CVE-2024-45296: High Vulnerability in path-to-regexp

CVE-2024-45296 is a high-severity vulnerability affecting the path-to-regexp library. This vulnerability allows for the generation of inefficient regular expressions, which can cause significant performance issues. Specifically, the problem arises when the library outputs a regular expression that, under certain conditions, leads to denial of service (DoS) by blocking the JavaScript event loop. This situation occurs when two parameters within a single segment are separated by a character other than a period (.). As such, organizations using this library must take immediate action.

With a CVSS score of 7.5, this vulnerability is classified as high severity, indicating a significant risk to organizations. The potential for denial of service can affect the availability of applications relying on this library, leading to disruptions in service and potential financial losses. Organizations are urged to prioritize remediation efforts to mitigate any risks associated with this vulnerability.

Currently, there are no known exploits for this vulnerability, but the high exploitability score suggests that it could be targeted by attackers. Organizations should be vigilant and take proactive measures to ensure their systems are not affected by this issue. Upgrading to the recommended versions is critical to prevent any potential exploitation.

Organizations should prioritize patching immediately. Users of version 0.1 should upgrade to 0.1.10, while all other users are advised to upgrade to version 8.0.0. This upgrade is essential to mitigate the risk posed by this vulnerability.

Vulnerability Details

The vulnerability identified in CVE-2024-45296 arises from the path-to-regexp library, which converts path strings into regular expressions. In this case, the library generates a bad regular expression due to incorrect parameter handling, leading to performance degradation and potential denial of service. The CVSS score of 7.5 indicates a high severity level, suggesting a considerable impact on availability.

This vulnerability is categorized under CWE-1333, which pertains to performance issues caused by improper regular expression generation. The specific conditions that lead to the generation of the bad regular expression involve having two parameters within a single segment separated by non-period characters. The publication date for this vulnerability is September 9, 2024.

Technical Analysis

The root cause of CVE-2024-45296 stems from the path-to-regexp library's inability to handle certain parameter configurations properly. The attack vector is network-based, allowing remote attackers to exploit this vulnerability. The attack complexity is low, as it does not require advanced skills to trigger the performance degradation.

No privileges are required to exploit this vulnerability, and user interaction is not needed, making it easier for attackers to execute a denial of service attack. The impact on availability is high, as successful exploitation can block the event loop, causing the application to become unresponsive.

Risk & Impact Analysis

The real-world risk posed by CVE-2024-45296 is significant, especially for organizations utilizing the path-to-regexp library in their applications. The potential for denial of service can disrupt services and lead to substantial financial losses. Given the nature of the vulnerability and its impact on availability, it is crucial for organizations to assess their deployment of this library and take necessary actions to mitigate risks.

The urgency for remediation is underscored by the high CVSS score and the potential for exploitation. Organizations should prioritize patching to the recommended versions to ensure their systems are protected against this vulnerability. Failure to address this issue may result in significant downtime and loss of customer trust.

Exploitation Status

Affected Versions

This vulnerability affects users of the path-to-regexp library, specifically those using version 0.1, which must upgrade to 0.1.10. All other users should update to version 8.0.0 to mitigate the risks associated with CVE-2024-45296.

Mitigation & Remediation

Organizations must implement the following remediation steps to address CVE-2024-45296: upgrade to version 0.1.10 if using version 0.1, and to version 8.0.0 for all other users. Additionally, it is recommended to conduct thorough testing to ensure that the upgrade resolves the vulnerability and does not introduce new issues. For comprehensive security assessments, organizations can consider engaging in application security assessments to identify any other vulnerabilities that may exist within their systems.

Detection Guidance

To detect potential exploitation of CVE-2024-45296, organizations should monitor system logs for any unusual patterns of performance degradation, particularly in applications utilizing the path-to-regexp library. Additionally, behavioral anomalies that indicate excessive resource consumption may signal an attempted denial of service attack. Implementing network signatures to alert on abnormal traffic patterns could also enhance detection capabilities.

AppSecure Threat Intelligence Insight

CVE-2024-45296 represents a significant threat in the landscape of web application vulnerabilities, particularly due to its potential for denial of service attacks. Security teams should remain vigilant and adopt a proactive stance in addressing such vulnerabilities. For organizations looking to bolster their security posture, engaging in red teaming services can provide insights into vulnerabilities and help prioritize remediation efforts effectively.

Moreover, organizations can benefit from implementing a robust penetration testing program to regularly assess their applications and infrastructure against evolving threats.

Finally, staying informed about emerging vulnerabilities through resources and continuous education can significantly enhance an organization's ability to respond to potential threats.