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AUSCERT External Security Bulletin Redistribution
ESB-2021.0222
USN-4700-1: PyXDG vulnerability
20 January 2021
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AusCERT Security Bulletin Summary
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Product: PyXDG
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2019-12761
Reference: ESB-2019.2125
Original Bulletin:
https://ubuntu.com/security/notices/USN-4700-1
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USN-4700-1: PyXDG vulnerability
19 January 2021
PyXDG could be made to run programs as your login if it received specially
crafted input.
Releases
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
o Ubuntu 14.04 ESM
Packages
o pyxdg - python library to access freedesktop.org standards
Details
Alexandre D'Hondt discovered that PyXDG did not properly sanitize input.
An attacker could exploit this with a crafted .menu file to execute
arbitrary code.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 18.04
o python-xdg - 0.25-4ubuntu1.1
o python3-xdg - 0.25-4ubuntu1.1
Ubuntu 16.04
o python-xdg - 0.25-4ubuntu0.16.04.1
o python3-xdg - 0.25-4ubuntu0.16.04.1
Ubuntu 14.04
o python-xdg - 0.25-4ubuntu0.14.04.1~esm1
o python3-xdg - 0.25-4ubuntu0.14.04.1~esm1
In general, a standard system update will make all the necessary changes.
References
o CVE-2019-12761
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