OpenShift Container Platform 4.11 update for runc

1) Security features bypass

EUVDB-ID: #VU85991

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C]

CVE-ID: CVE-2024-21626

CWE-ID: CWE-254 - Security Features

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to an internal file descriptor leak that can cause a newly-spawned container process (from runc exec) to have a working directory in the host filesystem namespace or a malicious image to allow a container process to gain access to the host filesystem through runc run. A remote attacker can trick the victim into loading a malicious image to bypass sandbox restrictions and execute arbitrary code on the host OS.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat OpenShift Container Platform: 4.11.0 - 4.11.57

runc (Red Hat package): before 1.1.2-3.1.rhaos4.11.el8

openshift-clients (Red Hat package): before 4.11.0-202401122348.p0.gbf40a6c.assembly.stream.el8

kernel-rt (Red Hat package): before 4.18.0-372.91.1.rt7.251.el8_6

cri-o (Red Hat package): before 1.24.6-11.1.rhaos4.11.git07f48d1.el8

kernel (Red Hat package): before 4.18.0-372.91.1.el8_6

External links

http://access.redhat.com/errata/RHSA-2024:0684

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.