Security restrictions bypass in Keepalived

1) Improper access control

EUVDB-ID: #VU66814

Risk: Low

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

CVE-ID: CVE-2021-44225

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a local user to bypass implemented security restrictions.

The vulnerability exists due to the D-Bus policy does not sufficiently restrict the message destination. A local user can inspect and manipulate any property in the message and bypass implemented security restrictions.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Keepalived: 2.0.0 - 2.2.4

CPE2.3

• cpe:2.3:a:keepalived:keepalived:2.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:keepalived:keepalived:2.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:keepalived:keepalived:2.0.2:*:*:*:*:*:*:*

External links

https://github.com/acassen/keepalived/commit/7977fec0be89ae6fe87405b3f8da2f0b5e415e3d
https://github.com/acassen/keepalived/pull/2063
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5226RYNMNB7FL4MSJDIBBGPUWH6LMRYV/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6O2R6EXURJQFPFPYFWRCZLUYVWQCLSZM/

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.