CVE-2021-29361 Explained : Impact and Mitigation

A buffer overflow vulnerability in FORMATS!Read_Utah_RLE+0x340 of Irfanview 4.57 allows attackers to execute arbitrary code via a crafted RLE file.

Understanding CVE-2021-29361

This CVE-2021-29361 vulnerability involves a buffer overflow in Irfanview 4.57, which can be exploited by threat actors to run malicious code using a specially crafted RLE file.

What is CVE-2021-29361?

The CVE-2021-29361 vulnerability pertains to Irfanview 4.57 and specifically targets the FORMATS!Read_Utah_RLE function, enabling attackers to trigger a buffer overflow scenario.

The Impact of CVE-2021-29361

The impact of CVE-2021-29361 is severe as it allows malicious actors to execute arbitrary code on the affected systems, potentially leading to unauthorized access, data theft, or system compromise.

Technical Details of CVE-2021-29361

The technical details of CVE-2021-29361 involve a buffer overflow in the FORMATS!Read_Utah_RLE function of Irfanview 4.57, which can be exploited by cybercriminals to achieve code execution through a crafted RLE file.

Vulnerability Description

The vulnerability arises due to insufficient bounds checking in the FORMATS!Read_Utah_RLE function, leading to a buffer overflow condition that can be leveraged for malicious purposes.

Affected Systems and Versions

Irfanview 4.57 is affected by this vulnerability, and systems running this specific version are at risk of exploitation if exposed to crafted RLE files.

Exploitation Mechanism

By sending a specially crafted RLE file to the vulnerable FORMATS!Read_Utah_RLE function in Irfanview 4.57, threat actors can trigger a buffer overflow, gaining the ability to execute arbitrary code.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-29361, immediate actions should be taken to secure the affected systems and prevent potential exploitation.

Immediate Steps to Take

Users are advised to update Irfanview to a patched version, apply security updates promptly, and avoid opening RLE files from untrusted or unknown sources.

Long-Term Security Practices

Implementing secure coding practices, regularly updating software, and maintaining a proactive security posture are essential for safeguarding systems against buffer overflow vulnerabilities.

Patching and Updates

Keeping Irfanview and other software up to date with the latest security patches and fixes is crucial to mitigate the risk of buffer overflow attacks.