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CVE-2021-32628

CVE-2021-32628 · Vulnerability in handling large ziplists

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. An integer overflow bug in the ziplist data structure used by all versions of Redis can be exploited to corrupt the heap and potentially result with remote code execution. The vulnerability involves modifying the default ziplist configuration parameters (hash-max-ziplist-entries, hash-max-ziplist-value, zset-max-ziplist-entries or zset-max-ziplist-value) to a very large value, and then constructing specially crafted commands to create very large ziplists. The problem is fixed in Redis versions 6.2.6, 6.0.16, 5.0.14. An additional workaround to mitigate the problem without patching the redis-server executable is to prevent users from modifying the above configuration parameters. This can be done using ACL to restrict unprivileged users from using the CONFIG SET command.

CVSS 7.5 · High · EPSS 13.5% · 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
    • < 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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