#VU10055 Deserialization of untrusted data in Oracle WebLogic Server - CVE-2018-2628

Vulnerability identifier: #VU10055

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-2018-2628

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 weakness exists in Weblogic server WLS Core Components due to deserialization of untrusted data. A remote attacker can use T3 protocol and execute arbitrary code with elevated privileges.

The vulnerability is been actively exploited in the wild.

Mitigation
The vendor has issued an incomplete security fix that can be bypassed and allows to exploit the vulnerability.

Vulnerable software versions

Oracle WebLogic Server: 10.3.6.0.0 - 12.2.1.3.0

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External links
https://github.com/brianwrf/CVE-2018-2628
https://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html
https://mp.weixin.qq.com/s/nYY4zg2m2xsqT0GXa9pMGA
https://www.bleepingcomputer.com/news/security/hackers-scan-the-web-for-vulnerable-weblogic-servers-...

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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.