#VU76187 Incorrect regular expression in Html-parse-stringify - CVE-2021-23346

Vulnerability identifier: #VU76187

Vulnerability risk: Medium

CVSSv4.0: 6.6 [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:U/U:Green]

CVE-ID: CVE-2021-23346

CWE-ID: CWE-185

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Html-parse-stringify

Vendor: Html-parse-stringify Project

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. A remote attacker can pass specially crafted data to the application and perform regular expression denial of service (ReDos) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Html-parse-stringify: 1.0.0 - 2.0.0

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External links
https://github.com/HenrikJoreteg/html-parse-stringify/blob/master/lib/parse.js%23L2
https://github.com/HenrikJoreteg/html-parse-stringify/commit/c7274a48e59c92b2b7e906fedf9065159e73fe12
https://github.com/rayd/html-parse-stringify2/blob/master/lib/parse.js%23L2
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1080633
https://snyk.io/vuln/SNYK-JS-HTMLPARSESTRINGIFY-1079306
https://snyk.io/vuln/SNYK-JS-HTMLPARSESTRINGIFY2-1079307

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.