DescriptionHeap-based buffer overflow in Mozilla Thunderbird before and SeaMonkey before 1.0.3 allows remote attackers to cause a denial of service (crash) via a VCard attachment with a malformed base64 field, which copies more data than expected due to an integer underflow.
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)
NVD severitymedium (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
thunderbird (PTS)wheezy (security)1:52.6.0-1~deb7u1fixed
jessie (security)1:52.6.0-1~deb8u1fixed
stretch (security), stretch1:52.6.0-1~deb9u1fixed
buster, sid1:52.6.0-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
mozillasourcesarge(not affected)
mozilla-firefoxsource(unstable)(not affected)
mozilla-thunderbirdsource(unstable)(not affected)


- mozilla-firefox <not-affected> (only firefox >= 1.5)
[sarge] - mozilla <not-affected> (mozilla 1.7 not affected)
- mozilla-thunderbird <not-affected> (high)

Search for package or bug name: Reporting problems