Remote code execution in handlebars.js



Published: 2021-02-23 | Updated: 2021-07-04
Risk High
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2021-23369
CVE-2021-23383
CWE-ID CWE-94
Exploitation vector Network
Public exploit Public exploit code for vulnerability #2 is available.
Vulnerable software
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handlebars.js
Web applications / JS libraries

Vendor The Handlebars Templating Language

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

Updated 10.05.2021

Added vulnerability #2

1) Code Injection

EUVDB-ID: #VU50896

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-23369

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

handlebars.js: 1.0.0 - 4.7.6


CPE2.3 External links

http://github.com/handlebars-lang/handlebars.js/commit/b6d3de7123eebba603e321f04afdbae608e8fea8
http://github.com/handlebars-lang/handlebars.js/commit/f0589701698268578199be25285b2ebea1c1e427

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) Prototype Pollution

EUVDB-ID: #VU53013

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-23383

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

Exploit availability: Yes

Description

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

The vulnerability exists due to improper input validation when selecting certain compiling options to compile templates. A remote attacker can execute arbitrary code on the target system.

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

Mitigation

Install update from vendor's website.

Vulnerable software versions

handlebars.js: 1.0.0 - 4.7.6


CPE2.3 External links

http://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-1279032
http://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-1279031
http://github.com/handlebars-lang/handlebars.js/commit/f0589701698268578199be25285b2ebea1c1e427
http://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1279030
http://snyk.io/vuln/SNYK-JS-HANDLEBARS-1279029

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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