National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2017-7901 Detail

Current 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.

Source:  MITRE
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 8.6 HIGH
Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H (V3 legend)
Impact Score: 4.7
Exploitability Score: 3.9


Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): Low
Integrity (I): Low
Availability (A): High

CVSS v2.0 Severity and Metrics:

Base Score: 9.0 HIGH
Vector: (AV:N/AC:L/Au:N/C:P/I:P/A:C) (V2 legend)
Impact Subscore: 8.5
Exploitability Subscore: 10.0


Access Vector (AV): Network
Access Complexity (AC): Insufficient_Info
Authentication (AU): None
Confidentiality (C): Partial
Integrity (I): Partial
Availability (A): Complete
Additional Information:
Allows unauthorized disclosure of information
Allows unauthorized modification
Allows disruption of service

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to nvd@nist.gov.

Hyperlink Resource
http://www.securitytracker.com/id/1038546
https://ics-cert.us-cert.gov/advisories/ICSA-17-115-04 Patch Third Party Advisory US Government Resource

Technical Details

Vulnerability Type (View All)

  • Use of Insufficiently Random Values (CWE-330)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:rockwellautomation:1763-l16awa_series_a:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
16.000
 cpe:2.3:a:rockwellautomation:1763-l16awa_series_b:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
16.000
 cpe:2.3:a:rockwellautomation:1763-l16bbb_series_a:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
16.000
 cpe:2.3:a:rockwellautomation:1763-l16bbb_series_b:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
16.000
 cpe:2.3:a:rockwellautomation:1763-l16bwa_series_a:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
16.000
 cpe:2.3:a:rockwellautomation:1763-l16bwa_series_b:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
16.000
 cpe:2.3:a:rockwellautomation:1763-l16dwd_series_a:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
16.000
 cpe:2.3:a:rockwellautomation:1763-l16dwd_series_b:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
16.000
Running on/with
 cpe:2.3:h:rockwellautomation:ab_micrologix_controller:1100:*:*:*:*:*:*:*
     Show Matching CPE(s)

Configuration 2 ( hide )
 cpe:2.3:a:rockwellautomation:1766-l32awa_series_a:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
16.000
 cpe:2.3:a:rockwellautomation:1766-l32awa_series_b:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
16.000
 cpe:2.3:a:rockwellautomation:1766-l32awaa_series_a:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
16.000
 cpe:2.3:a:rockwellautomation:1766-l32awaa_series_b:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
16.000
 cpe:2.3:a:rockwellautomation:1766-l32bwa_series_a:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
16.000
 cpe:2.3:a:rockwellautomation:1766-l32bwa_series_b:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
16.000
 cpe:2.3:a:rockwellautomation:1766-l32bwaa_series_a:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
16.000
 cpe:2.3:a:rockwellautomation:1766-l32bwaa_series_b:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
16.000
 cpe:2.3:a:rockwellautomation:1766-l32bxb_series_a:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
16.000
 cpe:2.3:a:rockwellautomation:1766-l32bxb_series_b:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
16.000
 cpe:2.3:a:rockwellautomation:1766-l32bxba_series_a:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
16.000
 cpe:2.3:a:rockwellautomation:1766-l32bxba_series_b:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
16.000
Running on/with
 cpe:2.3:h:rockwellautomation:ab_micrologix_controller:1400:*:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

2 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-7901
NVD Published Date:
06/29/2017
NVD Last Modified:
07/07/2017