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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.97%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 1.97% probability · 79th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- gnome/libcroco
- Source
- cve@mitre.org
References
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00043.html
- http://openwall.com/lists/oss-security/2017/04/24/2Mailing List, Patch, Third Party Advisory
- https://blogs.gentoo.org/ago/2017/04/17/libcroco-heap-overflow-and-undefined-behavior/Exploit, Patch, Third Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1034482Issue Tracking, Patch, Third Party Advisory
- https://git.gnome.org/browse/libcroco/commit/?id=9ad72875e9f08e4c519ef63d44cdbd94aa9504f7Issue Tracking, Patch, Third Party Advisory
- https://security.gentoo.org/glsa/201707-13Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00043.html
- http://openwall.com/lists/oss-security/2017/04/24/2Mailing List, Patch, Third Party Advisory
- https://blogs.gentoo.org/ago/2017/04/17/libcroco-heap-overflow-and-undefined-behavior/Exploit, Patch, Third Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1034482Issue Tracking, Patch, Third Party Advisory
- https://git.gnome.org/browse/libcroco/commit/?id=9ad72875e9f08e4c519ef63d44cdbd94aa9504f7Issue Tracking, Patch, Third Party Advisory
- https://security.gentoo.org/glsa/201707-13Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.