MEDIUM4.0
PYSEC-2026-783
aptdaemon Information Disclosure via Improper Input Validation in Transaction class
Quick fix
PYSEC-2026-783 — aptdaemon: upgrade to the fixed version with the command below.
pip install --upgrade 'aptdaemon>=1.1.1'Details
There is no input validation on the Locale property in an apt transaction. An unprivileged user can supply a full path to a writable directory, which lets aptd read a file as root. Having a symlink in place results in an error message if the file exists, and no error otherwise. This way an unprivileged user can check for the existence of any files on the system as root.
Are you affected?
Enter the version of the package you're using.
Affected packages
References
- https://nvd.nist.gov/vuln/detail/CVE-2020-15703[ADVISORY]
- https://bugs.launchpad.net/ubuntu/+source/aptdaemon/+bug/1888235[WEB]
- https://github.com/linuxmint/aptdaemon[PACKAGE]
- https://github.com/linuxmint/aptdaemon/blob/4d24cb61575ac6fbee8d5e61ef933e6093ee0a2e/debian/patches/CVE-2020-15703.patch[WEB]
- https://ubuntu.com/security/notices/USN-4537-1[WEB]
- https://www.eyecontrol.nl/blog/the-story-of-3-cves-in-ubuntu-desktop.html[WEB]
- https://pypi.org/project/aptdaemon[PACKAGE]
- https://github.com/advisories/GHSA-wpmr-q825-x4c6[ADVISORY]