CVE-2021-35942 : Vulnerability Insights and Analysis
Discover the details of CVE-2021-35942, a vulnerability in the GNU C Library (glibc) through version 2.33. Learn about the impact, affected systems, exploitation, and mitigation strategies.
A vulnerability has been discovered in the GNU C Library (glibc) through version 2.33, known as CVE-2021-35942. This vulnerability in the wordexp function could lead to a denial of service or disclosure of information when exploited. Here's what you need to know about this CVE.
Understanding CVE-2021-35942
This section delves into the details of CVE-2021-35942.
What is CVE-2021-35942?
The wordexp function in the GNU C Library (glibc) through 2.33 may crash or read arbitrary memory in parse_param when called with an untrusted, crafted pattern. The vulnerability can potentially result in a denial of service or information disclosure, primarily due to incorrect calculations.
The Impact of CVE-2021-35942
The impact of this vulnerability includes the possibility of a denial of service or the disclosure of sensitive information when exploited by an attacker.
Technical Details of CVE-2021-35942
In this section, we will explore the technical aspects of CVE-2021-35942.
Vulnerability Description
The vulnerability in the wordexp function of glibc could crash or read arbitrary memory when a malicious pattern is provided, potentially leading to denial of service or information disclosure.
Affected Systems and Versions
The affected systems include GNU C Library versions up to 2.33, emphasizing the importance of updating to a secure version to prevent exploitation.
Exploitation Mechanism
The vulnerability can be exploited by providing a crafted pattern to the wordexp function, causing it to crash or read arbitrary memory due to incorrect calculations.
Mitigation and Prevention
Discover how to mitigate and prevent the risks associated with CVE-2021-35942.
Immediate Steps to Take
Immediate steps involve updating glibc to a secure version and ensuring that untrusted patterns are not passed to the wordexp function.
Long-Term Security Practices
Implementing secure coding practices, regular security audits, and staying updated on security advisories are crucial for long-term security.
Patching and Updates
Regularly applying patches and updates released by the GNU C Library and related vendors is essential to address security vulnerabilities in the software.