CVE-2024-21536 is a high-severity vulnerability affecting the Chimurai http-proxy-middleware package. Specifically, versions prior to 2.0.7 and between 3.0.0 and 3.0.3 are susceptible to a Denial of Service (DoS) attack. This vulnerability arises from an UnhandledPromiseRejection error caused by the micromatch library, allowing an attacker to crash the Node.js process by sending requests to certain paths.
With a CVSS score of 7.5, this vulnerability poses a significant risk to organizations utilizing affected versions of http-proxy-middleware. The potential impact includes service disruption and unavailability, which can have severe implications for business continuity.
Currently, there are no known exploits or public proof of concept (PoC) for this vulnerability. However, organizations should take this threat seriously as the exploitability is considered high. Immediate action is recommended to mitigate any risk associated with this vulnerability.
Organizations should prioritize patching immediately to ensure the security of their applications and services that rely on the http-proxy-middleware package.
Vulnerability Details
The vulnerability is classified as a Denial of Service (DoS) attack, which is a critical concern for any network application. The vulnerability has a CVSS 3.1 score of 7.5, indicating a high severity level due to the potential availability impact. Affected versions include all versions prior to 2.0.7 and versions from 3.0.0 to 3.0.3. The vulnerability was published on October 19, 2024.
This vulnerability falls under the CWE-400 classification, which represents 'Uncontrolled Resource Consumption'. The risk is particularly pronounced for organizations deploying applications that utilize the affected versions of the http-proxy-middleware package.
Technical Analysis
The root cause of this vulnerability lies in the failure to properly handle promise rejections within the micromatch library. This oversight allows an attacker to craft requests that trigger the error, ultimately leading to the termination of the Node.js process. The attack vector is categorized as network-based, with low complexity and no privileges required for exploitation. Importantly, no user interaction is necessary for an attacker to exploit this vulnerability.
The impacts of this vulnerability are concentrated in the availability domain, where successful exploitation can lead to service outages. Confidentiality and integrity impacts are not applicable in this case, as the vulnerability does not expose sensitive information or alter data.
Risk & Impact Analysis
The real-world risk associated with this vulnerability is significant, as a successful attack can result in application downtime and disruption of services. Given the nature of DoS attacks, the blast radius can be extensive, affecting any service relying on the affected version of the http-proxy-middleware package. This vulnerability underlines the importance of maintaining up-to-date software and performing regular security assessments.
Organizations should address this vulnerability in their priority patch cycle. The urgency is underscored by the potential for widespread service disruption if left unaddressed.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions of http-proxy-middleware include all versions prior to 2.0.7 and from 3.0.0 to 3.0.3. Organizations using these versions should upgrade to the latest release to mitigate the vulnerability.
Mitigation & Remediation
To remediate this vulnerability, organizations should update to version 2.0.7 or later of the http-proxy-middleware package. If an immediate upgrade is not possible, consider applying workarounds such as implementing network controls to restrict access to vulnerable paths and monitoring for any unusual traffic patterns.
For ongoing security assurance, organizations are encouraged to conduct regular security assessments and implement continuous security testing. For more information on effective security testing, organizations should refer to continuous penetration testing methodologies.
Detection Guidance
Organizations should monitor logs for indicators of exploitation attempts, particularly errors related to promise rejections or unusual request patterns targeting the http-proxy-middleware paths. Behavioral anomalies, such as unexpected server crashes or restarts, may also indicate attempts to exploit this vulnerability.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2024-21536 lies in its demonstration of the potential impact of unhandled errors in software libraries. This vulnerability highlights the need for robust error handling and security practices in the development lifecycle. Organizations should take this opportunity to review their dependency management and vulnerability management programs.
To effectively mitigate similar vulnerabilities in the future, security teams should consider implementing comprehensive security testing and monitoring practices, such as those outlined in the penetration testing methodology, to identify and remediate vulnerabilities proactively.
Additionally, organizations should stay informed about emerging threats and trends, leveraging resources such as the vulnerability management program to enhance their security posture.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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