Atomicorp WAF Rule 345118

Rule Summary

• Rule ID: 345118
• Status: Active
• Alert message: Atomicorp.com WAF Rules - Virtual Just In Time Patch: log4j CVE-2021-44228 broad scope obfuscated attack blocked
• Observed CWEs: CWE-20 (1), CWE-400 (1), CWE-502 (1), CWE-917 (2)
• Revision: 5
• Rule severity: Critical (2)
• Phase: 1 (request headers)
• Request surfaces: Request URI
• Rule action: deny
• HTTP status: 403
• Logging: log, auditlog

Description

This rule detects behavior identified by its current alert as “Virtual Just In Time Patch: log4j CVE-2021-44228 broad scope obfuscated attack blocked” in the request URI. It evaluates during the request headers phase and denies matching traffic with HTTP status 403.

CVEs Referenced by This Rule

The current ModSecurity rule metadata explicitly names the following CVEs. These references explain the rule author’s association; they do not claim that the rule is limited to these vulnerabilities or that this is an exhaustive coverage list.

CVE-2021-44228

Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in configuration, log messages, and parameters do not protect against attacker controlled LDAP and other JNDI related endpoints. An attacker who can control log messages or log message parameters can execute arbitrary code loaded from LDAP servers when message lookup substitution is enabled. From log4j 2.15.0, this behavior has been disabled by default. From version 2.16.0 (along with 2.12.2, 2.12.3, and 2.3.1), this functionality has been completely removed. Note that this vulnerability is specific to log4j-core and does not affect log4net, log4cxx, or other Apache Logging Services projects.

• Association: The rule references CVE-2021-44228 in its alert message.
• CVE Record (opens in a new tab)
• NVD (opens in a new tab)

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.