Use-after-free in GhostPDL - CVE-2021-45944

Vulnerability identifier: #VU59316

CSH Severity: High

CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-45944

CWE-ID: CWE-416

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 use-after-free error within the sampled_data_sample() function, called from sampled_data_continue and interp. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger a use-after-free error and execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

GhostPDL
ghostscript (Debian package)
libgs9 (Ubuntu package)
ghostscript (Ubuntu package)
ghostscript-help
ghostscript-debuginfo
ghostscript-debugsource
ghostscript-tools-dvipdf
ghostscript-devel
ghostscript
ghostscript-x11-debuginfo
ghostscript-x11
SUSE Linux Enterprise Software Development Kit
SUSE Linux Enterprise Server
SUSE Linux Enterprise Realtime Extension
SUSE Linux Enterprise Module for Basesystem
Ubuntu
openEuler

Install updates from vendor's website.

GhostPDL - update to 9.54.0
ghostscript (Debian package) - addressed in versions 9.27~dfsg-2+deb10u5, 9.53.3~dfsg-7+deb11u2
libgs9 (Ubuntu package) - addressed in versions 9.26~dfsg+00ubuntu0.16.04.14+esm1, 9.26~dfsg+0-0ubuntu0.18.04.15, 9.50~dfsg-5ubuntu4.5, 9.53.3~dfsg-7ubuntu0.2, 9.54.0~dfsg1-0ubuntu2.1
ghostscript (Ubuntu package) - addressed in versions 9.26~dfsg+00ubuntu0.16.04.14+esm1, 9.26~dfsg+0-0ubuntu0.18.04.15, 9.50~dfsg-5ubuntu4.5, 9.53.3~dfsg-7ubuntu0.2, 9.54.0~dfsg1-0ubuntu2.1
ghostscript-help - update to 9.52-5
ghostscript-debuginfo - update to 9.52-5
ghostscript-debugsource - update to 9.52-5
ghostscript-tools-dvipdf - update to 9.52-5
ghostscript-devel - update to 9.52-5
ghostscript - update to 9.52-5
ghostscript-x11-debuginfo - addressed in versions 9.52-23.48.1, 9.52-161.1
ghostscript-debugsource - addressed in versions 9.52-23.48.1, 9.52-161.1
ghostscript-devel - addressed in versions 9.52-23.48.1, 9.52-161.1
ghostscript - addressed in versions 9.52-23.48.1, 9.52-161.1
ghostscript-x11 - addressed in versions 9.52-23.48.1, 9.52-161.1
ghostscript-debuginfo - addressed in versions 9.52-23.48.1, 9.52-161.1

• https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=29903
• https://github.com/google/oss-fuzz-vulns/blob/main/vulns/ghostscript/OSV-2021-237.yaml

• Use-after-free in Ghostscript GhostPDL
• Debian update for ghostscript
• SUSE update for ghostscript
• SUSE update for ghostscript
• Ubuntu update for ghostscript
• Ubuntu update for ghostscript
• SUSE update for ghostscript
• openEuler update for ghostscript