CVE-2021-32000

A UNIX Symbolic Link (Symlink) Following vulnerability in the clone-master-clean-up.sh script of clone-master-clean-up in SUSE Linux Enterprise Server 12 SP3, SUSE Linux Enterprise Server 15 SP1; openSUSE Factory allows local attackers to delete arbitrary files. This issue affects: SUSE Linux Enterprise Server 12 SP3 clone-master-clean-up version 1.6-4.6.1 and prior versions. SUSE Linux Enterprise Server 15 SP1 clone-master-clean-up version 1.6-3.9.1 and prior versions. openSUSE Factory clone-master-clean-up version 1.6-1.4 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=1181050