CVE-2020-15703

low-risk
Published 2020-10-31

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.

Do I need to act?

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0.04% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.0/10 Medium
LOCAL / LOW complexity

Affected Products (3)

Aptdaemon
Aptdaemon
Aptdaemon

Affected Vendors

Aptdaemon Project

References (4)

Patch https://ubuntu.com/security/notices/USN-4537-1
Exploit https://www.eyecontrol.nl/blog/the-story-of-3-cves-in-ubuntu-desktop.html
Patch https://ubuntu.com/security/notices/USN-4537-1
Exploit https://www.eyecontrol.nl/blog/the-story-of-3-cves-in-ubuntu-desktop.html
23
/ 100
low-risk
Severity 14/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 9/34 · Low