Vulnerability identifier: #VU63698

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-33502

CWE-ID: CWE-185

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
normalize-url
Web applications / JS libraries

Vendor: Sindre Sorhus

Description

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

The vulnerability exists due to exponential performance for data. A remote attacker can pass specially crafted data to the application and perform a regular expression denial of service (ReDos) attack.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability..

Vulnerable software versions

normalize-url: 4.5.0, 5.3.0, 5.2.0 - 5.2.1, 5.1.0, 5.0.0, 6.0.0

---

External links
http://github.com/sindresorhus/normalize-url/releases/tag/v6.0.1
http://security.netapp.com/advisory/ntap-20210706-0001/

---

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.