#VU27477 Deserialization of Untrusted Data in Oracle WebLogic Server - CVE-2020-2883

Vulnerability identifier: #VU27477

Vulnerability risk: High

CVSSv4.0: 9.3 [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:A/U:Amber]

CVE-ID: CVE-2020-2883

CWE-ID: CWE-502

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Oracle WebLogic Server
Server applications / Application servers

Vendor: Oracle

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 T3 Protocol data in the Oracle WebLogic Server. A remote attacker can pass specially crafted data to the application and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Oracle WebLogic Server: 10.3.6.0.0 - 12.2.1.4.0

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External links
https://www.oracle.com/security-alerts/cpuapr2020.html
https://www.zerodayinitiative.com/advisories/ZDI-20-504/

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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?

Yes. This vulnerability is being exploited in the wild.