A vulnerability was found in ssri Module up to 5.2.1 on Node.js (JavaScript Library). It has been rated as problematic. This issue affects an unknown part of the component Regular Expression. The manipulation as part of a Base64 String leads to a resource consumption vulnerability. Using CWE to declare the problem leads to 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. Impacted is availability. The summary by CVE is:

index.js in the ssri module before 5.2.2 for Node.js is prone to a regular expression denial of service vulnerability in strict mode functionality via a long base64 hash string.

The bug was discovered 02/14/2018. The weakness was disclosed 03/04/2018 (GitHub Repository). It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2018-7651 since 03/03/2018. The attack may be initiated remotely. No form of authentication is needed for a successful 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 17 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 5.2.2 eliminates this vulnerability.

Productinfo

Type

• JavaScript Library

Name

• ssri Module

Version

• 5.2.0
• 5.2.1

License

• open-source

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CPE 2.2info

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