CVE-2021-32626

NameCVE-2021-32626
DescriptionRedis 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-2810-1, DSA-5001-1, ELA-512-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
redis (PTS)jessie, jessie (lts)2:2.8.17-1+deb8u10fixed
stretch (security), stretch (lts), stretch3:3.2.6-3+deb9u9fixed
buster, buster (security)5:5.0.14-1+deb10u2fixed
bullseye (security), bullseye5:6.0.16-1+deb11u2fixed
sid, bookworm5:7.0.5-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
redissourcejessie2:2.8.17-1+deb8u9ELA-512-1
redissourcestretch3:3.2.6-3+deb9u8DLA-2810-1
redissourcebuster5:5.0.14-1+deb10u1DSA-5001-1
redissourcebullseye5:6.0.16-1+deb11u1DSA-5001-1
redissource(unstable)5:6.0.16-1

Notes

https://github.com/redis/redis/security/advisories/GHSA-p486-xggp-782c

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