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CVE-2021-26690

CVE-2021-26690 · mod_session NULL pointer dereference

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

Apache HTTP Server versions 2.4.0 to 2.4.46 A specially crafted Cookie header handled by mod_session can cause a NULL pointer dereference and crash, leading to a possible Denial Of Service

CVSS 7.5 · High · EPSS 65.3% · Fix available

Published
Updated

Stack: system · web

Affected products and versions

  • apache httpd

    Versions
    • 2.4.46: Affected
    • 2.4.43: Affected
    • 2.4.41: Affected
    • 2.4.39: Affected
    • 2.4.38: Affected
    • 2.4.37: Affected
    • 2.4.35: Affected
    • 2.4.34: Affected
    • 2.4.33: Affected
    • 2.4.29: Affected
    • 2.4.28: Affected
    • 2.4.27: Affected
    • 2.4.26: Affected
    • 2.4.25: Affected
    • 2.4.23: Affected
    • 2.4.20: Affected
    • 2.4.18: Affected
    • 2.4.17: Affected
    • 2.4.16: Affected
    • 2.4.12: Affected
    • 2.4.10: Affected
    • 2.4.9: Affected
    • 2.4.7: Affected
    • 2.4.6: Affected
    • 2.4.4: Affected
    • 2.4.3: Affected
    • 2.4.2: Affected
    • 2.4.1: Affected
    • 2.4.0: Affected

    No fix published

  • apache2 Debian:12

    Affected ranges
    • ECOSYSTEM: < 2.4.46-6

    Update to 2.4.46-6

  • apache2 Debian:13

    Affected ranges
    • ECOSYSTEM: < 2.4.46-6

    Update to 2.4.46-6

  • apache2 Debian:14

    Affected ranges
    • ECOSYSTEM: < 2.4.46-6

    Update to 2.4.46-6

  • apache2 Ubuntu:Pro:14.04:LTS

    Versions
    • 2.4.6-2ubuntu2
    • 2.4.6-2ubuntu3
    • 2.4.6-2ubuntu4
    • 2.4.7-1ubuntu1
    • 2.4.7-1ubuntu2
    • 2.4.7-1ubuntu3
    • 2.4.7-1ubuntu4
    • 2.4.7-1ubuntu4.1
    • 2.4.7-1ubuntu4.4
    • 2.4.7-1ubuntu4.5
    • 2.4.7-1ubuntu4.6
    • 2.4.7-1ubuntu4.7
    • 2.4.7-1ubuntu4.8
    • 2.4.7-1ubuntu4.9
    • 2.4.7-1ubuntu4.10
    • 2.4.7-1ubuntu4.11
    • 2.4.7-1ubuntu4.13
    • 2.4.7-1ubuntu4.15
    • 2.4.7-1ubuntu4.16
    • 2.4.7-1ubuntu4.17
    • 2.4.7-1ubuntu4.18
    • 2.4.7-1ubuntu4.19
    • 2.4.7-1ubuntu4.20
    • 2.4.7-1ubuntu4.21
    • 2.4.7-1ubuntu4.22
    Affected ranges
    • ECOSYSTEM: < 2.4.7-1ubuntu4.22+esm1

    Update to 2.4.7-1ubuntu4.22+esm1

  • apache2 Ubuntu:Pro:16.04:LTS

    Versions
    • 2.4.12-2ubuntu2
    • 2.4.17-1ubuntu1
    • 2.4.17-2ubuntu1
    • 2.4.17-3ubuntu1
    • 2.4.18-1ubuntu1
    • 2.4.18-2ubuntu1
    • 2.4.18-2ubuntu2
    • 2.4.18-2ubuntu3
    • 2.4.18-2ubuntu3.1
    • 2.4.18-2ubuntu3.2
    • 2.4.18-2ubuntu3.3
    • 2.4.18-2ubuntu3.4
    • 2.4.18-2ubuntu3.5
    • 2.4.18-2ubuntu3.7
    • 2.4.18-2ubuntu3.8
    • 2.4.18-2ubuntu3.9
    • 2.4.18-2ubuntu3.10
    • 2.4.18-2ubuntu3.12
    • 2.4.18-2ubuntu3.13
    • 2.4.18-2ubuntu3.14
    • 2.4.18-2ubuntu3.15
    • 2.4.18-2ubuntu3.17
    Affected ranges
    • ECOSYSTEM: < 2.4.18-2ubuntu3.17+esm1

    Update to 2.4.18-2ubuntu3.17+esm1

  • apache2 Ubuntu:18.04:LTS

    Versions
    • 2.4.27-2ubuntu3
    • 2.4.29-1ubuntu1
    • 2.4.29-1ubuntu2
    • 2.4.29-1ubuntu3
    • 2.4.29-1ubuntu4
    • 2.4.29-1ubuntu4.1
    • 2.4.29-1ubuntu4.2
    • 2.4.29-1ubuntu4.3
    • 2.4.29-1ubuntu4.4
    • 2.4.29-1ubuntu4.5
    • 2.4.29-1ubuntu4.6
    • 2.4.29-1ubuntu4.7
    • 2.4.29-1ubuntu4.8
    • 2.4.29-1ubuntu4.10
    • 2.4.29-1ubuntu4.11
    • 2.4.29-1ubuntu4.12
    • 2.4.29-1ubuntu4.13
    • 2.4.29-1ubuntu4.14
    Affected ranges
    • ECOSYSTEM: < 2.4.29-1ubuntu4.16

    Update to 2.4.29-1ubuntu4.16

  • apache2 Ubuntu:20.04:LTS

    Versions
    • 2.4.41-1ubuntu1
    • 2.4.41-4ubuntu1
    • 2.4.41-4ubuntu2
    • 2.4.41-4ubuntu3
    • 2.4.41-4ubuntu3.1
    Affected ranges
    • ECOSYSTEM: < 2.4.41-4ubuntu3.3

    Update to 2.4.41-4ubuntu3.3

Original sources

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