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CVE-2021-3737

CVE-2021-3737

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

A flaw was found in python. An improperly handled HTTP response in the HTTP client code of python may allow a remote attacker, who controls the HTTP server, to make the client script enter an infinite loop, consuming CPU time. The highest threat from this vulnerability is to system availability.

CVSS 7.5 · High · EPSS 13.2% · Fix available

Published
Updated

Stack: system · python

Affected products and versions

  • python

    Versions
    • Fixed in python v3.6.14, python v3.7.11, python v3.8.11, python v3.9.6, python v3.10.0b2: 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

  • python3.4 Ubuntu:Pro:14.04:LTS

    Versions
    • 3.4~b1-0ubuntu3
    • 3.4~b1-4ubuntu4
    • 3.4~b1-4ubuntu6
    • 3.4~b1-5ubuntu2
    • 3.4~b2-1
    • 3.4~b3-1ubuntu1
    • 3.4~rc1-1build1
    • 3.4~rc2-1
    • 3.4~rc3-0ubuntu1
    • 3.4.0-1
    • 3.4.0-2ubuntu1
    • 3.4.0-2ubuntu1.1
    • 3.4.3-1ubuntu1~14.04.1
    • 3.4.3-1ubuntu1~14.04.3
    • 3.4.3-1ubuntu1~14.04.4
    • 3.4.3-1ubuntu1~14.04.5
    • 3.4.3-1ubuntu1~14.04.6
    • 3.4.3-1ubuntu1~14.04.7
    • 3.4.3-1ubuntu1~14.04.7+esm2
    • 3.4.3-1ubuntu1~14.04.7+esm4
    • 3.4.3-1ubuntu1~14.04.7+esm6
    • 3.4.3-1ubuntu1~14.04.7+esm7
    • 3.4.3-1ubuntu1~14.04.7+esm8
    • 3.4.3-1ubuntu1~14.04.7+esm10
    Affected ranges
    • ECOSYSTEM: < 3.4.3-1ubuntu1~14.04.7+esm11

    Update to 3.4.3-1ubuntu1~14.04.7+esm11

  • python3.5 Ubuntu:Pro:14.04:LTS

    Versions
    • 3.5.2-2ubuntu0~16.04.4~14.04.1
    Affected ranges
    • ECOSYSTEM: < 3.5.2-2ubuntu0~16.04.4~14.04.1+esm1

    Update to 3.5.2-2ubuntu0~16.04.4~14.04.1+esm1

  • python3.5 Ubuntu:Pro:16.04:LTS

    Versions
    • 3.5.0-3
    • 3.5.0-3ubuntu1
    • 3.5.1~rc1-2ubuntu1
    • 3.5.1-1
    • 3.5.1-2
    • 3.5.1-3
    • 3.5.1-5
    • 3.5.1-6ubuntu1
    • 3.5.1-6ubuntu2
    • 3.5.1-9ubuntu1
    • 3.5.1-10
    • 3.5.2-2~16.01
    • 3.5.2-2~16.04
    • 3.5.2-2ubuntu0~16.04.1
    • 3.5.2-2ubuntu0~16.04.2
    • 3.5.2-2ubuntu0~16.04.3
    • 3.5.2-2ubuntu0~16.04.4
    • 3.5.2-2ubuntu0~16.04.5
    • 3.5.2-2ubuntu0~16.04.8
    • 3.5.2-2ubuntu0~16.04.9
    • 3.5.2-2ubuntu0~16.04.10
    • 3.5.2-2ubuntu0~16.04.11
    • 3.5.2-2ubuntu0~16.04.12
    • 3.5.2-2ubuntu0~16.04.13
    Affected ranges
    • ECOSYSTEM: < 3.5.2-2ubuntu0~16.04.13+esm1

    Update to 3.5.2-2ubuntu0~16.04.13+esm1

  • python3.6 Ubuntu:18.04:LTS

    Versions
    • 3.6.3-1ubuntu1
    • 3.6.4~rc1-1
    • 3.6.4~rc1-2
    • 3.6.4-1
    • 3.6.4-2
    • 3.6.4-3build1
    • 3.6.4-4
    • 3.6.5~rc1-1
    • 3.6.5-3
    • 3.6.6-1~18.04
    • 3.6.7-1~18.04
    • 3.6.8-1~18.04.1
    • 3.6.8-1~18.04.2
    • 3.6.8-1~18.04.3
    • 3.6.9-1~18.04
    • 3.6.9-1~18.04ubuntu1
    • 3.6.9-1~18.04ubuntu1.1
    • 3.6.9-1~18.04ubuntu1.3
    • 3.6.9-1~18.04ubuntu1.4
    Affected ranges
    • ECOSYSTEM: < 3.6.9-1~18.04ubuntu1.6

    Update to 3.6.9-1~18.04ubuntu1.6

  • python3.7 Ubuntu:18.04:LTS

    Versions
    • 3.7.0~a2-1
    • 3.7.0~a3-1
    • 3.7.0~a3-2
    • 3.7.0~a3-3
    • 3.7.0~a4-1
    • 3.7.0~b1-1
    • 3.7.0~b1-1build1
    • 3.7.0~b2-1
    • 3.7.0~b3-1
    • 3.7.0-1~18.04
    • 3.7.1-1~18.04
    • 3.7.3-2~18.04.1
    • 3.7.5-2~18.04
    • 3.7.5-2~18.04.4
    Affected ranges
    • ECOSYSTEM: < 3.7.5-2ubuntu1~18.04.2

    Update to 3.7.5-2ubuntu1~18.04.2

  • python3.8 Ubuntu:18.04:LTS

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

    Update to 3.8.0-3ubuntu1~18.04.2

  • 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
    • 3.8.10-0ubuntu1~20.04.1
    Affected ranges
    • ECOSYSTEM: < 3.8.10-0ubuntu1~20.04.2

    Update to 3.8.10-0ubuntu1~20.04.2

  • python3.9 Ubuntu:20.04:LTS

    Versions
    • 3.9.0~rc1-1~20.04
    • 3.9.0-5~20.04
    • 3.9.5-3~20.04.1
    Affected ranges
    • ECOSYSTEM: < 3.9.5-3ubuntu0~20.04.1

    Update to 3.9.5-3ubuntu0~20.04.1

Original sources

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