#VU68560 UNIX symbolic link following in clone-master-clean-up - CVE-2021-32000

Vulnerability identifier: #VU68560

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-32000

CWE-ID: CWE-61

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
clone-master-clean-up
Operating systems & Components / Operating system package or component

Vendor: SUSE

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a symlink following issue in the clone-master-clean-up.sh script of clone-master-clean-up. A local user can create a specially crafted symbolic link to a critical file on the system and delete it, causing a denial of service.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

clone-master-clean-up: before 1.8-150100.3.14.1

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External links
https://bugzilla.suse.com/show_bug.cgi?id=1181050

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.