SB2021120218 - Resource exhaustion in IBM Cloud Pak for Multicloud Management
Published: December 2, 2021
Security Bulletin ID
SB2021120218
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Resource exhaustion (CVE-ID: CVE-2020-11612)
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.
Remediation
Install update from vendor's website.
References
- https://www.ibm.com/blogs/psirt/security-bulletin-ibm-cloud-pak-for-multicloud-management-monitoring-has-applied-security-fixes-for-its-use-of-netty-io/"
- https://www.ibm.com/blogs/psirt/security-bulletin-ibm-cloud-pak-for-multicloud-management-monitoring-has-applied-security-fixes-for-its-use-of-netty-io/</a><br>
- https://www.ibm.com/support/pages/node/6520782<br></p>