Liferay Portal - Remote Code Execution CVE-2020-7961

Liferay Portal server is vulnerable to CVE-2020-7961, a Remote Code Injection vulnerability affecting multiple methods found in the /api/jsonws endpoint.

The root cause of this vulnerability is the improper deserialization of untrusted data provided by the user. A remote unauthenticated attacker can perform remote class loading through deserialization via a malicious machine that serves specially crafted Java class files that run arbitrary code on the target.

The risk exists that a remote unauthenticated attacker can fully compromise the Liferay Server in order to steal confidential information, install ransomware or pivot to the internal network.

Sniper can gain unauthenticated Remote Code Execution on the target system and extract multiple artefacts as evidence.

Apply the latest updates for the Liferay Server.