CVE-2021-32921

NameCVE-2021-32921
DescriptionAn issue was discovered in Prosody before 0.11.9. It does not use a constant-time algorithm for comparing certain secret strings when running under Lua 5.2 or later. This can potentially be used in a timing attack to reveal the contents of secret strings to an attacker.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
ReferencesDLA-2687-1, DSA-4916-1
Debian Bugs988668

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
prosody (PTS)buster, buster (security)0.11.2-1+deb10u4fixed
bullseye (security), bullseye0.11.9-2+deb11u2fixed
bookworm, sid0.12.3-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
prosodysourcestretch0.9.12-2+deb9u3DLA-2687-1
prosodysourcebuster0.11.2-1+deb10u1DSA-4916-1
prosodysource(unstable)0.11.9-1988668

Notes

https://www.openwall.com/lists/oss-security/2021/05/13/1
https://prosody.im/security/advisory_20210512.txt
https://hg.prosody.im/trunk/rev/c98aebe601f9
https://hg.prosody.im/trunk/rev/13b84682518e
https://hg.prosody.im/trunk/rev/6f56170ea986
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