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CVE-2021-41099

CVE-2021-41099 · Integer overflow issue with strings 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. An integer overflow bug in the underlying string library can be used to corrupt the heap and potentially result with denial of service or remote code execution. The vulnerability involves changing the default proto-max-bulk-len configuration parameter to a very large value and constructing specially crafted network payloads or commands. The problem is fixed in Redis versions 6.2.6, 6.0.16 and 5.0.14. An additional workaround to mitigate the problem without patching the redis-server executable is to prevent users from modifying the proto-max-bulk-len configuration parameter. This can be done using ACL to restrict unprivileged users from using the CONFIG SET command.

CVSS 7.5 · High · EPSS 3.6% · Fix available

Published
Updated

Stack: system · database

Affected products and versions

  • redis

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