Vulnerability identifier: #VU81048

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-2021-29059

CWE-ID: CWE-185

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
is-svg
Web applications / JS libraries

Vendor: sindresorhus

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

Vulnerable software versions

is-svg: 2.1.0 - 4.2.2

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External links
http://github.com/yetingli/SaveResults/blob/main/js/is-svg.js
http://www.npmjs.com/package/is-svg
http://github.com/sindresorhus/is-svg/releases/tag/v4.3.0
http://github.com/yetingli/PoCs/blob/main/CVE-2021-29059/IS-SVG.md

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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.