CVE-2012-6436: Rockwell Automation ControlLogix PLC Improper Input Validation

Published Jan 24, 2013
·
Updated

Buffer overflow in 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 allows remote attackers to cause a denial of service (CPU crash and communication outage) via a malformed CIP packet.

Other sources

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 CPU 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

— MITRE

Affected Software

18 affected components
rockwellautomation Controllogix Controllers<=20
rockwellautomation Guardlogix Controllers<=20
rockwellautomation Micrologix<=1100
rockwellautomation Micrologix<=1400
rockwellautomation Softlogix Controllers<=19
rockwellautomation 1756-enbt
rockwellautomation 1756-eweb
rockwellautomation 1768-enbt
rockwellautomation 1768-eweb
rockwellautomation 1794-aentr Flex I\/o Ethernet\/ip Adapter
rockwellautomation Compactlogix<=18
rockwellautomation Compactlogix Controllers<=19
rockwellautomation Compactlogix L32e Controller
rockwellautomation Compactlogix L35e Controller
rockwellautomation Controllogix<=18
rockwellautomation Flexlogix 1788-enbt Adapter
rockwellautomation Guardlogix<=18
rockwellautomation Softlogix<=18

Remediation

Information

According to Rockwell, any of the above products that become affected by a vulnerability can be reset by rebooting or power cycling the affected product. After the reboot, the affected product may require some reconfiguration. To mitigate the vulnerabilities, Rockwell has developed and released security patches on July 18, 2012, to address each of the issues. To download and install the patches please refer to Rockwell’s Advisories at: 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 For more information on security with Rockwell Automation products, please refer to Rockwell’s Security Advisory Index http://rockwellautomation.custhelp.com/app/answers/detail/a_id/54102 .

Event History

Jan 24, 2013
CVE Published
via MITRE·09:00 PM
Data Sourced
via MITRE·09:00 PM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·09:55 PM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2012-6436?

CVE-2012-6436 is rated as critical due to the potential for remote code execution through buffer overflow.

2

How do I fix CVE-2012-6436?

To fix CVE-2012-6436, update the affected Rockwell Automation products to the latest firmware version provided by the vendor.

3

What are the affected products of CVE-2012-6436?

Products affected by CVE-2012-6436 include Rockwell Automation EtherNet/IP communication modules and various controllers like CompactLogix and ControlLogix.

4

What is the impact of CVE-2012-6436?

The impact of CVE-2012-6436 can allow unauthorized remote access and control over affected systems, potentially leading to system failures.

5

Is there an exploit available for CVE-2012-6436?

Yes, CVE-2012-6436 is classed as having exploits available, making it a significant concern for industrial automation environments.

Company

Resources

Contact

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