CVE-2012-6439: Rockwell Automation ControlLogix PLC Improper Access Control

Published Jan 24, 2013
·
Updated

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 allow remote attackers to cause a denial of service (control and communication outage) via a CIP message that modifies the (1) configuration or (2) network parameters.

Other sources

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 changes the product’s configuration and network parameters, a DoS condition 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

— 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
Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is the severity of CVE-2012-6439?

CVE-2012-6439 is classified as a medium severity vulnerability.

2

How do I fix CVE-2012-6439?

To fix CVE-2012-6439, update the affected Rockwell Automation EtherNet/IP products and ensure the latest firmware patches are applied.

3

What products are affected by CVE-2012-6439?

CVE-2012-6439 affects various Rockwell Automation EtherNet/IP products including ControlLogix, GuardLogix, and CompactLogix controllers.

4

Is CVE-2012-6439 exploitable remotely?

Yes, CVE-2012-6439 can potentially be exploited remotely by an attacker.

5

What type of vulnerability is CVE-2012-6439?

CVE-2012-6439 is a security vulnerability associated with improper input validation in Rockwell Automation products.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203