method-override on Node.js Regular Expression resource consumption

Summaryinfo

A vulnerability was found in method-override on Node.js. It has been classified as problematic. The affected element is an unknown function. Performing a manipulation as part of Regular Expression results in resource consumption. This vulnerability was named CVE-2017-16136. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in method-override on Node.js (JavaScript Library) (unknown version). It has been classified as problematic. This affects an unknown code block. The manipulation as part of a Regular Expression leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability. The summary by CVE is:

method-override is a module used by the Express.js framework to let you use HTTP verbs such as PUT or DELETE in places where the client doesn't support it. method-override is vulnerable to a regular expression denial of service vulnerability when specially crafted input is passed in to be parsed via the X-HTTP-Method-Override header.

The bug was discovered 09/27/2017. The weakness was presented 06/07/2018 (Website). It is possible to read the advisory at nodesecurity.io. This vulnerability is uniquely identified as CVE-2017-16136 since 10/29/2017. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 252 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• JavaScript Library

Name

• method-override

CPE 2.3info

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CPE 2.2info

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