Remote code execution in Oracle WebLogic Server

1) Deserialization of untrusted data

EUVDB-ID: #VU10055

Risk: High

CVSSv3.1: 10 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:H/RL:U/RC:C]

CVE-ID: CVE-2018-2628

CWE-ID: CWE-502 - Deserialization of Untrusted Data

Exploit availability: Yes

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

External links

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

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.