CVE Vulnerability

CVE-2020-7662

websocket-extensions npm module prior to 0.1.4 allows Denial of Service (DoS) via Regex Backtracking. The extension parser may take quadratic time when parsing a header containing an unclosed string parameter value whose content is a repeating two-byte sequence of a backslash and some other character. This could be abused by an attacker to conduct Regex Denial Of Service (ReDoS) on a single-threaded server by providing a malicious payload with the Sec-WebSocket-Extensions header.

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://github.com/faye/websocket-extensions-node/commit/29496f6838bfadfe5a2f85dff33ed0ba33873237 Patch Third Party Advisory
https://blog.jcoglan.com/2020/06/02/redos-vulnerability-in-websocket-extensions Exploit Third Party Advisory
https://github.com/faye/websocket-extensions-node/security/advisories/GHSA-g78m-2chm-r7qv Exploit Third Party Advisory
https://snyk.io/vuln/SNYK-JS-WEBSOCKETEXTENSIONS-570623 Exploit Technical Description
Configurations

Configuration 1

cpe:2.3:a:websocket-extensions_project:websocket-extensions:*:*:*:*:*:node.js:*:*
Information

Published : 2020-06-02 07:15

Updated : 2020-12-23 06:22

NVD link : CVE-2020-7662

Mitre link : CVE-2020-7662

Products Affected
No products.
CWE
NVD-CWE-Other