Regular expression denial of service in sanitize-html

1) Incorrect Regular Expression

EUVDB-ID: #VU68954

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-25887

CWE-ID: CWE-185 - Incorrect Regular Expression

Exploit availability: No

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 update from vendor's website.

Vulnerable software versions

sanitize-html: 2.0.0 - 2.7.0

External links

http://security.snyk.io/vuln/SNYK-JS-SANITIZEHTML-2957526
http://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-3008102
http://github.com/apostrophecms/sanitize-html/pull/557
http://github.com/apostrophecms/sanitize-html/commit/b4682c12fd30e12e82fa2d9b766de91d7d2cd23c

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.