CVE-2018-0490

NameCVE-2018-0490
DescriptionAn issue was discovered in Tor before 0.2.9.15, 0.3.1.x before 0.3.1.10, and 0.3.2.x before 0.3.2.10. The directory-authority protocol-list subprotocol implementation allows remote attackers to cause a denial of service (NULL pointer dereference and directory-authority crash) via a misformatted relay descriptor that is mishandled during voting.
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-4183-1
NVD severitymedium (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
tor (PTS)jessie (security), jessie0.2.5.16-1fixed
stretch0.2.9.16-1fixed
stretch (security)0.2.9.15-1fixed
buster0.3.4.9-5fixed
sid0.3.4.9-7fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
torsource(unstable)0.3.2.10-1medium
torsourcejessie(not affected)
torsourcestretch0.2.9.15-1mediumDSA-4183-1
torsourcewheezy(not affected)

Notes

[jessie] - tor <not-affected> (Vulnerable code introduced after tor-0.2.9.4-alpha)
[wheezy] - tor <not-affected> (Vulnerable code introduced after tor-0.2.9.4-alpha)
https://trac.torproject.org/projects/tor/ticket/25074
https://blog.torproject.org/new-stable-tor-releases-security-fixes-and-dos-prevention-03210-03110-02915
https://gitweb.torproject.org/tor.git/commit/?id=65f2eec694f18a64291cc85317b9f22dacc1d8e4

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