CVE-2017-7901
published 2017-06-30CVE-2017-7901: A Predictable Value Range from Previous Values issue was discovered in Rockwell Automation Allen-Bradley MicroLogix 1100 programmable-logic controllers…
PriorityP352high8.6CVSS 3.0
AVNACLPRNUINSUCLILAH
EPSS
6.62%
93.0th percentile
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.
Affected
20 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| rockwellautomation | 1763-l16awa_series_a | <= 16.000 | — |
| rockwellautomation | 1763-l16awa_series_b | <= 16.000 | — |
| rockwellautomation | 1763-l16bbb_series_a | <= 16.000 | — |
| rockwellautomation | 1763-l16bbb_series_b | <= 16.000 | — |
| rockwellautomation | 1763-l16bwa_series_a | <= 16.000 | — |
| rockwellautomation | 1763-l16bwa_series_b | <= 16.000 | — |
| rockwellautomation | 1763-l16dwd_series_a | <= 16.000 | — |
| rockwellautomation | 1763-l16dwd_series_b | <= 16.000 | — |
| rockwellautomation | 1766-l32awa_series_a | <= 16.000 | — |
| rockwellautomation | 1766-l32awa_series_b | <= 16.000 | — |
| rockwellautomation | 1766-l32awaa_series_a | <= 16.000 | — |
| rockwellautomation | 1766-l32awaa_series_b | <= 16.000 | — |
| rockwellautomation | 1766-l32bwa_series_a | <= 16.000 | — |
| rockwellautomation | 1766-l32bwa_series_b | <= 16.000 | — |
| rockwellautomation | 1766-l32bwaa_series_a | <= 16.000 | — |
| rockwellautomation | 1766-l32bwaa_series_b | <= 16.000 | — |
| rockwellautomation | 1766-l32bxb_series_a | <= 16.000 | — |
| rockwellautomation | 1766-l32bxb_series_b | <= 16.000 | — |
| rockwellautomation | 1766-l32bxba_series_a | <= 16.000 | — |
| rockwellautomation | 1766-l32bxba_series_b | <= 16.000 | — |
CVSS provenance
nvdv3.08.6HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
nvdv2.09.0CRITICALAV:N/AC:L/Au:N/C:P/I:P/A:C
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GHSA
GHSA-9mhw-mx58-2jch: A Predictable Value Range from Previous Values issue was discovered in Rockwell Automation Allen-Bradley MicroLogix 1100 programmable-logic controller
ghsa_unreviewed·2022-05-17
CVE-2017-7901 [HIGH] CWE-330 GHSA-9mhw-mx58-2jch: A Predictable Value Range from Previous Values issue was discovered in Rockwell Automation Allen-Bradley MicroLogix 1100 programmable-logic controller
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-L3
CISA ICS
Rockwell Automation Allen-Bradley MicroLogix 1100 and 1400
cisa_ics·2017-05-23
Rockwell Automation Allen-Bradley MicroLogix 1100 and 1400
## Archived Content In an effort to keep CISA.gov current, the archive contains outdated information that may not reflect current policy or programs.
ICS Advisory
##
Rockwell Automation Allen-Bradley MicroLogix 1100 and 1400
Last RevisedMay 23, 2017
Alert CodeICSA-17-115-04
## CVSS v3 9.8
ATTENTION: Remotely exploitable/low skill level to exploit.
Vendor: Rockwell Automation
Equipment: Allen-Bradley MicroLogix 1100 and 1400
Vulnerabilities: Predictable Value Range from Previous Values; Reusing a Nonce, Key Pair in Encryption; Information Exposure; Improper Restriction of Excessive Authentication Attempts; Weak Password Requirements
## REPOSTED INFORMATION
This advisory was originally posted to the NCCIC Portal on April 25, 2017, and is
No detection rules found.
No public exploits indexed.
2017-06-30
Published