Privilege escalation in cri-o

1) Incorrect default permissions

EUVDB-ID: #VU62796

Risk: Low

CVSSv3.1: 6.2 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-27652

CWE-ID: CWE-276 - Incorrect Default Permissions

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to containers are incorrectly started with non-empty default permissions within in Moby (Docker Engine). An attacker with access to programs with inheritable file capabilities can elevate those capabilities to the permitted set when execve(2) runs.

Mitigation

Install update from vendor's website.

Vulnerable software versions

CRI-O: 0.0.0 - 1.23.2

External links

http://github.com/cri-o/cri-o/security/advisories/GHSA-4hj2-r2pm-3hc6
http://bugzilla.redhat.com/show_bug.cgi?id=2066839

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.