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AUSCERT External Security Bulletin Redistribution
ESB-2021.0114
USN-4649-2: xdg-utils regression
13 January 2021
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AusCERT Security Bulletin Summary
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Product: xdg-utils
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Access Confidential Data -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2020-27748
Reference: ESB-2020.4204
Original Bulletin:
https://ubuntu.com/security/notices/USN-4649-2
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USN-4649-2: xdg-utils regression
12 January 2021
USN-4649-1 introduced a regression in xdg-utils.
Releases
o Ubuntu 20.10
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Packages
o xdg-utils - desktop integration utilities from freedesktop.org
Details
USN-4649-1 fixed vulnerabilities in xdg-utils. That update caused a regression
by removing the --attach functionality in thunderbird and others applications.
This update fix the problem by reverting these changes.
Original advisory details:
Jens Mueller discovered that xdg-utils incorrectly handled certain URI.
An attacker could possibly use this issue to expose sensitive information.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 20.10
o xdg-utils - 1.1.3-2ubuntu1.20.10.2
Ubuntu 20.04
o xdg-utils - 1.1.3-2ubuntu1.20.04.2
Ubuntu 18.04
o xdg-utils - 1.1.2-1ubuntu2.5
Ubuntu 16.04
o xdg-utils - 1.1.1-1ubuntu1.16.04.5
In general, a standard system update will make all the necessary changes.
References
o https://launchpad.net/bugs/1909941
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