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CVE-2021-29921

CVE-2021-29921

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

In Python before 3,9,5, the ipaddress library mishandles leading zero characters in the octets of an IP address string. This (in some situations) allows attackers to bypass access control that is based on IP addresses.

CVSS 9.8 · Critical · EPSS 6.9% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • n/a

    Versions
    • n/a: Affected

    No fix published

  • pypy3 Debian:12

    Affected ranges
    • ECOSYSTEM: < 7.3.8+dfsg-1

    Update to 7.3.8+dfsg-1

  • pypy3 Debian:13

    Affected ranges
    • ECOSYSTEM: < 7.3.8+dfsg-1

    Update to 7.3.8+dfsg-1

  • pypy3 Debian:14

    Affected ranges
    • ECOSYSTEM: < 7.3.8+dfsg-1

    Update to 7.3.8+dfsg-1

  • python3.8 Ubuntu:Pro:18.04:LTS

    Versions
    • 3.8.0-3~18.04
    • 3.8.0-3~18.04.1
    • 3.8.0-3ubuntu1~18.04.2
    • 3.8.0-3ubuntu1~18.04.2+esm1
    Affected ranges
    • ECOSYSTEM: < 3.8.0-3ubuntu1~18.04.2+esm2

    Update to 3.8.0-3ubuntu1~18.04.2+esm2

  • python3.8 Ubuntu:20.04:LTS

    Versions
    • 3.8.0-1
    • 3.8.0-2
    • 3.8.0-3
    • 3.8.0-4
    • 3.8.0-5
    • 3.8.1-2ubuntu3
    • 3.8.2~rc1-1ubuntu1
    • 3.8.2-1
    • 3.8.2-1ubuntu1
    • 3.8.2-1ubuntu1.1
    • 3.8.2-1ubuntu1.2
    • 3.8.5-1~20.04
    • 3.8.5-1~20.04.2
    • 3.8.5-1~20.04.3
    • 3.8.10-0ubuntu1~20.04
    Affected ranges
    • ECOSYSTEM: < 3.8.10-0ubuntu1~20.04.1

    Update to 3.8.10-0ubuntu1~20.04.1

  • python3.9 Ubuntu:20.04:LTS

    Versions
    • 3.9.0~rc1-1~20.04
    • 3.9.0-5~20.04
    Affected ranges
    • ECOSYSTEM: < 3.9.5-3~20.04.1

    Update to 3.9.5-3~20.04.1

Original sources

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