CVE-2021-26530 : What You Need to Know

The mg_tls_init function in Cesanta Mongoose HTTPS server 7.0 (compiled with OpenSSL support) is vulnerable to remote out-of-bounds write attack via connection request after exhausting the memory pool.

Understanding CVE-2021-26530

This section provides insights into the nature of the CVE-2021-26530 vulnerability.

What is CVE-2021-26530?

The vulnerability lies in the mg_tls_init function in Cesanta Mongoose HTTPS server 7.0, which, when compiled with OpenSSL support, allows for a remote out-of-bounds write attack through a connection request following memory pool depletion.

The Impact of CVE-2021-26530

This vulnerability can be exploited to execute arbitrary code remotely, potentially leading to a complete compromise of the affected system.

Technical Details of CVE-2021-26530

Delve into the specifics of the CVE-2021-26530 vulnerability.

Vulnerability Description

The flaw in the mg_tls_init function enables attackers to perform a remote out-of-bounds write attack post-memory pool exhaustion, posing a severe security risk.

Affected Systems and Versions

Cesanta Mongoose HTTPS server 7.0 compiled with OpenSSL support is affected by this vulnerability.

Exploitation Mechanism

By exploiting this vulnerability, threat actors can trigger a remote OOB write attack through a connection request, exploiting the memory pool's exhaustion.

Mitigation and Prevention

Discover the steps to mitigate and prevent potential exploitation of CVE-2021-26530.

Immediate Steps to Take

Immediately apply patches or updates provided by Cesanta to address the vulnerability and enhance system security.

Long-Term Security Practices

Implement robust security measures, including network segregation, access control, and regular security audits, to fortify the system against potential attacks.

Patching and Updates

Regularly monitor for security advisories from Cesanta and promptly apply patches and updates to ensure the system is protected against known vulnerabilities.