CVE-2020-15703 — MEDIUM (4.0)

Vulnerability Description

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.

CVSS Score

4.0

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Aptdaemon Project	Aptdaemon	1.1.1

Related Weaknesses (CWE)

CWE-22

References

https://ubuntu.com/security/notices/USN-4537-1PatchThird Party Advisory
https://www.eyecontrol.nl/blog/the-story-of-3-cves-in-ubuntu-desktop.htmlExploitThird Party Advisory
https://ubuntu.com/security/notices/USN-4537-1PatchThird Party Advisory
https://www.eyecontrol.nl/blog/the-story-of-3-cves-in-ubuntu-desktop.htmlExploitThird Party Advisory

FAQ

What is CVE-2020-15703?

CVE-2020-15703 is a vulnerability with a CVSS score of 4.0 (MEDIUM). 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...

How severe is CVE-2020-15703?

CVE-2020-15703 has been rated MEDIUM with a CVSS base score of 4.0/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2020-15703?

Check the references section above for vendor advisories and patch information. Affected products include: Aptdaemon Project Aptdaemon.