cve/2017/CVE-2017-7961.md

CVE-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."

POC

Reference

• http://openwall.com/lists/oss-security/2017/04/24/2
• https://blogs.gentoo.org/ago/2017/04/17/libcroco-heap-overflow-and-undefined-behavior/
• https://bugzilla.suse.com/show_bug.cgi?id=1034482

Github

• https://github.com/andir/nixos-issue-db-example