Denial of service in Platform Navigator and Automation Assets in IBM Cloud Pak for Integration

1) Input validation error

EUVDB-ID: #VU64805

Risk: Medium

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

CVE-ID: CVE-2021-43565

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of user-supplied input when parsing a Signer to ServerConfig.AddHostKey in cases where the Signer passed to AddHostKey does not implement AlgorithmSigner or the Signer passed to AddHostKey returns a key of type “ssh-rsa” from its PublicKey method. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Platform Navigator in IBM Cloud Pak for Integration (CP4I): 2020.4.1 - 2021.4.1

Automation Assets in IBM Cloud Pak for Integration (CP4I): 2020.4.1 - 2021.4.1

External links

http://www.ibm.com/blogs/psirt/security-bulletin-platform-navigator-and-automation-assets-in-ibm-cloud-pak-for-integration-are-vulnerable-to-denial-of-service-due-to-go-cve-2021-43565/
http://www.ibm.com/support/pages/node/6610869

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.