Incorrect regular expression in IBM Cloud Pak System

1) Incorrect Regular Expression

EUVDB-ID: #VU63700

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-29060

CWE-ID: CWE-185 - Incorrect Regular Expression

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient input validation when the application is provided and checks a crafted invalid HWB string. A remote attacker can pass specially crafted data to the application and perform regular expression denial of service (ReDos) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM Cloud Pak System: 2.3.3.0 - 2.3.3.4

CPE2.3

• cpe:2.3:a:ibm_corporation:ibm_cloud_pak_system:2.3.3.0:*:*:*:*:*:*:*
• cpe:2.3:a:ibm_corporation:ibm_cloud_pak_system:2.3.3.1:*:*:*:*:*:*:*
• cpe:2.3:a:ibm_corporation:ibm_cloud_pak_system:2.3.3.2:*:*:*:*:*:*:*

External links

https://www.ibm.com/blogs/psirt/security-bulletin-vulnerability-in-node-js-color-string-affects-ibm-cloud-pak-system-cve-2021-29060/
https://www.ibm.com/support/pages/node/6829097

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.