Improper Verification of Cryptographic Signature in IBM Cloud Pak for Multicloud Management Managed Services

1) Improper Verification of Cryptographic Signature

EUVDB-ID: #VU65749

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-24771

CWE-ID: CWE-347 - Improper Verification of Cryptographic Signature

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass security restrictions.

The vulnerability exists due to a improper signature verification when checking the digestAlgorithm structure. A remote unauthenticated attacker can use a specially-crafted structure to steal padding bytes and use unchecked portion of the PKCS#1 encoded message to exploit this vulnerability and forge a signature when a low public exponent is being used.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM Cloud Pak for Multicloud Management: 1.1.0 - 2.3.4

External links

http://www.ibm.com/support/pages/node/6606581

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.