Remote code execution in Underscore

Published: 2021-04-06

Risk	High
Patch available	YES
Number of vulnerabilities	1
CVE ID	CVE-2021-23358
CWE ID	CWE-94
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Underscore.js Web applications / JS libraries
Vendor	Jeremy Ashkenas

Security Advisory

This security advisory describes one high risk vulnerability.

1) Code Injection

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2021-23358

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: No

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, 1.3.3, 1.4.0, 1.4.1, 1.4.2, 1.4.3, 1.4.4, 1.5.0, 1.5.1, 1.5.2, 1.6.0, 1.7.0, 1.8.0, 1.8.1, 1.8.2, 1.8.3, 1.9.0, 1.9.1, 1.9.2, 1.10.0, 1.10.1, 1.10.2, 1.11.0, 1.12.0, 1.13.0-0, 1.13.0-1

CPE

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

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.