CVE-2017-7901

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Summary

CVECVE-2017-7901
StatePUBLISHED
Assignericscert
Source PriorityCVE Program / NVD first with legacy fallback
Published2017-06-30 03:29:00 UTC
Updated2025-04-20 01:37:25 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v3.0 8.6 HIGH from [email protected]

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Problem Types: CWE-343 | CWE-330 | CWE-343 CWE-343

VersionSourceTypeScoreSeverityVector
3.0[email protected]Primary8.6HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
2.0[email protected]Primary9AV:N/AC:L/Au:N/C:P/I:P/A:C

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
High

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Complete

AV:N/AC:L/Au:N/C:P/I:P/A:C

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Rockwellautomation 1763-l16awa Series A All All All All
Application Rockwellautomation 1763-l16awa Series B All All All All
Application Rockwellautomation 1763-l16bbb Series A All All All All
Application Rockwellautomation 1763-l16bbb Series B All All All All
Application Rockwellautomation 1763-l16bwa Series A All All All All
Application Rockwellautomation 1763-l16bwa Series B All All All All
Application Rockwellautomation 1763-l16dwd Series A All All All All
Application Rockwellautomation 1763-l16dwd Series B All All All All
Application Rockwellautomation 1766-l32awaa Series A All All All All
Application Rockwellautomation 1766-l32awaa Series B All All All All
Application Rockwellautomation 1766-l32awa Series A All All All All
Application Rockwellautomation 1766-l32awa Series B All All All All
Application Rockwellautomation 1766-l32bwaa Series A All All All All
Application Rockwellautomation 1766-l32bwaa Series B All All All All
Application Rockwellautomation 1766-l32bwa Series A All All All All
Application Rockwellautomation 1766-l32bwa Series B All All All All
Application Rockwellautomation 1766-l32bxba Series A All All All All
Application Rockwellautomation 1766-l32bxba Series B All All All All
Application Rockwellautomation 1766-l32bxb Series A All All All All
Application Rockwellautomation 1766-l32bxb Series B All All All All
Hardware Rockwellautomation Ab Micrologix Controller 1100 All All All
Hardware Rockwellautomation Ab Micrologix Controller 1400 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na Rockwell Automation Allen-Bradley MicroLogix 1100 And 1400 affected Rockwell Automation Allen-Bradley MicroLogix 1100 and 1400 Not specified

References

ReferenceSourceLinkTags
Rockwell Automation Allen-Bradley MicroLogix 1100 and 1400 | CISA af854a3a-2127-422b-91ae-364da2661108 ics-cert.us-cert.gov Patch, Third Party Advisory, US Government Resource
Rockwell Automation MicroLogix PLC Multiple Flaws Let Remote Users Guess Passwords, Replay Commands, and Deny Service and Let Local Users Obtain Passwords - SecurityTracker af854a3a-2127-422b-91ae-364da2661108 www.securitytracker.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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