title: Rockwell Automation CompactLogix 5370 Uncontrolled Resource Consumption
description:
An attacker could send a crafted HTTP/HTTPS request to render the web server unavailable and/or lead to remote code execution caused by a stack-based buffer overflow vulnerability. A cold restart is required for recovering
CompactLogix 5370 L1, L2, and L3 Controllers, Compact GuardLogix 5370 controllers, and Armor Compact GuardLogix 5370 Controllers Versions 20 - 30 and earlier.
problem types: CWE-400 Uncontrolled Resource Consumption
affected:
{
defaultStatus: unaffected
product: CompactLogix 5370 L1 controllers
vendor: Rockwell Automation
versions:
lessThan: 20 - 30, status: affected, version: 0, versionType: custom
}
{
defaultStatus: unaffected
product: CompactLogix 5370 L2 controllers
vendor: Rockwell Automation
versions:
lessThan: 20 - 30, status: affected, version: 0, versionType: custom
}
{
defaultStatus: unaffected
product: CompactLogix 5370 L3 controllers
vendor: Rockwell Automation
versions:
lessThan: 20 - 30, status: affected, version: 0, versionType: custom
}
{
defaultStatus: unaffected
product: Compact GuardLogix 5370 controllers
vendor: Rockwell Automation
versions:
lessThan: 20 - 30, status: affected, version: 0, versionType: custom
}
{
defaultStatus: unaffected
product: Armor Compact GuardLogix 5370 controllers
vendor: Rockwell Automation
versions:
lessThan: 20 - 30, status: affected, version: 0, versionType: custom
}
solutions:
Rockwell Automation strongly encourages users to apply the latest available version of firmware to keep up to date with the latest features, anomaly fixes, and security improvements. Update firmware to version FRN 31.011 that mitigates the associated risk.
Rockwell Automation also recommends the following:
https://compatibility.rockwellautomation.com/Pages/MultiProductDownload.aspx
*  For EtherNet/IP-based vulnerabilities (ID 1-14), block all traffic to and from outside the Manufacturing Zone by blocking or restricting access to Port 2222/TCP/UDP and Port 44818/TCP/UDP using proper network infrastructure controls, such as firewalls, UTM devices, or other security appliances. For more information on TCP/UDP ports used by Rockwell Automation Products, see Knowledgebase Article ID  898270 https://rockwellautomation.custhelp.com/app/answers/detail/a_id/898270/page/1  (login required).  *  Stratix users can use Device Manager or Studio 5000 Logix Designer to configure access control lists (ACL) to block/restrict ports. See section “Access Control Lists” in  Stratix Managed Switches User Manual, publication 1783-UM007 http://literature.rockwellautomation.com/idc/groups/literature/documents/um/1783-um007_-en-p.pdf , for detailed instructions.
*  For web-based vulnerabilities (ID 15-17), block all traffic from outside the Manufacturing Zone by blocking or restricting access to Port 80/443/TCP.  *  Stratix users can use Device Manager or Studio 5000 Logix Designer to configure ACL’s to block/restrict ports. See section “Access Control Lists” in  Stratix Managed Switches User Manual, publication 1783-UM007 http://literature.rockwellautomation.com/idc/groups/literature/documents/um/1783-um007_-en-p.pdf , for detailed instructions.
*  Utilize proper network infrastructure controls, such as firewalls, to help ensure that SMTP packets from unauthorized sources are blocked.
*  Consult the product documentation for specific features, such as a hardware key-switch setting, which may be used to block unauthorized changes, etc.
*  Use trusted software, software patches, and antivirus/antimalware programs and interact only with trusted websites and attachments.
*  Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the Internet. For further information about the risks of unprotected Internet accessible control systems, please see Knowledgebase Article ID  494865 https://rockwellautomation.custhelp.com/app/answers/detail/a_id/494865/page/1  (login required).
*  When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing that VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize that a VPN is only as secure as the connected devices.
For more information please refer to Rockwell’s Security Advisory:  https://rockwellautomation.custhelp.com/app/answers/detail/a_id/1075979 https://rockwellautomation.custhelp.com/app/answers/detail/a_id/1075979