Denial of service in css-what



Published: 2023-05-16
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-21222
CWE-ID CWE-185
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		css-what
Web applications / JS libraries

Vendor fb55

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Incorrect regular expression

EUVDB-ID: #VU76184

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2022-21222

CWE-ID:

Exploit availability:

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient input validation when processing regular expressions in the re_attr variable of index.js. A remote attacker can pass specially crafted data to the application and perform regular expression denial of service (ReDos) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

css-what: 2.0.0 - 2.1.2

Fixed software versions

CPE2.3 External links

http://security.snyk.io/vuln/SNYK-JS-CSSWHAT-3035488
http://github.com/fb55/css-what/blob/a38effd5a8f5506d75c7f8f13cbd8c76248a3860/index.js%23L12
http://lists.debian.org/debian-lts-announce/2023/03/msg00001.html


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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