Atomicorp WAF Rule 340195

Rule Summary

• Rule ID: 340195
• Status: Active
• Alert message: Atomicorp.com WAF Rules: Attack Blocked - Base64 Encoded PHP function in Argument - this may be an attack.
• Observed CWEs: CWE-290 (1)
• Revision: 4
• Rule severity: Critical (2)
• Phase: 2 (request body)
• Request surfaces: Request URI, Request arguments, JSON request data, SOAP request data
• Rule action: deny
• HTTP status: 403
• Logging: log, auditlog

Description

This rule detects when base64 encoded PHP code is found in an untrusted argument in a POST request from a client. This means that the client is sending base64 encoded PHP code to your server. If this is not a trusted user using a trusted web application, this is an attack on your system.

Troubleshooting

False Positives

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. Do not disable this rule.

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.

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 340195
• Source revision: 6049
• Source revision date: 2020-08-24