[USN-5224-1] Ghostscript vulnerabilities

========================================================================== Ubuntu Security Notice USN-5224-1 January 12, 2022
ghostscript vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 21.10 – Ubuntu 21.04 – Ubuntu 20.04 LTS – Ubuntu 18.04 LTS
Summary:
Several security issues were fixed in Ghostscript.
Software Description: – ghostscript: PostScript and PDF interpreter
Details:
It was discovered that Ghostscript incorrectly handled certain PostScript files. If a user or automated system were tricked into processing a specially crafted file, a remote attacker could possibly use this issue to cause Ghostscript to crash, resulting in a denial of service, or possibly execute arbitrary code.
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 21.10: ghostscript 9.54.0~dfsg1-0ubuntu2.1 libgs9 9.54.0~dfsg1-0ubuntu2.1
Ubuntu 21.04: ghostscript 9.53.3~dfsg-7ubuntu0.2 libgs9 9.53.3~dfsg-7ubuntu0.2
Ubuntu 20.04 LTS: ghostscript 9.50~dfsg-5ubuntu4.5 libgs9 9.50~dfsg-5ubuntu4.5
Ubuntu 18.04 LTS: ghostscript 9.26~dfsg+0-0ubuntu0.18.04.15 libgs9 9.26~dfsg+0-0ubuntu0.18.04.15
In general, a standard system update will make all the necessary changes.
References: ubuntu.com/security/notices/USN-5224-1 CVE-2021-45944, CVE-2021-45949
Package Information: launchpad.net/ubuntu/+source/ghostscript/9.54.0~dfsg1-0ubuntu2.1 launchpad.net/ubuntu/+source/ghostscript/9.53.3~dfsg-7ubuntu0.2 launchpad.net/ubuntu/+source/ghostscript/9.50~dfsg-5ubuntu4.5 launchpad.net/ubuntu/+source/ghostscript/9.26~dfsg+0-0ubuntu0.18.04.15