Path Traversal in Aptdaemon Project
CVE-2020-15703
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (39.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 39.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000
Affected products
- Aptdaemon Project — versions 1.1.1
- Canonical Aptdaemon — versions unspecified
Weakness classification (CWE)
References
- www.eyecontrol.nl/blog/the-story-of-3-cves-in-ubuntu-desktop.html (Exploit, Third Party Advisory)
- ubuntu.com/security/notices/USN-4537-1 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-15703?
- CVE-2020-15703 is a medium-severity vulnerability in Aptdaemon Project, classified under Path Traversal. CVSS score: 4.0/10. Published 2020-10-31.
- How severe is CVE-2020-15703?
- Medium severity. CVSS v3 base score is 4.0 out of 10.