CVE-2021-32762

NameCVE-2021-32762
DescriptionRedis 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.
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
NVD severityhigh

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
redis (PTS)stretch3:3.2.6-3+deb9u3vulnerable
stretch (security)3:3.2.6-3+deb9u9fixed
buster5:5.0.3-4+deb10u3vulnerable
buster (security)5:5.0.14-1+deb10u1fixed
bullseye5:6.0.15-1vulnerable
bullseye (security)5:6.0.16-1+deb11u1fixed
bookworm, sid5:6.0.16-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
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-833w-8v3m-8wwr

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