What’s Vulnerable › Vulnerabilities

CVE-2012-6438: Rockwell Automation ControlLogix PLC Improper Input Validation

• Severity: high (CVSS 7.8 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 27.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2013-01-24 · updated 2026-06-16
• Weakness: CWE-119

Description

The device does not properly validate the data being sent to the buffer. An attacker can send a malformed CIP packet to Port 2222/TCP, Port 2222/UDP, Port 44818/TCP, or Port 44818/UDP, which creates a buffer overflow and causes the NIC to crash. Successful exploitation of this vulnerability could cause loss of availability and a disruption in communications 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

Affected products

• Rockwell Automation 1756-ENBT: all versions
• Rockwellautomation 1756-Eweb: all versions
• Rockwellautomation 1768-Enbt: all versions
• Rockwellautomation 1768-Eweb: all versions
• Rockwellautomation 1794-Aentr Flex I/O Ethernet/Ip Adapter: all versions
• Rockwellautomation Compactlogix: through 18
• Rockwellautomation Compactlogix Controllers: through 19
• Rockwellautomation Compactlogix L32E Controller: all versions
• Rockwellautomation Compactlogix L35E Controller: all versions
• Rockwellautomation Controllogix: through 18
• Rockwellautomation Controllogix Controllers: through 20
• Rockwellautomation Flexlogix 1788-Enbt Adapter: all versions
• Rockwellautomation Guardlogix: through 18
• Rockwellautomation Guardlogix Controllers: through 20
• Rockwell Automation MicroLogix: through 1100; through 1400
• Rockwellautomation Softlogix: through 18
• Rockwellautomation Softlogix Controllers: through 19

References

• http://rockwellautomation.custhelp.com/app/answers/detail/a_id/54102
• https://rockwellautomation.custhelp.com/app/answers/detail/a_id/470154
• https://rockwellautomation.custhelp.com/app/answers/detail/aid/470155
• https://rockwellautomation.custhelp.com/app/answers/detail/aid/470156
• https://www.cisa.gov/news-events/ics-advisories/icsa-13-011-03
• http://www.us-cert.gov/control_systems/pdf/ICSA-13-011-03.pdf

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