Arbitrary file upload in Liferay CMS

1) Arbitrary file upload

EUVDB-ID: #VU12397

Risk: High

CVSSv3.1: 8.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-10795

CWE-ID: CWE-434 - Unrestricted Upload of File with Dangerous Type

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to an error in FCKeditor configuration, which can lead to unauthorized upload of files via the browser/liferay/browser.html?Type= and html/js/editor/fckeditor/editor/filemanager/browser/liferay/browser.html URLs. A remote unauthenticated attacker can send a specially crafted HTTP GET request to the affected scripts and upload malicious files to the server. The uploaded file will be automatically executed within the product's environment.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Liferay Enterprise Portal: 2.0 - 6.2.5 GA6

External links

http://cxsecurity.com/issue/WLB-2018050029

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. However, proof of concept for this vulnerability is available.