    • 1.25.7
    • 1.25.8
    • 1.25.9
    • 1.26.0
    • 1.26.1
    • 1.26.2
    • 1.26.3
    • 1.26.4
    Affected ranges
    • ECOSYSTEM: ≥ 1.25.4, < 1.26.5

    Update to 1.26.5

  • urllib3 PyPI

    Versions
    • 1.25.10
    • 1.25.11
    • 1.25.4
    • 1.25.5
    • 1.25.6
    • 1.25.7
    • 1.25.8
    • 1.25.9
    • 1.26.0
    • 1.26.1
    • 1.26.2
    • 1.26.3
    • 1.26.4
    Affected ranges
    • GIT: ≥ 5b047b645f5f93900d5e2fc31230848c25eb1f5f, < 2d4a3fee6de2fa45eb82169361918f759269b4ec
    • ECOSYSTEM: ≥ 1.25.4, < 1.26.5

    Update to 1.26.5

  • python-pip Ubuntu:20.04:LTS

    Versions
    • 18.1-5
    • 18.1-5build1
    • 18.1-5ubuntu1
    • 20.0.2-2
    • 20.0.2-4
    • 20.0.2-5
    • 20.0.2-5ubuntu1
    • 20.0.2-5ubuntu1.1
    • 20.0.2-5ubuntu1.3
    • 20.0.2-5ubuntu1.4
    • 20.0.2-5ubuntu1.5
    • 20.0.2-5ubuntu1.6
    Affected ranges
    • ECOSYSTEM: < 20.0.2-5ubuntu1.7

    Update to 20.0.2-5ubuntu1.7

  • python-urllib3 Ubuntu:20.04:LTS

    Versions
    • 1.24.1-1ubuntu1
    • 1.24.1-1ubuntu2
    • 1.25.8-1
    • 1.25.8-2
    • 1.25.8-2ubuntu0.1
    Affected ranges
    • ECOSYSTEM: < 1.25.8-2ubuntu0.2

    Update to 1.25.8-2ubuntu0.2

Original sources

Check your server →