On this page

Atomicorp WAF Rule 330702

Rule Summary

  • Rule ID: 330702
  • Status: Active
  • Alert message: Atomicorp.com WAF Rules: CVE-2014-6271 Bash Attack
  • Observed CWEs: None documented
  • Revision: 3
  • Rule severity: Alert (1)
  • Phase: 1 (request headers)
  • Rule action: deny
  • HTTP status: 403
  • Logging: log, auditlog

Description

This rule detects behavior identified by its current alert as “CVE-2014-6271 Bash Attack”. 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-2014-6271

GNU Bash through 4.3 processes trailing strings after function definitions in the values of environment variables, which allows remote attackers to execute arbitrary code via a crafted environment, as demonstrated by vectors involving the ForceCommand feature in OpenSSH sshd, the mod_cgi and mod_cgid modules in the Apache HTTP Server, scripts executed by unspecified DHCP clients, and other situations in which setting the environment occurs across a privilege boundary from Bash execution, aka “ShellShock.” NOTE: the original fix for this issue was incorrect; CVE-2014-7169 has been assigned to cover the vulnerability that is still present after the incorrect fix.

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

No selected related public CVE research notes are currently published.

Documentation Source

  • Original wiki page: WAF 330702
  • Source revision: 5135
  • Source revision date: 2014-09-24