USN-5224-1: Ghostscript vulnerabilities

Releases

• Ubuntu 21.10
• Ubuntu 21.04
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM

Packages

• 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

• ghostscript - 9.50~dfsg-5ubuntu4.5
• libgs9 - 9.50~dfsg-5ubuntu4.5

Ubuntu 18.04

• 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

• CVE-2021-45944
• CVE-2021-45949

Related notices

• USN-5224-2: libgs9-common, libgs9, ghostscript-doc, ghostscript, ghostscript-x, libgs-dev