CVE-2021-29795 : What You Need to Know
Learn about CVE-2021-29795 impacting IBM PowerVM Hypervisor versions FW860, FW930, FW940, and FW950. Understand the severity, impact, and necessary mitigation steps.
IBM PowerVM Hypervisor versions FW860, FW930, FW940, and FW950 are susceptible to a vulnerability that could allow a local user to trigger a system crash by executing a specially crafted sequence of hypervisor calls. This CVE was published on September 20, 2021, with a CVSS base score of 6.0.
Understanding CVE-2021-29795
This section delves into the details of the CVE-2021-29795 vulnerability affecting IBM PowerVM Hypervisor.
What is CVE-2021-29795?
The vulnerability in IBM PowerVM Hypervisor versions FW860, FW930, FW940, and FW950 enables a local user to exploit a specific sequence of hypervisor calls from a partition to crash the system. The IBM X-Force ID associated with this vulnerability is 203557.
The Impact of CVE-2021-29795
With a CVSS base score of 6.0, this medium-severity vulnerability poses a high availability impact, allowing a local user with high privileges to disrupt system availability.
Technical Details of CVE-2021-29795
This section outlines the technical aspects of CVE-2021-29795, including the vulnerability description, affected systems, and the exploitation mechanism.
Vulnerability Description
The flaw in IBM PowerVM Hypervisor versions FW860, FW930, FW940, and FW950 permits a local user to execute a crafted series of hypervisor calls leading to a system crash.
Affected Systems and Versions
The impacted systems include IBM PowerVM Hypervisor versions FW860, FW930, FW940, and FW950.
Exploitation Mechanism
An attacker needs local access with high privileges to exploit this vulnerability by triggering a sequence of hypervisor calls.
Mitigation and Prevention
Discover the necessary steps to mitigate and prevent exploitation of CVE-2021-29795.
Immediate Steps to Take
Immediately apply the official fix provided by IBM to address the vulnerability in affected versions of IBM PowerVM Hypervisor.
Long-Term Security Practices
Enhance security posture by following best practices such as regular security assessments, access control measures, and system monitoring.
Patching and Updates
Stay updated with security patches and advisories from IBM to protect systems from known vulnerabilities and exploits.