Multiple vulnerabilities in IBM Cloud Kubernetes Service

Published: 2023-06-13

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2023-28642 CVE-2023-27561
CWE-ID	CWE-281 CWE-284
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Cloud Kubernetes Service Other software / Other software solutions
Vendor	IBM Corporation

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Improper Preservation of Permissions

EUVDB-ID: #VU74193

Risk: Medium

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

CVE-ID: CVE-2023-28642

CWE-ID: CWE-281 - Improper preservation of permissions

Exploit availability: No

Description

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

The vulnerability exists due to improper preservation of permissions in the AppArmor and SELinux when /proc inside the container is symlinked with a specific mount configuration. A remote attacker can gain access to the target application.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Cloud Kubernetes Service: before 1.26.5_1538

CPE2.3

External links

http://www.ibm.com/support/pages/node/7001317

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.

2) Improper access control

EUVDB-ID: #VU74190

Risk: Low

CVSSv3.1: 6.1 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-27561

CWE-ID: CWE-284 - Improper Access Control