#VU55498 Prototype pollution in Ajv - CVE-2020-15366

Vulnerability identifier: #VU55498

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-15366

CWE-ID: CWE-94

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Ajv
Web applications / JS libraries

Vendor: Ajv

Description

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

The vulnerability exists due to insufficient sanitization of user-supplied data. A remote attacker can inject and execute arbitrary script code.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Ajv: 6.12.0 - 6.12.2

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External links
https://hackerone.com/bugs?subject=user&report_id=894259
https://github.com/ajv-validator/ajv/releases/tag/v6.12.3
https://github.com/ajv-validator/ajv/tags

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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.