CVE-2021-39535 : What You Need to Know
Discover the CVE-2021-39535 vulnerability in libxsmm through version 1.16.1-93, leading to a NULL pointer dereference in JIT code allowing Denial of Service attacks. Learn about impacts and mitigation.
This article provides details about CVE-2021-39535, focusing on an issue discovered in libxsmm through version 1.16.1-93, leading to a NULL pointer dereference in JIT code and enabling a Denial of Service attack.
Understanding CVE-2021-39535
This section delves into the critical aspects of CVE-2021-39535.
What is CVE-2021-39535?
CVE-2021-39535 is an issue identified in libxsmm through version 1.16.1-93, involving a NULL pointer dereference in JIT code that can be exploited for a Denial of Service attack.
The Impact of CVE-2021-39535
The vulnerability allows an attacker to trigger a Denial of Service attack by exploiting the NULL pointer dereference in the JIT code of libxsmm.
Technical Details of CVE-2021-39535
In this section, we explore the technical specifics of CVE-2021-39535.
Vulnerability Description
A NULL pointer dereference vulnerability exists in the JIT code of libxsmm through version 1.16.1-93, leading to the potential for a Denial of Service attack.
Affected Systems and Versions
- Affected Systems: Not applicable
- Affected Versions: All versions of libxsmm through v1.16.1-93
Exploitation Mechanism
The CVE-2021-39535 vulnerability can be exploited by an attacker to execute a Denial of Service attack leveraging the NULL pointer dereference in the JIT code.
Mitigation and Prevention
This section offers mitigation strategies and preventive measures for CVE-2021-39535.
Immediate Steps to Take
- Update libxsmm to a patched version that addresses the NULL pointer dereference vulnerability.
- Employ proper input validation techniques to prevent malicious user input that could trigger the exploit.
Long-Term Security Practices
- Regularly monitor and apply security updates for all software components, including libxsmm.
- Conduct security audits and code reviews to catch vulnerabilities early in the development process.
Patching and Updates
Ensure timely patching and updates for libxsmm to mitigate the CVE-2021-39535 vulnerability and protect against potential Denial of Service attacks.