CVE-2021-26476 Explained : Impact and Mitigation

This article provides insights into CVE-2021-26476, a vulnerability found in EPrints 3.4.2 that allows remote attackers to execute OS commands through crafted LaTeX input to a specific URI.

Understanding CVE-2021-26476

CVE-2021-26476 is a security flaw that enables threat actors to run arbitrary OS commands by manipulating LaTeX input within a particular URI.

What is CVE-2021-26476?

The CVE-2021-26476 vulnerability exists in EPrints 3.4.2, permitting malicious individuals to execute unauthorized OS commands through the exploitation of LaTeX input in a designated URI.

The Impact of CVE-2021-26476

This vulnerability poses a severe risk as attackers can abuse it to gain unauthorized access, execute arbitrary commands, and potentially compromise the system's integrity and confidentiality.

Technical Details of CVE-2021-26476

CVE-2021-26476 allows threat actors to execute commands outside the application's scope, leading to significant security implications.

Vulnerability Description

EPrints 3.4.2 suffers from a security loophole that enables remote attackers to execute operating system commands by injecting malicious LaTeX input through a specific URI, namely cgi/cal?year=.

Affected Systems and Versions

The vulnerability impacts EPrints version 3.4.2, potentially exposing all instances of this version to exploitation from cyber threats.

Exploitation Mechanism

Threat actors can exploit CVE-2021-26476 by meticulously crafting LaTeX input and submitting it through the vulnerable URI, thereby triggering the execution of unauthorized OS commands.

Mitigation and Prevention

It is crucial to implement immediate measures to mitigate the risks associated with CVE-2021-26476 and prevent potential attacks.

Immediate Steps to Take

Users are advised to update EPrints to a secure version, apply relevant patches, and sanitize user inputs to prevent the execution of malicious commands.

Long-Term Security Practices

To enhance security posture, organizations should conduct regular security audits, educate users on safe computing practices, and enforce strict access controls.

Patching and Updates

Vendor-supplied patches and software updates play a pivotal role in addressing vulnerabilities like CVE-2021-26476. It is essential to promptly apply patches to safeguard systems from exploitation.