CVE-2021-32628

NameCVE-2021-32628
DescriptionRedis 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDSA-5001-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
redis (PTS)bullseye5:6.0.16-1+deb11u2fixed
bullseye (security)5:6.0.16-1+deb11u3fixed
bookworm, bookworm (security)5:7.0.15-1~deb12u1fixed
sid, trixie5:7.0.15-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
redissourcebuster5:5.0.14-1+deb10u1DSA-5001-1
redissourcebullseye5:6.0.16-1+deb11u1DSA-5001-1
redissource(unstable)5:6.0.16-1

Notes

[stretch] - redis <ignored> (Minor issue; invasive patch)
https://github.com/redis/redis/security/advisories/GHSA-vw22-qm3h-49pr

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