CVE-2021-3402 : Vulnerability Insights and Analysis
Learn about CVE-2021-3402, a vulnerability in YARA that could lead to denial of service or information disclosure. Find out how to mitigate the risks and secure your systems.
An integer overflow and several buffer overflow reads in libyara/modules/macho/macho.c in YARA v4.0.3 and earlier could allow an attacker to either cause denial of service or information disclosure via a malicious Mach-O file.
Understanding CVE-2021-3402
This CVE affects all versions before libyara 4.0.4 and is classified under CWE-190.
What is CVE-2021-3402?
CVE-2021-3402 is a vulnerability in libyara that leads to denial of service or information disclosure through a malicious Mach-O file.
The Impact of CVE-2021-3402
The vulnerability could be exploited by an attacker to disrupt services or expose sensitive information on systems running affected versions of YARA.
Technical Details of CVE-2021-3402
The following technical details provide insights into the vulnerability.
Vulnerability Description
The vulnerability involves an integer overflow and multiple buffer overflow reads in libyara/modules/macho/macho.c, impacting YARA v4.0.3 and prior versions.
Affected Systems and Versions
All versions of YARA before libyara 4.0.4 are affected by this vulnerability.
Exploitation Mechanism
The exploit could occur through crafted Mach-O files, allowing attackers to trigger denial of service or extract sensitive data.
Mitigation and Prevention
To address CVE-2021-3402, consider the following mitigation strategies.
Immediate Steps to Take
Immediately update YARA to version 4.0.4 or later to eliminate the vulnerability in libyara.
Long-Term Security Practices
Regularly monitor security mailing lists and vendor advisories for updates on YARA and other software components to stay informed about potential vulnerabilities.
Patching and Updates
Apply security patches promptly and maintain a robust patch management process to ensure that systems are always protected from known vulnerabilities.