Predictable Initial Sequence Numbers in Allen-Bradley Programmable Logic Controllers by Rockwell Automation
CVE-2017-7901

8.6HIGH

Key Information:

Vendor

Rockwellautomation

Status
Rockwell Automation Allen-bradley Micrologix 1100 And 1400
Vendor
CVE Published:
30 June 2017

What is CVE-2017-7901?

Rockwell Automation's Allen-Bradley MicroLogix and ControlLogic programmable logic controllers were found to generate insufficiently random TCP initial sequence numbers. This predictability enables attackers to potentially spoof or disrupt TCP connections, which can lead to denial of service for the affected devices. This vulnerability affects specific models of the MicroLogix 1100 and 1400 series, undermining the overall security of these control systems.

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Affected Version(s)

Rockwell Automation Allen-Bradley MicroLogix 1100 and 1400 Rockwell Automation Allen-Bradley MicroLogix 1100 and 1400

References

http://www.securitytracker.com/id/1038546
vdb-entryx_refsource_SECTRACK
https://ics-cert.us-cert.gov/advisories/ICSA-17-115-04
x_refsource_MISC

CVSS V3.1

Score:
8.6
Severity:
HIGH
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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