#VU51623 Input validation error in ColdFusion - CVE-2021-21087

Vulnerability identifier: #VU51623

Vulnerability 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-2021-21087

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ColdFusion
Server applications / Application servers

Vendor: Adobe

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to insufficient validation of user-supplied input. A remote non-authenticated attacker can send specially crafted data to the application and execute arbitrary code on the system.

Mitigation

Install updates from vendor's website.

NOTE, Adobe recommends updating your ColdFusion JDK/JRE to the latest version of the LTS releases for 1.8 and JDK 11. Applying the ColdFusion update without a corresponding JDK update will NOT secure the server.

Please, see the vendor's advisory for details.

Vulnerable software versions

ColdFusion: 2016 Update 1 - 2016, 2018 Update 1 - 2018, 2021

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External links
https://helpx.adobe.com/security/products/coldfusion/apsb21-16.html

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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.