#VU51945 Code Injection in Underscore.js - CVE-2021-23358

Vulnerability identifier: #VU51945

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2021-23358

CWE-ID: CWE-94

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Underscore.js
Web applications / JS libraries

Vendor: Jeremy Ashkenas

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation. A remote attacker can send a specially crafted request and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Underscore.js: 1.3.2 - 1.13.0-1

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External links
https://github.com/jashkenas/underscore/blob/master/modules/template.js%23L71
https://lists.debian.org/debian-lts-announce/2021/03/msg00038.html
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-1081504
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWERGITHUBJASHKENAS-1081505
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1081503
https://snyk.io/vuln/SNYK-JS-UNDERSCORE-1080984
https://www.debian.org/security/2021/dsa-4883

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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.