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Gentoo: GLSA-202208-33 Normal: Gnome Shell Denial Of Service

gentoo
Calendar Grey August 20, 2022
Dist Gentoo Esm H88
Alert: Critical security flaws discovered in Gnome Shell, gettext, and libcroco pose risks of denial of service to Gentoo users.
A vulnerability has been found in libcroco which could result in denial of service.

Summary

The cr_parser_parse_any_core function in libcroco's cr-parser.c does not limit recursion, leading to a denial of service via a stack overflow when trying to parse crafted CSS. Gnome Shell and gettext bundle libcroco in their own sources and thus are potentially vulnerable as well.

Topics%20covered

Topics Covered

security advisory denial of service gentoo normal severity gettext libcroco gnome shell

Resolution

All gettext users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=sys-devel/gettext-0.21"
All Gnome Shell users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=gnome-base/gnome-shell-3.36.7"
All libcroco users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=dev-libs/libcroco-0.6.13"

References

[ 1 ] CVE-2020-12825 https://nvd.nist.gov/vuln/detail/CVE-2020-12825

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/202208-33
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Concerns

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.

Severity: Normal
Title: Gnome Shell, gettext, libcroco: Multiple Vulnerabilities
Date: August 21, 2022
Bugs: #722752, #755848, #769998
ID: 202208-33

Topics%20covered

Topics Covered

security advisory denial of service gentoo normal severity gettext libcroco gnome shell

Synopsis

A vulnerability has been found in libcroco which could result in denial of service.

Background

GNOME Shell provides core user interface functions for the GNOME desktop, like switching to windows and launching applications. gettext contains the GNU locale utilities.
libcroco is a standalone CSS2 parsing and manipulation library.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 dev-libs/libcroco < 0.6.13 >= 0.6.13 2 gnome-base/gnome-shell < 3.36.7 >= 3.36.7 3 sys-devel/gettext < 0.21 >= 0.21

Impact

===== An attacker with control over the input to the library can cause a denial of service.

Workaround

There is no known workaround at this time.

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