CVE-2017-7902 Information

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.

CVSS Vector

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

Reference

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

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8