GraphHopper is an open-source Java routing engine. In GraphHopper from version 2.0 and before version 2.4, there is a regular expression injection vulnerability that may lead to Denial of Service. This vulnerability allows attackers to exploit the system through crafted input, potentially causing significant disruptions.
The CVSS score for this vulnerability is 6.5, categorizing it as medium severity. The importance of addressing this vulnerability is underscored by its potential availability impact, which is rated high. Organizations utilizing affected versions should prioritize remediation efforts to minimize exposure.
As of now, there are no known exploits publicly available for this vulnerability, although it is critical to remain vigilant. Organizations should prioritize patching immediately to ensure that their systems are secure against potential threats.
GraphHopper has released patches in versions 2.4 and 3.0 to address this issue. Users must ensure they are running these versions or later to mitigate the risk effectively.
Vulnerability Details
This vulnerability allows for potential denial of service conditions in GraphHopper, an essential routing engine for Java. The CVE-2021-29506 vulnerability affects all versions from 2.0 up to 2.4, necessitating immediate attention from users.
The vulnerability has been classified under CWE-400, indicating an issue with resource exhaustion. It was disclosed on May 13, 2021, and has a CVSS version 3.1 score that highlights the medium severity of the impact, particularly in terms of availability.
Technical Analysis
The root cause of this vulnerability is the improper handling of regular expressions within the GraphHopper routing engine. Attackers may exploit this through crafted inputs that manipulate the regex processing, leading to potential service disruptions.
The attack vector is categorized as network-based, requiring low attack complexity and low privileges to execute. No user interaction is required for exploitation, making it particularly concerning for organizations relying on this software.
Risk & Impact Analysis
Organizations utilizing GraphHopper must recognize the real-world risks associated with this vulnerability. The potential for service disruption underscores the urgency for remediation. The high availability impact indicates that an attacker could exploit this vulnerability to make the service unavailable, affecting business operations and customer trust.
Given the CVSS score and the nature of the vulnerability, organizations should address this issue in their priority patch cycle. Not addressing this vulnerability could result in significant operational downtime and affect overall service reliability.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions of GraphHopper include all versions from 2.0 up to but not including 2.4. Users must ensure they upgrade to version 2.4 or later to mitigate this vulnerability.
Mitigation & Remediation
To remediate this vulnerability, organizations should upgrade to GraphHopper version 2.4 or later, where the issue has been patched. For those unable to immediately upgrade, implementing network controls to limit exposure to untrusted inputs may provide temporary mitigation.
Organizations should also consider conducting a thorough security assessment to identify potential vulnerabilities and harden configurations to minimize risk. Regular updates and continuous penetration testing can further ensure that systems remain secure.
Penetration testing services can help organizations validate the effectiveness of their remediation efforts.
Detection Guidance
To detect potential exploitation of this vulnerability, organizations should monitor logs for unusual patterns in request handling, particularly those related to regex processing. Behavioral anomalies in application performance may also indicate attempts to exploit this vulnerability.
Network signatures associated with known regex injection patterns can aid in identifying malicious activity. Additionally, monitoring for unexpected service interruptions can help detect potential exploitation attempts.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2021-29506 lies in its demonstration of how open-source components can introduce risks through common coding practices, such as improper input validation. This incident underscores the importance of regular code reviews and security audits.
Security teams must learn from this case and implement best practices that prioritize security throughout the software development lifecycle. Conducting regular updates and security assessments is crucial to maintaining application integrity.
Vulnerability management programs are essential for mitigating risks associated with vulnerabilities like CVE-2021-29506.
By leveraging continuous security testing, organizations can better prepare for and respond to emerging threats, ensuring a robust security posture.
Adopting penetration testing methodologies can help organizations identify and remediate vulnerabilities proactively.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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