SB2018070211 - Arbitrary file upload in WP Live Chat Support plugin for WordPress

Description

This security bulletin contains information about 1 vulnerability.

1) Arbitrary file upload (CVE-ID: CVE-2018-12426)

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

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to absent validation of file extension when uploading files via v1/remote_upload request. A remote attacker can upload and execute arbitrary .php file on the server and execute it.

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

Remediation

Install update from vendor's website.

References

• https://github.com/CodeCabin/wp-live-chat-support/blob/master/readme.txt
• https://github.com/RiieCco/write-ups/tree/master/CVE-2018-12426