CVE-2022-27240 : What You Need to Know

A buffer overflow vulnerability in scheme/webauthn.c in Glewlwyd SSO server 2.x before 2.6.2 could allow an attacker to execute arbitrary code by exploiting a webauthn assertion.

Understanding CVE-2022-27240

This CVE refers to a critical buffer overflow issue in the Glewlwyd SSO server version 2.x before 2.6.2 that could be exploited through a webauthn assertion.

What is CVE-2022-27240?

The vulnerability in Glewlwyd SSO server 2.x before 2.6.2 allows an attacker to perform a buffer overflow attack via a webauthn assertion, potentially leading to arbitrary code execution.

The Impact of CVE-2022-27240

If successfully exploited, this vulnerability could result in unauthorized access, data theft, or even complete control over the affected system, posing a significant security risk to organizations using the vulnerable versions.

Technical Details of CVE-2022-27240

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The buffer overflow vulnerability in scheme/webauthn.c within Glewlwyd SSO server 2.x before 2.6.2 enables attackers to exceed the allocated buffer space, potentially overwriting adjacent memory locations with malicious code.

Affected Systems and Versions

Glewlwyd SSO server versions 2.x before 2.6.2 are confirmed to be impacted by this vulnerability.

Exploitation Mechanism

By crafting a specific webauthn assertion, threat actors can trigger the buffer overflow in Glewlwyd SSO server 2.x before 2.6.2, enabling them to execute arbitrary code on the target system.

Mitigation and Prevention

To secure systems and prevent exploitation of CVE-2022-27240, immediate measures and long-term security practices are recommended.

Immediate Steps to Take

Organizations should update Glewlwyd SSO server to version 2.6.2 or later, where the vulnerability has been patched.
Employ network security measures to filter out potential malicious webauthn assertions at the perimeter.

Long-Term Security Practices

Regularly monitor and audit system logs for any unusual activities that might indicate an ongoing exploitation attempt.
Conduct security awareness training for employees to educate them on recognizing and reporting suspicious activities.

Patching and Updates

Stay informed about security updates and patches released by Glewlwyd to address potential vulnerabilities and ensure the timely application of fixes.