#VU34823 Input validation error in lvm2 - CVE-2020-8991

Vulnerability identifier: #VU34823

Vulnerability risk: Low

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-8991

CWE-ID: CWE-20

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
lvm2
Other software / Other software solutions

Vendor: libffi

Description

The vulnerability allows a local privileged user to perform service disruption.

** DISPUTED ** vg_lookup in daemons/lvmetad/lvmetad-core.c in LVM2 2.02 mismanages memory, leading to an lvmetad memory leak, as demonstrated by running pvs. NOTE: RedHat disputes CVE-2020-8991 as not being a vulnerability since there’s no apparent route to either privilege escalation or to denial of service through the bug.

Mitigation
Install update from vendor's website.

Vulnerable software versions

lvm2: 2.02.00

---

External links
https://sourceware.org/git/?p=lvm2.git;a=commit;h=bcf9556b8fcd16ad8997f80cc92785f295c66701

---

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.