CVE-2021-34549

NameCVE-2021-34549
DescriptionAn issue was discovered in Tor before 0.4.6.5, aka TROVE-2021-005. Hashing is mishandled for certain retrieval of circuit data. Consequently. an attacker can trigger the use of an attacker-chosen circuit ID to cause algorithm inefficiency.
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)
ReferencesDSA-4932-1
Debian Bugs990000

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
tor (PTS)buster0.3.5.16-1fixed
buster (security)0.3.5.16-1+deb10u1fixed
bullseye (security), bullseye0.4.5.16-1fixed
bookworm, sid0.4.7.13-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
torsourcestretch(unfixed)end-of-life
torsourcebuster0.3.5.15-1DSA-4932-1
torsource(unstable)0.4.5.9-1990000

Notes

[stretch] - tor <end-of-life> (See DSA 4644)
https://blog.torproject.org/node/2041
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