WP Support Plus Responsive Ticket System <= 8.0.7 - Arbitrary File Upload

2017-11-11 00:00
Anonymous

Strategic Overview

Status
Patched in 8.0.8
Affected Plugin
WP Support Plus Responsive Ticket System
Affected Version
< 8.0.8
CVSS
8.8High
Weakness type
CWE-434 · Unrestricted Upload of File with Dangerous Type
CVE
CVE pending
View all WP Support Plus Responsive Ticket System vulnerabilities

At a glance

This record tracks a high-severity Unrestricted Upload of File with Dangerous Type vulnerability in the WP Support Plus Responsive Ticket System WordPress plugin, affecting versions < 8.0.8. It carries a CVSS score of 8.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). The issue is fixed in version 8.0.8; sites on affected versions should update now. Disclosed November 2017.

Vulnerability Overview

The WP Support Plus Responsive Ticket System plugin for WordPress is vulnerable to arbitrary file uploads in versions up to, and including 8.0.7. This is due to insufficient file type validation on the wpsp_upload_attachment AJAX action which makes it possible for authenticated attackers to upload arbitrary files that could be used to obtain remote code execution.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.

CWE-434: Unrestricted Upload of File with Dangerous Type

Reaching this weakness in WP Support Plus Responsive Ticket System < 8.0.8 takes a caller who can reach the endpoint. An unrestricted file upload lets a caller store a file whose type or destination the application does not properly constrain.

If an uploaded file lands anywhere the server will execute, the flaw becomes remote code execution and the site should be treated as fully compromised. For WP Support Plus Responsive Ticket System the fix is 8.0.8: builds < 8.0.8 are affected, anything from 8.0.8 onward is not.

Remediation

Update to version 8.0.8, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to WP Support Plus Responsive Ticket System: WordSec's web application firewall inspects request payloads before WordPress loads them. Classes like this one can leave something behind, so the staged malware scanner is the second half: it looks for dropped files and modified code rather than for the request that created them. None of that substitutes for the fix: WP Support Plus Responsive Ticket System 8.0.8 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Scanner
  • Alerts

External References

https://www.wordfence.com/threat-intel/vulnerabilities/id/1de36458-d7e5-43cf-af40-0fd7a6eea5bb

Related records

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