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AUSCERT External Security Bulletin Redistribution
USN-4764-1: GLib vulnerability
16 March 2021
AusCERT Security Bulletin Summary
Operating System: Ubuntu
Impact/Access: Create Arbitrary Files -- Unknown/Unspecified
CVE Names: CVE-2021-28153
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
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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
o Ubuntu 20.10
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
o glib2.0 - GLib library of C routines
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.
The problem can be corrected by updating your system to the following package
o libglib2.0-0 - 2.66.1-2ubuntu0.2
o libglib2.0-0 - 2.64.6-1~ubuntu20.04.3
o libglib2.0-0 - 2.56.4-0ubuntu0.18.04.8
o libglib2.0-0 - 2.48.2-0ubuntu4.8
In general, a standard system update will make all the necessary changes.
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