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"…

Published 9 y ago 2017-04-19 · modified 4 mo ago 2026-06-17 · JSON

CVSS

7.8

v3.1 · CNA

CISA KEV

not known exploited

EPSS

2.0%

percentile 80%

Public exploits

none known

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.

CISA SSVC assessment

Exploitation: Proof of concept public
Automatable: no
Technical impact: total
Assessed: 2 y ago 2024-04-22

Exploit prediction (EPSS)

1.97% probability of exploitation in the next 30 days, higher than 80% of all scored CVEs.

CVSS scores

Assigned by	Version	Score	Vector
CISA ADP	3.1	7.8	`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`
CNA	3.1	7.8	`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`
NVD	3.0	7.8	`CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`
NVD	2.0	6.8	`AV:N/AC:M/Au:N/C:P/I:P/A:P`

Classification

Weakness

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

git.gnome.org /browse/libcroco/commit/?id=9ad72875e9f08e4c519ef63d44cdbd94aa9504f7 · x_refsource_MISC, x_transferred
security.gentoo.org /glsa/201707-13 · vendor-advisory, x_refsource_GENTOO, x_transferred
openwall.com /lists/oss-security/2017/04/24/2 · x_refsource_MISC, x_transferred
bugzilla.suse.com /show_bug.cgi?id=1034482 · x_refsource_MISC, x_transferred
blogs.gentoo.org /ago/2017/04/17/libcroco-heap-overflow-and-undefined-behavior/ · x_refsource_MISC, x_transferred
lists.opensuse.org /opensuse-security-announce/2019-06/msg00043.html · vendor-advisory, x_refsource_SUSE, x_transferred

Sources

CVE List: CVE-2017-7961
NVD: CVE-2017-7961

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.