CVE-2019-3694

A Symbolic Link (Symlink) Following vulnerability in the packaging of munin in openSUSE Factory, Leap 15.1 allows local attackers to escalate from user munin to root. This issue affects: openSUSE Factory munin version 2.0.49-4.2 and prior versions. openSUSE Leap 15.1 munin version 2.0.40-lp151.1.1 and prior versions.

Weakness

The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

Affected Software

Potential Mitigations

• Follow the principle of least privilege when assigning access rights to entities in a software system.
• Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/132.html
• https://cwe.mitre.org/data/definitions/17.html
• https://cwe.mitre.org/data/definitions/35.html
• https://cwe.mitre.org/data/definitions/76.html

References

• https://bugzilla.suse.com/show_bug.cgi?id=1155078