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AUSCERT External Security Bulletin Redistribution
ESB-2021.0912
USN-4764-1: GLib vulnerability
16 March 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: GLib
Publisher: Ubuntu
Operating System: Ubuntu
Linux variants
Impact/Access: Create Arbitrary Files -- Unknown/Unspecified
Resolution: Patch/Upgrade
CVE Names: CVE-2021-28153
Original Bulletin:
https://ubuntu.com/security/notices/USN-4764-1
Comment: This advisory references vulnerabilities in products which run on
platforms other than Ubuntu. It is recommended that administrators
running GLib check for an updated version of the software for their
operating system.
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USN-4764-1: GLib vulnerability
15 March 2021
GLib could be made to create files if it opened a specially crafted
archive.
Releases
o Ubuntu 20.10
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Packages
o glib2.0 - GLib library of C routines
Details
It was discovered that GLib incorrectly handled certain symlinks when
replacing files. If a user or automated system were tricked into extracting
a specially crafted file with File Roller, a remote attacker could possibly
create files outside of the intended directory.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 20.10
o libglib2.0-0 - 2.66.1-2ubuntu0.2
Ubuntu 20.04
o libglib2.0-0 - 2.64.6-1~ubuntu20.04.3
Ubuntu 18.04
o libglib2.0-0 - 2.56.4-0ubuntu0.18.04.8
Ubuntu 16.04
o libglib2.0-0 - 2.48.2-0ubuntu4.8
In general, a standard system update will make all the necessary changes.
References
o CVE-2021-28153
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