Platform
nodejs
Component
decode-uri-component
Fixed in
0.2.1
CVE-2022-38900 describes a Denial of Service (DoS) vulnerability found in the decode-uri-component package. This flaw stems from improper input validation, which can be exploited to cause a DoS condition. Specifically, version 0.2.0 of decode-uri-component is affected. The vulnerability is resolved in version 0.2.1.
CVE-2022-38900 in the decode-uri-component library, specifically version 0.2.0, presents a denial-of-service (DoS) vulnerability stemming from improper input validation. An attacker can trigger this vulnerability by providing a maliciously crafted URI component string to the decodeComponent function. This crafted string, designed to contain an excessive number of percent-encoded characters or deeply nested encoded sequences, can cause the decoding process to consume an unreasonable amount of memory or CPU resources. This resource exhaustion can lead to the application or server hosting the decode-uri-component library becoming unresponsive or crashing, effectively denying service to legitimate users. The data at risk isn't directly compromised in terms of confidentiality or integrity; however, the service disruption can impact critical business operations and user access. The blast radius is limited to the application utilizing the decode-uri-component library. If this library is a dependency of a larger application or system, the impact could propagate, affecting other components reliant on the vulnerable application's functionality. The severity is rated High (CVSS score 7.5) due to the potential for significant service disruption.
As of the current assessment, there are no publicly available exploitation reports or proof-of-concept (POC) code for CVE-2022-38900. This doesn't diminish the risk, as the vulnerability is relatively straightforward to understand and potentially exploit. The lack of public exploits suggests that it hasn't been actively targeted, but it could become a target in the future. The absence of readily available exploits lowers the immediate urgency, but proactive patching is still strongly recommended to prevent potential future exploitation. The vulnerability's DoS nature means that exploitation doesn't necessarily require sophisticated techniques, making it accessible to a wider range of attackers. Continuous monitoring of security advisories and vulnerability databases is advised to stay informed of any new developments related to this CVE.
Exploit Status
EPSS
0.61% (70% percentile)
CVSS Vector
The primary mitigation for CVE-2022-38900 is to upgrade the decode-uri-component library to version 0.2.1 or later. This version includes a fix that addresses the improper input validation issue. If upgrading is not immediately feasible, a temporary workaround involves implementing input validation on the URI component string before passing it to the decodeComponent function. This validation should limit the length of the string and the nesting depth of encoded sequences. For example, you could impose a maximum length for the decoded string or restrict the number of percent-encoded characters allowed. Carefully test any workaround to ensure it doesn't introduce new vulnerabilities or negatively impact application functionality. After applying the upgrade or workaround, verify the fix by attempting to decode a known malicious URI component string. Monitor system resource usage (CPU and memory) during decoding to confirm that resource consumption remains within acceptable limits. Consider using a web application firewall (WAF) to filter potentially malicious URI components before they reach the application.
Actualiza la librería decode-uri-component a la versión 0.2.1 o superior para mitigar la vulnerabilidad de denegación de servicio (DoS) causada por una validación de entrada incorrecta. Puedes hacerlo utilizando npm o yarn.
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CVE-2022-38900 is a vulnerability in the decode-uri-component library that allows an attacker to cause a denial-of-service (DoS) by providing a specially crafted URI component string.
Applications using decode-uri-component version 0.2.0 are affected by this vulnerability.
Upgrade the decode-uri-component library to version 0.2.1 or later to resolve this issue.
Currently, there are no publicly available exploitation reports or proof-of-concept code for CVE-2022-38900.
Refer to the National Vulnerability Database (NVD) entry for CVE-2022-38900 at https://nvd.nist.gov/vuln/detail/CVE-2022-38900
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