CVE-2021-32627

NameCVE-2021-32627
DescriptionRedis is an open source, in-memory database that persists on disk. In affected versions an integer overflow bug in Redis can be exploited to corrupt the heap and potentially result with remote code execution. The vulnerability involves changing the default proto-max-bulk-len and client-query-buffer-limit configuration parameters to very large values and constructing specially crafted very large stream elements. The problem is fixed in Redis 6.2.6, 6.0.16 and 5.0.14. For users unable to upgrade an additional workaround to mitigate the problem without patching the redis-server executable is to prevent users from modifying the proto-max-bulk-len configuration parameter. This can be done using ACL to restrict unprivileged users from using the CONFIG SET command.
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)
ReferencesDSA-5001-1
NVD severitymedium

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+deb9u9vulnerable
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
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 <no-dsa> (Minor issue; invasive patch)
https://github.com/redis/redis/security/advisories/GHSA-f434-69fm-g45v

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