CVE-2021-29506 Explained : Impact and Mitigation

GraphHopper, an open-source Java routing engine, was found to be vulnerable to a regex injection issue, impacting versions 2.0 to 2.4. This flaw could be exploited to trigger a Denial of Service (DoS) attack. The issue has been addressed in versions 2.4 and 3.0 through a patch. Below is a detailed overview of CVE-2021-29506.

Understanding CVE-2021-29506

This section delves into the specifics of the vulnerability found in GraphHopper software.

What is CVE-2021-29506?

GraphHopper's Navigate endpoint contained a regex injection vulnerability between versions 2.0 and 2.4, allowing attackers to potentially launch DoS attacks.

The Impact of CVE-2021-29506

The vulnerability poses a medium-severity risk with a CVSS base score of 6.5. It could result in a significant loss of availability for affected services.

Technical Details of CVE-2021-29506

Explore the technical aspects of the CVE and its implications.

Vulnerability Description

The regex injection flaw in GraphHopper's Navigate endpoint could be used to disrupt services and lead to a DoS condition.

Affected Systems and Versions

GraphHopper versions 2.0 through 2.4 are confirmed to be vulnerable to this issue.

Exploitation Mechanism

By manipulating the regular expression pattern in the Navigate endpoint, threat actors can exploit this weakness to cause service unavailability.

Mitigation and Prevention

Discover recommended actions to mitigate the risks associated with CVE-2021-29506.

Immediate Steps to Take

Users should update their GraphHopper installations to version 2.4 or 3.0 to apply the necessary security patches and prevent exploitation.

Long-Term Security Practices

Maintaining an updated software environment and monitoring security advisories can help prevent future vulnerabilities.

Patching and Updates

Regularly check for software updates and security patches from GraphHopper to address known vulnerabilities and enhance system security.