Atomicorp WAF Rule 340163

Rule Summary

• Rule ID: 340163
• Status: Active
• Alert message: Atomicorp.com WAF Rules: Remote File Injection Attack Blocked (Unauthorized URL detected as argument)
• Observed CWEs: CWE-20 (9), CWE-22 (5), CWE-24 (1), CWE-29 (2), CWE-74 (1), CWE-79 (3), CWE-93 (1), CWE-94 (5), CWE-180 (1), CWE-184 (2), CWE-200 (1), CWE-209 (1), CWE-269 (1), CWE-284 (1), CWE-285 (1), CWE-287 (2), CWE-306 (6), CWE-345 (2), CWE-350 (1), CWE-352 (1), CWE-367 (4), CWE-425 (1), CWE-434 (4), CWE-441 (4), CWE-444 (1), CWE-470 (2), CWE-501 (1), CWE-502 (1), CWE-552 (1), CWE-601 (31), CWE-610 (1), CWE-625 (1), CWE-639 (2), CWE-749 (1), CWE-829 (1), CWE-862 (3), CWE-918 (244), CWE-1188 (1)
• Revision: 309
• Rule severity: Critical (2)
• Phase: 2 (request body)
• Request surfaces: Request arguments, JSON request data, SOAP request data, XML request data
• Rule action: deny
• HTTP status: 403
• Logging: log, auditlog

Description

This rule detects Remote File Injection attempts that are encoded. These types of attacks work by tricking an application into download software into itself, which will allow the attacker to download any software they want unto the victims systems, thereby compromising it.

This rules work by detecting the use of a URL as an argument, and tries to detect encoding methods that may used to hide this.

False Positives

A false positive can occur when an application legitimately sets an argument to a URL, and does this using a previously unknown argument or method to store this URL. The rules contain a large library of known web applications and safe methods for using URLs, and can detect known safe methods and ignore them. However it is possible for a new or custom application to do this in an unknown manner and incorrectly trigger this rule. Some applications may also legitimately use encoding methods.

It is not recommended that you disable this rule if you have a false positive. If you believe this is a false positive, please report this to our security team to determine if this is a legitimate case, or if its clever attack on your system. Instructions to report false positives are detailed on the Reporting False Positives wiki page. If it is a false positive, we will fix the issue in the rules and get a release out to you promptly.

Tuning Guidance

If you know that this behavior is acceptable for your application, you can tune it by identifying the argument that is being triggered, and specifically allowing that argument for that application to allow a URL. Please see the Tuning the Atomicorp WAF Rules page for basic information.

Similar Rules

WAF_340162

WAF_340165

Selected Related CVEs

This is a selected list of documented research observations, not an exhaustive coverage matrix. Absence of a CVE does not imply absence of protection.

Observed CWEs

These CWEs are recorded on published CVEs in the selected observations associated with this rule. They are observational relationships, not a claim that the rule universally blocks every vulnerability assigned to a CWE.

Documentation Source

• Original wiki page: WAF 340163
• Source revision: 3857
• Source revision date: 2013-08-16