PT-2017-17999 · Rockwell Automation · Micrologix 1100

Published 2017-09-20 · Updated 2019-10-09 · CVE-2017-7924

Positive Technologies (AI Summary)

CVSS v2.0

5.0

Medium

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Name of the Vulnerable Software and Affected Versions Rockwell Automation MicroLogix 1100 controllers version 1763-L16BWA Rockwell Automation MicroLogix 1100 controllers version 1763-L16AWA Rockwell Automation MicroLogix 1100 controllers version 1763-L16BBB Rockwell Automation MicroLogix 1100 controllers version 1763-L16DWD

Description An issue with improper input validation was found, allowing a remote, unauthenticated attacker to send a specially crafted Programmable Controller Communication Commands (PCCC) packet, potentially causing the controller to enter a denial-of-service condition.

Recommendations For version 1763-L16BWA, apply the recommended fix from the vendor to prevent the controller from entering a DoS condition. For version 1763-L16AWA, apply the recommended fix from the vendor to prevent the controller from entering a DoS condition. For version 1763-L16BBB, apply the recommended fix from the vendor to prevent the controller from entering a DoS condition. For version 1763-L16DWD, apply the recommended fix from the vendor to prevent the controller from entering a DoS condition. As a temporary workaround, consider restricting access to the PCCC packet until a patch is available.

Exploit

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CVE-2017-7924

Affected Products

Micrologix 1100

References · 4

• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/dos/scada/allen_bradley_pccc.rb · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2017-7924 · Security Note
• http://securityfocus.com/bid/99622 · Note
• https://ics-cert.us-cert.gov/advisories/ICSA-17-138-03 · Note