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CVE-2020-15703

4.0 · MEDIUM

There is no input validation on the Locale property in an apt transaction.

Published Oct 31, 2020CWE-22EPSS 0.49%

Overview

CVE-2020-15703 is a medium-severity vulnerability. It was published on October 31, 2020 and has a CVSS 3.1 base score of 4.0 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 4.0, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refubuntu.com/security/notices/USN-4537-1Refwww.eyecontrol.nl/blog/the-story-of-3-cves-in-ubuntu-desktop.htmlRefubuntu.com/security/notices/USN-4537-1Refwww.eyecontrol.nl/blog/the-story-of-3-cves-in-ubuntu-desktop.html

How CyberStrike helps

Frequently asked questions

What is CVE-2020-15703?

CVE-2020-15703 is a medium-severity vulnerability. It was published on October 31, 2020 and has a CVSS 3.1 base score of 4.0 (MEDIUM).

How severe is CVE-2020-15703?

This vulnerability has a CVSS 3.1 base score of 4.0, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2020-15703?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2020-15703?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-15703 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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