CVE-2021-45429 : Exploit Details and Defense Strategies

A Buffer Overflow vulnerability in VirusTotal YARA git commit: 605b2edf07ed8eb9a2c61ba22eb2e7c362f47ba7 via yr_set_configuration in yara/libyara/libyara.c could lead to a Denial of Service.

Understanding CVE-2021-45429

This CVE identifies a specific vulnerability in VirusTotal YARA that can potentially result in a Denial of Service attack.

What is CVE-2021-45429?

The CVE-2021-45429 is a Buffer Overflow vulnerability found in VirusTotal YARA, specifically in the git commit: 605b2edf07ed8eb9a2c61ba22eb2e7c362f47ba7 through yr_set_configuration in yara/libyara/libyara.c. This vulnerability has the potential to cause a Denial of Service.

The Impact of CVE-2021-45429

Exploitation of this vulnerability could allow attackers to conduct Denial of Service attacks, disrupting the availability of the affected system and potentially leading to downtime and service unavailability.

Technical Details of CVE-2021-45429

This section provides more technical insights into the CVE-2021-45429 vulnerability.

Vulnerability Description

The vulnerability stems from a Buffer Overflow issue within VirusTotal YARA, specifically in the code related to yr_set_configuration in yara/libyara/libyara.c.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions: Not applicable

Exploitation Mechanism

The vulnerability can be exploited by crafting specific inputs that trigger the Buffer Overflow condition in the YARA module, potentially leading to a Denial of Service scenario.

Mitigation and Prevention

To address CVE-2021-45429 and enhance overall security, follow these mitigation strategies:

Immediate Steps to Take

Monitor for security advisories related to VirusTotal YARA.
Apply security patches or updates provided by the vendor.

Long-Term Security Practices

Employ secure coding practices to prevent Buffer Overflow vulnerabilities.
Conduct regular security assessments and audits of the systems.

Patching and Updates

Stay informed about security updates and patches released by VirusTotal YARA.
Apply relevant patches promptly to mitigate the risk associated with this vulnerability.