#VU61255 Incorrect Regular Expression in hosted-git-info - CVE-2021-23362

Vulnerability identifier: #VU61255

Vulnerability risk: Medium

CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2021-23362

CWE-ID: CWE-185

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
hosted-git-info
Web applications / Modules and components for CMS

Vendor: npm Inc.

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 expression "shortcutMatch" in the "fromUrl" function. 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

hosted-git-info: 1.1.0 - 3.0.7

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External links
https://github.com/npm/hosted-git-info/commit/bede0dc38e1785e732bf0a48ba6f81a4a908eba3
https://snyk.io/vuln/SNYK-JS-HOSTEDGITINFO-1088355
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1088356
https://github.com/npm/hosted-git-info/commits/v2
https://github.com/npm/hosted-git-info/commit/29adfe5ef789784c861b2cdeb15051ec2ba651a7
https://github.com/npm/hosted-git-info/commit/8d4b3697d79bcd89cdb36d1db165e3696c783a01

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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. However, proof of concept for this vulnerability is available.