Remote code execution in Liferay Portal

1) Deserialization of Untrusted Data

EUVDB-ID: #VU49689

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-7961

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 vulnerability exists due to insecure input validation when processing serialized data within the JSON web services (JSONWS). 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

Liferay Enterprise Portal: before 7.2.1

External links

http://packetstormsecurity.com/files/157254/Liferay-Portal-Java-Unmarshalling-Remote-Code-Execution.html
http://packetstormsecurity.com/files/158392/Liferay-Portal-Remote-Code-Execution.html
http://portal.liferay.dev/learn/security/known-vulnerabilities
http://portal.liferay.dev/learn/security/known-vulnerabilities/-/asset_publisher/HbL5mxmVrnXW/content/id/117954271

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?

No. We are not aware of malware exploiting this vulnerability.