USN-4111-1: Ghostscript vulnerabilities

USN-4111-1: Ghostscript vulnerabilities

ghostscript vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

• Ubuntu 19.04
• Ubuntu 18.04 LTS
• Ubuntu 16.04 LTS

Summary

Ghostscript could be made to access arbitrary files if it opened a
specially crafted file.

Software Description

• ghostscript – PostScript and PDF interpreter

Details

Hiroki Matsukuma discovered that the PDF interpreter in Ghostscript
did not properly restrict privileged calls when ‘-dSAFER’
restrictions were in effect. If a user or automated system were
tricked into processing a specially crafted file, a remote attacker
could possibly use this issue to access arbitrary files.
(CVE-2019-14811, CVE-2019-14812, CVE-2019-14813, CVE-2019-14817)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 19.04

ghostscript – 9.26~dfsg+0-0ubuntu7.3

libgs9 – 9.26~dfsg+0-0ubuntu7.3

Ubuntu 18.04 LTS

ghostscript – 9.26~dfsg+0-0ubuntu0.18.04.11

libgs9 – 9.26~dfsg+0-0ubuntu0.18.04.11

Ubuntu 16.04 LTS

ghostscript – 9.26~dfsg+0-0ubuntu0.16.04.11

libgs9 – 9.26~dfsg+0-0ubuntu0.16.04.11

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

In general, a standard system update will make all the necessary changes.

References

• CVE-2019-14811
• CVE-2019-14812
• CVE-2019-14813
• CVE-2019-14817

Source: USN-4111-1: Ghostscript vulnerabilities