Privilege escalation in OpenShift Container Platform

1) Incorrect default permissions

EUVDB-ID: #VU25999

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-19355

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 incorrect default permissions for "/etc/passwd" file after modification in the "openshift/ocp-release-operator-sdk". A local user with access to the system can modify the file and escalate privileges on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Red Hat OpenShift Container Platform: 4.1.0 - 4.2.22

CPE2.3

• cpe:2.3:a:red_hat:red_hat_openshift_container_platform:4.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:red_hat:red_hat_openshift_container_platform:4.1.2:*:*:*:*:*:*:*
• cpe:2.3:a:red_hat:red_hat_openshift_container_platform:4.1.3:*:*:*:*:*:*:*
• cpe:2.3:a:red_hat:red_hat_openshift_container_platform:4.1.4:*:*:*:*:*:*:*
• cpe:2.3:a:red_hat:red_hat_openshift_container_platform:4.1.6:*:*:*:*:*:*:*
• cpe:2.3:a:red_hat:red_hat_openshift_container_platform:4.1.7:*:*:*:*:*:*:*
• cpe:2.3:a:red_hat:red_hat_openshift_container_platform:4.1.8:*:*:*:*:*:*:*
• cpe:2.3:a:red_hat:red_hat_openshift_container_platform:4.1.9:*:*:*:*:*:*:*
• cpe:2.3:a:red_hat:red_hat_openshift_container_platform:4.1.11:*:*:*:*:*:*:*
• cpe:2.3:a:red_hat:red_hat_openshift_container_platform:4.1.13:*:*:*:*:*:*:*

External links

https://access.redhat.com/security/cve/CVE-2019-19355
https://bugzilla.redhat.com/show_bug.cgi?id=1793277

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.