CVE-2017-7901

2017-06-3002:35:00

CWE-343

icscert

www.cve.org

AI Score

8.3

Confidence

High

EPSS

Percentile

15.7%

JSON

A Predictable Value Range from Previous Values issue was discovered in Rockwell Automation Allen-Bradley MicroLogix 1100 programmable-logic controllers 1763-L16AWA, Series A and B, Version 16.00 and prior versions; 1763-L16BBB, Series A and B, Version 16.00 and prior versions; 1763-L16BWA, Series A and B, Version 16.00 and prior versions; and 1763-L16DWD, Series A and B, Version 16.00 and prior versions and Allen-Bradley MicroLogix 1400 programmable logic controllers 1766-L32AWA, Series A and B, Version 16.00 and prior versions; 1766-L32BWA, Series A and B, Version 16.00 and prior versions; 1766-L32BWAA, Series A and B, Version 16.00 and prior versions; 1766-L32BXB, Series A and B, Version 16.00 and prior versions; 1766-L32BXBA, Series A and B, Version 16.00 and prior versions; and 1766-L32AWAA, Series A and B, Version 16.00 and prior versions. Insufficiently random TCP initial sequence numbers are generated, which may allow an attacker to predict the numbers from previous values. This may allow an attacker to spoof or disrupt TCP connections, resulting in a denial of service for the target device.

CNA Affected

[
  {
    "product": "Rockwell Automation Allen-Bradley MicroLogix 1100 and 1400",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "Rockwell Automation Allen-Bradley MicroLogix 1100 and 1400"
      }
    ]
  }
]