CVE-2021-29763 : Security Advisory and Response
Learn about CVE-2021-29763 affecting IBM Db2 for Linux, UNIX and Windows 11.1 and 11.5. Find out how a local user can exploit this vulnerability, leading to a denial of service attack. Take immediate steps to mitigate the risk.
CVE-2021-29763 was published on September 15, 2021, affecting IBM Db2 for Linux, UNIX and Windows versions 11.1 and 11.5. The vulnerability, under specific conditions, could allow a local user to run a procedure causing the system to run out of memory, leading to a denial of service attack.
Understanding CVE-2021-29763
This section provides insights into the nature and impact of CVE-2021-29763.
What is CVE-2021-29763?
The vulnerability in IBM Db2 for Linux, UNIX and Windows versions 11.1 and 11.5 allows a local user to execute a procedure that could exhaust system memory, resulting in a denial of service.
The Impact of CVE-2021-29763
The impact is rated as 'MEDIUM' with a base score of 5.1. The availability impact is 'HIGH', as the local user can trigger a denial of service attack under specific conditions.
Technical Details of CVE-2021-29763
This section delves into the specifics of the vulnerability.
Vulnerability Description
Under certain conditions, IBM Db2 for Linux, UNIX and Windows 11.1 and 11.5 allows a local user to exploit the system, causing it to exhaust memory resources, leading to a denial of service.
Affected Systems and Versions
IBM Db2 for Linux, UNIX and Windows versions 11.1 and 11.5 are impacted by this vulnerability.
Exploitation Mechanism
The vulnerability can be exploited by a local user running a specific procedure to exhaust system memory, thereby causing a denial of service.
Mitigation and Prevention
In this section, we discuss steps to mitigate and prevent exploitation of CVE-2021-29763.
Immediate Steps to Take
IBM recommends applying official fixes to address the vulnerability immediately. Users should also monitor system resources to detect unusual memory consumption.
Long-Term Security Practices
Maintaining up-to-date security patches and access controls, along with regular security audits, can help prevent and detect similar vulnerabilities in the future.
Patching and Updates
Regularly check for security updates and patches released by IBM for Db2 for Linux, UNIX, and Windows to address known vulnerabilities.