Zero-day vulnerability in Oracle WebLogic Server

Deserialization of Untrusted Data
CVE-2019-2729

Oracle has released a security alert, notifying users on in the wild exploitation of the vulnerability.

Vulnerability details

Advisory: SB2019062001 - Remote code execution in Oracle WebLogic Server

Vulnerable component: Oracle WebLogic Server

CVE-ID: CVE-2019-2729

CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C

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

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 within XMLDecoder class. A remote non-authenticated 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.

Note: this vulnerability is being actively exploited in the wild.

Public Exploits:

- Oracle Weblogic 10.3.6.0.0 - Remote Command Execution [Exploit-DB]

External links:

https://www.oracle.com/technetwork/security-advisory/alert-cve-2019-2729-5570780.html

About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.