DescriptionThe rend_service_intro_established function in or/rendservice.c in Tor before, 0.2.9.x before, 0.3.0.x before, 0.3.1.x before, and 0.3.2.x before, when SafeLogging is disabled, allows attackers to obtain sensitive information by leveraging access to the log files of a hidden service, because uninitialized stack data is included in an error message about construction of an introduction point circuit.
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)
Debian Bugs876221

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
tor (PTS)buster, buster (security)
bullseye (security), bullseye0.4.5.10-1~deb11u1fixed
bookworm, sid0.4.7.11-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
torsourcewheezy(not affected)
torsourcejessie(not affected)


[jessie] - tor <not-affected> (Issue introduced in
[wheezy] - tor <not-affected> (Issue introduced in

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