Out-of-bounds write in LibSass - CVE-2022-43357

Vulnerability identifier: #VU84725

CSH Severity: High

CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2022-43357

CWE-ID: CWE-787

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input within the Sass::CompoundSelector::has_real_parent_ref() function. A remote attacker can pass specially crafted input to the application, trigger an out-of-bounds write and execute arbitrary code on the target system.

LibSass
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 15
SUSE Manager Server
SUSE Manager Retail Branch Server
SUSE Manager Proxy
SUSE Linux Enterprise Micro
Fedora
SUSE Package Hub 15
openSUSE Leap
openEuler
python-qtsass
python-libsass
libsass
libsass-debuginfo
libsass-debugsource
libsass-devel
libsass-3_6_5-1-debuginfo
libsass-3_6_5-1

Install updates from vendor's website.

LibSass - update to 3.6.6
python-qtsass - update to 0.4.0-4.el9
python-libsass - update to 0.23.0-2.el9
libsass - update to 3.6.4-2
libsass-debuginfo - update to 3.6.4-2
libsass-debugsource - update to 3.6.4-2
libsass-devel - update to 3.6.4-2
libsass-debugsource - update to 3.6.5-150200.4.10.1
libsass-3_6_5-1-debuginfo - update to 3.6.5-150200.4.10.1
libsass-devel - update to 3.6.5-150200.4.10.1
libsass-3_6_5-1 - update to 3.6.5-150200.4.10.1
libsass - update to 3.6.6-1.el9

• https://github.com/sass/libsass/issues/3177
• https://drive.google.com/file/d/1aC5q3czen0atI91fuBIoCBFkS30_OSWX/

• Multiple vulnerabilities in LibSass
• SUSE update for libsass
• openEuler update for libsass
• openEuler 22.03 LTS SP3 update for libsass
• Fedora EPEL 9 update for libsass, python-libsass, python-qtsass