CVE-2022-37451 Explained : Impact and Mitigation

Exim before version 4.96 is impacted by CVE-2022-37451 due to an invalid free vulnerability in pam_converse. This vulnerability exists in the auths/call_pam.c file as the function store_free is not utilized after store_malloc.

Understanding CVE-2022-37451

This section provides an insight into the details and impact of CVE-2022-37451.

What is CVE-2022-37451?

CVE-2022-37451 affects Exim versions prior to 4.96 and involves an invalid free vulnerability in the pam_converse function within the call_pam.c file.

The Impact of CVE-2022-37451

The presence of this vulnerability can potentially lead to security breaches and unauthorized access to systems running the affected Exim versions.

Technical Details of CVE-2022-37451

Let's delve deeper into the technical aspects of CVE-2022-37451.

Vulnerability Description

The vulnerability arises from the lack of using store_free after store_malloc, leaving the system susceptible to exploitation.

Affected Systems and Versions

Exim versions before 4.96 are affected by this vulnerability, making them exposed to potential security risks.

Exploitation Mechanism

Attackers can exploit this vulnerability to execute arbitrary code or carry out other malicious activities on systems running the vulnerable Exim versions.

Mitigation and Prevention

It is crucial to implement immediate steps and long-term security practices to mitigate the risks associated with CVE-2022-37451.

Immediate Steps to Take

System administrators should apply security patches, restrict network access to the Exim service, and monitor for any unusual activities indicative of exploitation.

Long-Term Security Practices

Regular security audits, ongoing monitoring, and timely application of software updates are essential practices to enhance the overall security posture of systems.

Patching and Updates

Users are advised to update Exim to version 4.96 or newer to mitigate the vulnerability and ensure the security of their systems.