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CVE-2021-32626

CVE-2021-32626 · Lua scripts can overflow the heap-based Lua stack in Redis

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

Redis is an open source, in-memory database that persists on disk. In affected versions specially crafted Lua scripts executing in Redis can cause the heap-based Lua stack to be overflowed, due to incomplete checks for this condition. This can result with heap corruption and potentially remote code execution. This problem exists in all versions of Redis with Lua scripting support, starting from 2.6. The problem is fixed in versions 6.2.6, 6.0.16 and 5.0.14. For users unable to update an additional workaround to mitigate the problem without patching the redis-server executable is to prevent users from executing Lua scripts. This can be done using ACL to restrict EVAL and EVALSHA commands.

CVSS 7.5 · High · EPSS 16.2% · Fix available

Published
Updated

Stack: system · database

Affected products and versions

  • redis

    Versions
    • >= 6.2.0, < 6.2.6: Affected
    • >= 6.0.0, < 6.0.16: Affected
    • >= 2.6.0, < 5.0.14: Affected

    No fix published

  • redis Debian:12

    Affected ranges
    • ECOSYSTEM: < 5:6.0.16-1

    Update to 5:6.0.16-1

  • redis Debian:13

    Affected ranges
    • ECOSYSTEM: < 5:6.0.16-1

    Update to 5:6.0.16-1

  • redis Debian:14

    Affected ranges
    • ECOSYSTEM: < 5:6.0.16-1

    Update to 5:6.0.16-1

  • redis Ubuntu:Pro:14.04:LTS

    Versions
    • 2:2.6.13-1
    • 2:2.6.16-3
    • 2:2.8.0-1
    • 2:2.8.2-1
    • 2:2.8.4-2
    • 2:2.8.4-2ubuntu0.2
    • 2:2.8.4-2ubuntu0.2+esm1
    Affected ranges
    • ECOSYSTEM: < 2:2.8.4-2ubuntu0.2+esm2

    Update to 2:2.8.4-2ubuntu0.2+esm2

  • redis Ubuntu:Pro:16.04:LTS

    Versions
    • 2:3.0.3-3
    • 2:3.0.5-1
    • 2:3.0.5-2
    • 2:3.0.5-3
    • 2:3.0.5-4
    • 2:3.0.6-1
    • 2:3.0.6-1ubuntu0.2
    • 2:3.0.6-1ubuntu0.3
    • 2:3.0.6-1ubuntu0.4
    Affected ranges
    • ECOSYSTEM: < 2:3.0.6-1ubuntu0.4+esm1

    Update to 2:3.0.6-1ubuntu0.4+esm1

  • redis Ubuntu:Pro:18.04:LTS

    Versions
    • 4:4.0.1-7
    • 4:4.0.2-6
    • 4:4.0.2-9
    • 5:4.0.5-1
    • 5:4.0.6-1
    • 5:4.0.6-2
    • 5:4.0.7-1
    • 5:4.0.8-1
    • 5:4.0.8-2
    • 5:4.0.9-1
    • 5:4.0.9-1ubuntu0.1
    • 5:4.0.9-1ubuntu0.2
    • 5:4.0.9-1ubuntu0.2+esm2
    Affected ranges
    • ECOSYSTEM: < 5:4.0.9-1ubuntu0.2+esm3

    Update to 5:4.0.9-1ubuntu0.2+esm3

  • redis Ubuntu:Pro:20.04:LTS

    Versions
    • 5:5.0.5-2build1
    • 5:5.0.6-1
    • 5:5.0.7-1
    • 5:5.0.7-2
    • 5:5.0.7-2ubuntu0.1~esm1
    • 5:5.0.7-2ubuntu0.1
    Affected ranges
    • ECOSYSTEM: < 5:5.0.7-2ubuntu0.1+esm1

    Update to 5:5.0.7-2ubuntu0.1+esm1

Original sources

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