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.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
| Link | Tags |
|---|---|
| https://git.gnome.org/browse/libcroco/commit/?id=9ad72875e9f08e4c519ef63d44cdbd94aa9504f7 | patch third party advisory issue tracking |
| https://security.gentoo.org/glsa/201707-13 | third party advisory vendor advisory |
| http://openwall.com/lists/oss-security/2017/04/24/2 | patch mailing list third party advisory |
| https://bugzilla.suse.com/show_bug.cgi?id=1034482 | patch third party advisory issue tracking |
| https://blogs.gentoo.org/ago/2017/04/17/libcroco-heap-overflow-and-undefined-behavior/ | patch third party advisory exploit |
| http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00043.html | vendor advisory |