TI-2017-05564 Aliases CVE-2017-7961 GHSA-w464-8qjc-r5gx

The cr_tknzr_parse_rgb function in cr-tknzr.c in libcroco 0.6.11 and 0.6.12 has an…

HIGH 69CWE-119Published 2017-04-19 · Updated 2024-08-05

Key facts

Attack vector: Local
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-119 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.01966 80th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:gnome:libcroco:0.6.11:::::::*	0.6.11	Vulnerable	GNOME
cpe:2.3:a:gnome:libcroco:0.6.12:::::::*	0.6.12	Vulnerable	GNOME

cpe:2.3:a:gnome:libcroco:0.6.11:*:*:*:*:*:*:* Versions 0.6.11 Vulnerable ·GNOME
cpe:2.3:a:gnome:libcroco:0.6.12:*:*:*:*:*:*:* Versions 0.6.12 Vulnerable ·GNOME

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux 5	Affected	No fix planned: Will not fix
Red Hat Enterprise Linux 6	Affected	No fix planned: Will not fix
Red Hat Enterprise Linux 7	Affected	No fix planned: Will not fix
Red Hat Enterprise Linux 9	Affected	No fix yet

Timeline

2026-10-02 Threatist record created from CVE-2017-7961
2026-10-03 Alias added: GHSA-w464-8qjc-r5gx

References

Exploit 1

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

Patch 3

Advisory 2

TI-2017-06379 The cr_parser_parse_selector_core function in cr-parser.c in libcroco 0.6.12 allows… CVSS 3.1MEDIUM 6.5
TI-2020-10193 libcroco through 0.6.13 has excessive recursion in cr_parser_parse_any_core in… CVSS 3.1HIGH 7.1
TI-2017-06342 The cr_tknzr_parse_comment function in cr-tknzr.c in libcroco 0.6.12 allows remote… CVSS 3.1MEDIUM 6.5
TI-2017-05563 The cr_input_new_from_uri function in cr-input.c in libcroco 0.6.11 and 0.6.12 allows… CVSS 3.0MEDIUM 5.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences