Remote code execution in json-schema

1) Code Injection

EUVDB-ID: #VU64034

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-2021-3918

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

Exploit availability: No

Description

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

The vulnerability exists due to insufficient sanitization of user-supplied data during the validation of a JSON object. A remote attacker can pass a specially crafted JSON file for validation and execute arbitrary code.

Mitigation

Install update from vendor's website.

Vulnerable software versions

JSON schema: 0.0.0 - 0.3.2

CPE2.3

• cpe:2.3:a:tdegrunt:json-schema:0.0.0:*:*:*:*:nodejs:*:*
• cpe:2.3:a:tdegrunt:json-schema:0.0.1:*:*:*:*:nodejs:*:*
• cpe:2.3:a:tdegrunt:json-schema:0.0.2:*:*:*:*:nodejs:*:*

External links

https://github.com/kriszyp/json-schema/commit/22f146111f541d9737e832823699ad3528ca7741
https://huntr.dev/bounties/bb6ccd63-f505-4e3a-b55f-cd2662c261a9

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.