#VU76820 Type Confusion in node-jsonpointer - CVE-2021-23807

Vulnerability identifier: #VU76820

Vulnerability risk: High

CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2021-23807

CWE-ID: CWE-843

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
node-jsonpointer
Other software / Other software solutions

Vendor: janl

Description

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

The vulnerability exists due to a type confusion error when the pointer components are arrays. A remote attacker can bypass of a previous Prototype Pollution fix when the pointer components are arrays.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability..

Vulnerable software versions

node-jsonpointer: before 5.0.0

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External links
https://snyk.io/vuln/SNYK-JS-JSONPOINTER-1577288
https://github.com/janl/node-jsonpointer/pull/51
https://github.com/janl/node-jsonpointer/commit/a0345f3550cd9c4d89f33b126390202b89510ad4
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1910273

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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.