Anti-Malware Security and Brute-Force Firewall <= 4.15.22 - Cross-Site Request Forgery

2015-05-25 00:00
James Hooker

Strategic Overview

Status
Patched in 4.15.23
Affected Version
< 4.15.23
CVSS
3.1Low
Weakness type
CWE-352 · Cross-Site Request Forgery (CSRF)
CVE
CVE pending
View all Anti-Malware Security and Brute-Force Firewall vulnerabilities

At a glance

This record tracks a low-severity Cross-Site Request Forgery (CSRF) vulnerability in the Anti-Malware Security and Brute-Force Firewall WordPress plugin, affecting versions < 4.15.23. It carries a CVSS score of 3.1 (reachable over the network). Exploitation requires no authentication. The issue is fixed in version 4.15.23; sites on affected versions should update now. Disclosed May 2015, reported by James Hooker.

Vulnerability Overview

The Anti-Malware Security and Brute-Force Firewall plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 4.15.22. This makes it possible for unauthenticated attackers to consume resource utilization (by performing a large number of scans simultaneously), via forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, and no privileges on the target site.

CWE-352: Cross-Site Request Forgery (CSRF)

Reaching this weakness in Anti-Malware Security and Brute-Force Firewall < 4.15.23 takes a caller who can reach the endpoint. Cross-site request forgery abuses the fact that browsers attach a victim's cookies to any request, so a state-changing action that only checks who you are, not whether you meant to act, can be triggered from another site.

An attacker who gets a logged-in user to load a crafted page can perform that action as them, with the impact scaling to whatever the victim's role is allowed to do. For Anti-Malware Security and Brute-Force Firewall the fix is 4.15.23: builds < 4.15.23 are affected, anything from 4.15.23 onward is not.

Remediation

Update to version 4.15.23, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Anti-Malware Security and Brute-Force Firewall: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Anti-Malware Security and Brute-Force Firewall 4.15.23 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

Related records

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