CVE-2021-32762

Name	CVE-2021-32762
Description	Redis is an open source, in-memory database that persists on disk. The redis-cli command line tool and redis-sentinel service may be vulnerable to integer overflow when parsing specially crafted large multi-bulk network replies. This is a result of a vulnerability in the underlying hiredis library which does not perform an overflow check before calling the calloc() heap allocation function. This issue only impacts systems with heap allocators that do not perform their own overflow checks. Most modern systems do and are therefore not likely to be affected. Furthermore, by default redis-sentinel uses the jemalloc allocator which is also not vulnerable. The problem is fixed in Redis versions 6.2.6, 6.0.16 and 5.0.14.
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-833w-8v3m-8wwr