CVE-2017-7961

NameCVE-2017-7961
Description** DISPUTED ** The cr_tknzr_parse_rgb function in cr-tknzr.c in libcroco 0.6.11 and 0.6.12 has an "outside the range of representable values of type long" undefined behavior issue, which might allow remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a crafted CSS file. NOTE: third-party analysis reports "This is not a security issue in my view. The conversion surely is truncating the double into a long value, but there is no impact as the value is one of the RGB components."
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-909-1
NVD severitymedium (attack range: remote)
Debian Bugs860961

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
libcroco (PTS)wheezy0.6.6-2vulnerable
wheezy (security)0.6.6-2+deb7u1fixed
jessie0.6.8-3vulnerable
stretch0.6.11-3fixed
buster, sid0.6.12-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
libcrocosource(unstable)0.6.11-3medium860961
libcrocosourcewheezy0.6.6-2+deb7u1mediumDLA-909-1

Notes

[jessie] - libcroco <no-dsa> (Minor issue; will be fixed via point release)
https://blogs.gentoo.org/ago/2017/04/17/libcroco-heap-overflow-and-undefined-behavior/
https://git.gnome.org/browse/libcroco/commit/?id=9ad72875e9f08e4c519ef63d44cdbd94aa9504f7

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