CVE-2017-7961

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.

CVSS v3.1 CNA

7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v3.0 NVD

7.8 HIGHCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v2.0 NVD

6.8 MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P

EPSS

1.97% chance of exploitation in the next 30 days, 80th percentile

Published

2017-04-19

Updated

2024-08-05

Proof-of-concept exploits (1)

• https://blogs.gentoo.org/ago/2017/04/17/libcroco-heap-overflow-and-undefined-behavior/

Security advisories

• 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
• https://git.gnome.org/browse/libcroco/commit/?id=9ad72875e9f08e4c519ef63d44cdbd94aa9504f7
• https://security.gentoo.org/glsa/201707-13

References

• CVE Record
• NVD entry