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AUSCERT External Security Bulletin Redistribution
ESB-2019.3284
USN-4111-1: Ghostscript vulnerabilities
29 August 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: Ghostscript
Publisher: Ubuntu
Operating System: Ubuntu
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Access Confidential Data -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2019-14817 CVE-2019-14813 CVE-2019-14812
CVE-2019-14811
Original Bulletin:
https://usn.ubuntu.com/4111-1/
Comment: This advisory references vulnerabilities in the Linux kernel that
also affect distributions other than Ubuntu. It is recommended that
administrators running Linux check for an updated version of the
kernel for their system.
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USN-4111-1: Ghostscript vulnerabilities
29 August 2019
ghostscript vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 19.04
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Summary
Ghostscript could be made to access arbitrary files if it opened a specially
crafted file.
Software Description
o 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
o CVE-2019-14811
o CVE-2019-14812
o CVE-2019-14813
o CVE-2019-14817
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