Resource exhaustion in IBM Cloud Pak for Multicloud Management

1) Resource exhaustion

EUVDB-ID: #VU27513

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-2020-11612

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The vulnerability exists due to application does not properly control consumption of internal resources within ZlibDecoders in Netty while decoding a ZlibEncoded byte stream. A remote attacker can trigger resource exhaustion by passing an overly large ZlibEncoded byte stream to the Netty server, forcing the server to allocate all of its free memory to a single decoder.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM Cloud Pak for Multicloud Management: 2.3.0 - 2.3.20

External links

http://www.ibm.com/blogs/psirt/security-bulletin-ibm-cloud-pak-for-multicloud-management-monitoring-has-applied-security-fixes-for-its-use-of-netty-io/
http://www.ibm.com/support/pages/node/6520782

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.