Vulnerability CVE-2017-7902
Published: 2017-06-29   Modified: 2017-06-30

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.

Type:

CWE-330

 (Use of Insufficiently Random Values)

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
Rockwellautomation -> 1766-l32bwa series b 
Rockwellautomation -> 1766-l32bxba series b 
Rockwellautomation -> 1763-l16bwa series b 
Rockwellautomation -> 1766-l32bwaa series a 
Rockwellautomation -> 1766-l32bwa series a 
Rockwellautomation -> 1763-l16dwd series b 
Rockwellautomation -> 1763-l16bwa series a 
Rockwellautomation -> 1763-l16dwd series a 
Rockwellautomation -> 1766-l32awa series b 
Rockwellautomation -> 1766-l32awaa series a 
Rockwellautomation -> 1763-l16bbb series a 
Rockwellautomation -> 1766-l32awaa series b 
Rockwellautomation -> 1763-l16awa series a 
Rockwellautomation -> 1763-l16awa series b 
Rockwellautomation -> 1763-l16bbb series b 
Rockwellautomation -> 1766-l32bwaa series b 
Rockwellautomation -> 1766-l32bxb series b 
Rockwellautomation -> 1766-l32awa series a 
Rockwellautomation -> 1766-l32bxba series a 
Rockwellautomation -> 1766-l32bxb series a 

 References:
http://www.securitytracker.com/id/1038546
https://ics-cert.us-cert.gov/advisories/ICSA-17-115-04
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