Vulnerability identifier: #VU66616

Vulnerability 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-2021-23364

CWE-ID: CWE-185

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
browserslist
Other software / Other software solutions

Vendor: Browserslist

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

browserslist: 4.0.0 - 4.16.4

---

External links
http://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1277182
http://github.com/browserslist/browserslist/commit/c091916910dfe0b5fd61caad96083c6709b02d98
http://github.com/browserslist/browserslist/pull/593
http://github.com/browserslist/browserslist/blob/e82f32d1d4100d6bc79ea0b6b6a2d281a561e33c/index.js%23L472-L474
http://snyk.io/vuln/SNYK-JS-BROWSERSLIST-1090194

---

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.