CVE-2021-33461 Explained : Impact and Mitigation
Uncover the details of CVE-2021-33461, a use-after-free vulnerability in yasm version 1.3.0 impacting yasm_intnum_destroy() function. Learn about its impact, affected systems, mitigation steps, and preventive measures.
A detailed analysis of CVE-2021-33461, a use-after-free vulnerability discovered in yasm version 1.3.0, affecting the yasm_intnum_destroy() function in libyasm/intnum.c.
Understanding CVE-2021-33461
This section provides insights into the nature and impact of the CVE-2021-33461 vulnerability.
What is CVE-2021-33461?
The vulnerability was found in yasm version 1.3.0, specifically in the yasm_intnum_destroy() function within libyasm/intnum.c. It is classified as a use-after-free issue.
The Impact of CVE-2021-33461
The use-after-free vulnerability in yasm could potentially allow an attacker to execute arbitrary code or cause a denial of service by leveraging this flaw.
Technical Details of CVE-2021-33461
In this section, we delve into the technical aspects of the CVE-2021-33461 vulnerability.
Vulnerability Description
The issue arises due to a use-after-free bug in the yasm_intnum_destroy() function, enabling attackers to manipulate memory allocation to execute malicious code.
Affected Systems and Versions
The vulnerability affects yasm version 1.3.0, with the specific use-after-free found in the yasm_intnum_destroy() function in libyasm/intnum.c.
Exploitation Mechanism
Attackers can exploit this vulnerability by crafting a special sequence leading to the use-after-free condition, potentially gaining unauthorized access or disrupting system functionality.
Mitigation and Prevention
This section outlines the necessary steps to mitigate the risks posed by CVE-2021-33461.
Immediate Steps to Take
Users are advised to update yasm to a patched version and apply relevant security fixes to prevent exploitation of the use-after-free vulnerability.
Long-Term Security Practices
Implementing secure coding practices, conducting regular security audits, and staying informed about software vulnerabilities can help enhance overall cybersecurity posture.
Patching and Updates
Stay vigilant for patches released by the software vendor to address CVE-2021-33461 and promptly apply these updates to secure your systems.