Vulnerability identifier: #VU45825

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-4589

CWE-ID: CWE-502

Exploitation vector: Network

Exploit availability: No

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

Vendor: IBM Corporation

Description

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

The vulnerability exists due to insecure input validation when processing serialized data. A remote attacker can pass specially crafted data to the application and execute arbitrary code on the target system.

The vulnerability only occurs if an undocumented customization has been applied by an administrator.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

IBM WebSphere Application Server: 9.0 - 9.0.5.4, 8.5 - 8.5.5.17, 8.0 - 8.0.0.15, 7.0 - 7.0.0.45

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External links
http://exchange.xforce.ibmcloud.com/vulnerabilities/184585
http://www.ibm.com/support/pages/node/6258333

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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.