#VU80905 Improper Authentication in IBM WebSphere Application Server Liberty - CVE-2020-4421

Vulnerability identifier: #VU80905

Vulnerability risk: Medium

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-4421

CWE-ID: CWE-287

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
IBM WebSphere Application Server Liberty
Server applications / Application servers

Vendor: IBM Corporation

Description

The vulnerability allows a remote user to bypass authentication process.

The vulnerability exists due to an error in when processing authentication requests. A remote user can bypass authentication process and gain unauthorized access to the application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

IBM WebSphere Application Server Liberty: 19.0.0.5 - 20.0.0.4

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External links
https://exchange.xforce.ibmcloud.com/vulnerabilities/180084
https://www.ibm.com/support/pages/node/6205926

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.