Resource exhaustion in SockJS for Node - CVE-2020-7693
Published: July 13, 2020 / Updated: July 15, 2020
Vulnerability identifier: #VU29692
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green
CVE-ID: CVE-2020-7693
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vendor: SockJS
Affected software:
SockJS for Node
SockJS for Node
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources within the "Upgrade" header with the value "websocket". A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.
How to mitigate CVE-2020-7693
Install updates from vendor's website.
Sources
- https://github.com/andsnw/sockjs-dos-py
- https://github.com/sockjs/sockjs-node/commit/dd7e642cd69ee74385825816d30642c43e051d16
- https://github.com/sockjs/sockjs-node/issues/252
- https://github.com/sockjs/sockjs-node/pull/265
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-575448
- https://snyk.io/vuln/SNYK-JS-SOCKJS-575261