CVE-2017-7902

Description

A "Reusing a Nonce, Key Pair in Encryption" 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. The affected product reuses nonces, which may allow an attacker to capture and replay a valid request until the nonce is changed.

Categories

9.8
CVSS
Severity: Critical
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.04%
Third-Party Advisory securitytracker.com Third-Party Advisory us-cert.gov
Affected: n/a Rockwell Automation Allen-Bradley MicroLogix 1100 and 1400
Published at:
Updated at:

References

Link Tags
http://www.securitytracker.com/id/1038546 third party advisory vdb entry
https://ics-cert.us-cert.gov/advisories/ICSA-17-115-04 patch third party advisory us government resource

Frequently Asked Questions

What is the severity of CVE-2017-7902?
CVE-2017-7902 has been scored as a critical severity vulnerability.
How to fix CVE-2017-7902?
To fix CVE-2017-7902, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-7902 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2017-7902 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-7902?
CVE-2017-7902 affects n/a Rockwell Automation Allen-Bradley MicroLogix 1100 and 1400.
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