CVE-2017-7901
8.6
Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Exploitability: 3.9 / Impact: 4.7
Source: NVD
Description
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)
Products: Rockwellautomation: 1763 L16awa Series A, 1763 L16awa Series B, 1763 L16bbb Series A, 1763 L16bbb Series B, 1763 L16bwa Series A, 1763 L16bwa Series B, 1763 L16dwd Series A, 1763 L16dwd Series B, 1766 L32awa Series A, 1766 L32awa Series B, 1766 L32awaa Series A, 1766 L32awaa Series B, 1766 L32bwa Series A, 1766 L32bwa Series B, 1766 L32bwaa Series A, 1766 L32bwaa Series B, 1766 L32bxb Series A, 1766 L32bxb Series B, 1766 L32bxba Series A, 1766 L32bxba Series B
Configuration A
| Vulnerable Software | Affected Versions |
|---|---|
| Up to 16.000 | |
| Up to 16.000 | |
| Up to 16.000 | |
| Up to 16.000 | |
| Up to 16.000 | |
| Up to 16.000 | |
| Up to 16.000 | |
| Up to 16.000 |
| Running on/with | Platform Versions |
|---|---|
Rockwellautomation Ab Micrologix Controller | Version 1100 |
Configuration B
| Vulnerable Software | Affected Versions |
|---|---|
| Up to 16.000 | |
| Up to 16.000 | |
| Up to 16.000 | |
| Up to 16.000 | |
| Up to 16.000 | |
| Up to 16.000 | |
| Up to 16.000 | |
| Up to 16.000 | |
| Up to 16.000 | |
| Up to 16.000 | |
| Up to 16.000 | |
| Up to 16.000 |
| Running on/with | Platform Versions |
|---|---|
Rockwellautomation Ab Micrologix Controller | Version 1400 |
Related CWEs
CWE-330
Use of Insufficiently Random Values
The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers.
CWE-343
Predictable Value Range from Previous Values
The product's random number generator produces a series of values which, when observed, can be used to infer a relatively small range of possibilities for the next value that could be generated.
References (4)
Source: ics-cert@hq.dhs.gov
Source: ics-cert@hq.dhs.gov
PatchThird Party AdvisoryUS Government Resource
Source: af854a3a-2127-422b-91ae-364da2661108
Source: af854a3a-2127-422b-91ae-364da2661108
PatchThird Party AdvisoryUS Government Resource
Timeline
No history available yet.