#VU61046 Type Confusion in json-pointer - CVE-2021-23820

Vulnerability identifier: #VU61046

Vulnerability risk: High

CVSSv4.0: [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:P/U:Amber]

CVE-ID: CVE-2021-23820

CWE-ID: CWE-843

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
json-pointer
Web applications / Modules and components for CMS

Vendor: Manuel Stofer

Description

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

The vulnerability exists due to a type confusion error. A remote attacker can pass specially crafted data to the application, trigger a type confusion error and 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

json-pointer: 0.0.2 - 0.6.0

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External links
http://snyk.io/vuln/SNYK-JS-JSONPOINTER-1577287
http://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1910686
http://github.com/manuelstofer/json-pointer/blob/master/index.js%23L78

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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.