CVE-2012-6435: rockwell automation 1756-enbt, 1756-eweb, 1768-enbt, 1768-eweb communication modules Improper Access Control

Vulnerability summary

CVE-2012-6435 is a high (CVSS 7.8) Improper Access Control vulnerability in rockwell automation 1756-enbt, 1756-eweb, 1768-enbt, 1768-eweb communication modules. EPSS estimates a 33.50% chance of exploitation in the next 30 days, higher than 98.3% of scored vulnerabilities.

Timeline

1. 24-01-2013
   PublishedVulnerability first disclosed.
2. 03-06-2026
   Last modifiedVulnerability information updated.

Description

When an affected product receives a valid CIP message from an unauthorized or unintended source to Port 2222/TCP, Port 2222/UDP, Port 44818/TCP, or Port 44818/UDP that instructs the CPU to stop logic execution and enter a fault state, a DoS can occur. This situation could cause loss of availability and a disruption of communication with other connected devices. Rockwell Automation EtherNet/IP products; 1756-ENBT, 1756-EWEB, 1768-ENBT, and 1768-EWEB communication modules; CompactLogix L32E and L35E controllers; 1788-ENBT FLEXLogix adapter; 1794-AENTR FLEX I/O EtherNet/IP adapter; ControlLogix 18 and earlier; CompactLogix 18 and earlier; GuardLogix 18 and earlier; SoftLogix 18 and earlier; CompactLogix controllers 19 and earlier; SoftLogix controllers 19 and earlier; ControlLogix controllers 20 and earlier; GuardLogix controllers 20 and earlier; and MicroLogix 1100 and 1400

• CWE-284Improper Access ControlThe product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
• CWE-399Resource Management ErrorsWeaknesses in this category are related to improper management of system resources.