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AUSCERT External Security Bulletin Redistribution
ESB-2021.0085
USN-4686-1: Ghostscript vulnerabilities
8 January 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: Ghostscript
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote with User Interaction
Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-27845 CVE-2020-27843 CVE-2020-27842
CVE-2020-27841 CVE-2020-27824 CVE-2020-27814
CVE-2020-8112 CVE-2020-6851 CVE-2018-5727
Reference: ESB-2020.2361
ESB-2020.0664
ESB-2020.0372
Original Bulletin:
https://ubuntu.com/security/notices/USN-4686-1
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USN-4686-1: Ghostscript vulnerabilities
07 January 2021
Several security issues were fixed in Ghostscript.
Releases
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Packages
o ghostscript - PostScript and PDF interpreter
Details
It was discovered that Ghostscript incorrectly handled certain image
files. If a user or automated system were tricked into processing a
specially crafted file, a remote attacker could 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 18.04
o ghostscript - 9.26~dfsg+0-0ubuntu0.18.04.14
o libgs9 - 9.26~dfsg+0-0ubuntu0.18.04.14
Ubuntu 16.04
o ghostscript - 9.26~dfsg+0-0ubuntu0.16.04.14
o libgs9 - 9.26~dfsg+0-0ubuntu0.16.04.14
In general, a standard system update will make all the necessary changes.
References
o CVE-2020-27842
o CVE-2020-27845
o CVE-2020-27814
o CVE-2020-27841
o CVE-2020-6851
o CVE-2020-27824
o CVE-2020-27843
o CVE-2020-8112
o CVE-2018-5727
Related notices
o USN-4685-1 : openjpeg2, libopenjpip7, libopenjp2-7, libopenjp3d7
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