DescriptionMozilla Network Security Services (NSS) before 3.12.3, Firefox before 3.0.13, Thunderbird before, and SeaMonkey before 1.1.18 do not properly handle a '\0' character in a domain name in the subject's Common Name (CN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority. NOTE: this was originally reported for Firefox before 3.5.
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-1874-1, DSA-2025-1
NVD severitymedium (attack range: remote)
Debian Bugs539934

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
icedove (PTS)wheezy38.7.0-1~deb7u1fixed
wheezy (security)1:52.3.0-4~deb7u2fixed
jessie (security)1:52.3.0-4~deb8u2fixed
stretch (security), stretch1:52.3.0-4~deb9u1fixed
nss (PTS)wheezy2:3.14.5-1+deb7u5fixed
wheezy (security)2:3.26-1+debu7u5fixed
jessie (security), jessie2:3.26-1+debu8u3fixed
stretch (security), stretch2:3.26.2-1.1+deb9u1fixed
buster, sid2:3.35-2fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs

Search for package or bug name: Reporting problems