CVE-2021-32626

Name	CVE-2021-32626
Description	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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-2810-1, DSA-5001-1, ELA-512-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
redis (PTS)	jessie, jessie (lts)	2:2.8.17-1+deb8u12	fixed
	stretch (security)	3:3.2.6-3+deb9u9	fixed
	stretch (lts), stretch	3:3.2.6-3+deb9u12	fixed
	buster (security), buster, buster (lts)	5:5.0.14-1+deb10u5	fixed
	bullseye	5:6.0.16-1+deb11u2	fixed
	bullseye (security)	5:6.0.16-1+deb11u3	fixed
	bookworm (security), bookworm	5:7.0.15-1~deb12u1	fixed
	sid, trixie	5:7.0.15-2	fixed

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

Package	Type	Release	Fixed Version	Origin
redis	source	jessie	2:2.8.17-1+deb8u9	ELA-512-1
redis	source	stretch	3:3.2.6-3+deb9u8	DLA-2810-1
redis	source	buster	5:5.0.14-1+deb10u1	DSA-5001-1
redis	source	bullseye	5:6.0.16-1+deb11u1	DSA-5001-1
redis	source	(unstable)	5:6.0.16-1

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