Vulnerability Details : CVE-2017-7902
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.
Products affected by CVE-2017-7902
- cpe:2.3:a:rockwellautomation:1763-l16awa_series_b:*:*:*:*:*:*:*:*
- cpe:2.3:a:rockwellautomation:1763-l16bbb_series_b:*:*:*:*:*:*:*:*
- cpe:2.3:a:rockwellautomation:1763-l16bwa_series_b:*:*:*:*:*:*:*:*
- cpe:2.3:a:rockwellautomation:1763-l16dwd_series_b:*:*:*:*:*:*:*:*
- cpe:2.3:a:rockwellautomation:1763-l16awa_series_a:*:*:*:*:*:*:*:*
- cpe:2.3:a:rockwellautomation:1763-l16bbb_series_a:*:*:*:*:*:*:*:*
- cpe:2.3:a:rockwellautomation:1763-l16bwa_series_a:*:*:*:*:*:*:*:*
- cpe:2.3:a:rockwellautomation:1763-l16dwd_series_a:*:*:*:*:*:*:*:*
- cpe:2.3:a:rockwellautomation:1766-l32awaa_series_a:*:*:*:*:*:*:*:*
- cpe:2.3:a:rockwellautomation:1766-l32awaa_series_b:*:*:*:*:*:*:*:*
- cpe:2.3:a:rockwellautomation:1766-l32bxba_series_a:*:*:*:*:*:*:*:*
- cpe:2.3:a:rockwellautomation:1766-l32bxba_series_b:*:*:*:*:*:*:*:*
- cpe:2.3:a:rockwellautomation:1766-l32bxb_series_a:*:*:*:*:*:*:*:*
- cpe:2.3:a:rockwellautomation:1766-l32bxb_series_b:*:*:*:*:*:*:*:*
- cpe:2.3:a:rockwellautomation:1766-l32bwaa_series_a:*:*:*:*:*:*:*:*
- cpe:2.3:a:rockwellautomation:1766-l32bwaa_series_b:*:*:*:*:*:*:*:*
- cpe:2.3:a:rockwellautomation:1766-l32bwa_series_a:*:*:*:*:*:*:*:*
- cpe:2.3:a:rockwellautomation:1766-l32bwa_series_b:*:*:*:*:*:*:*:*
- cpe:2.3:a:rockwellautomation:1766-l32awa_series_a:*:*:*:*:*:*:*:*
- cpe:2.3:a:rockwellautomation:1766-l32awa_series_b:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2017-7902
0.08%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 34 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2017-7902
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:P/I:N/A:N |
10.0
|
2.9
|
NIST | |
|
9.8
|
CRITICAL | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST |
CWE ids for CVE-2017-7902
-
Nonces should be used for the present occasion and only once.Assigned by: ics-cert@hq.dhs.gov (Secondary)
-
The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers.Assigned by: nvd@nist.gov (Primary)
References for CVE-2017-7902
-
https://ics-cert.us-cert.gov/advisories/ICSA-17-115-04
Rockwell Automation Allen-Bradley MicroLogix 1100 and 1400 | CISAPatch;Third Party Advisory;US Government Resource
-
http://www.securitytracker.com/id/1038546
Rockwell Automation MicroLogix PLC Multiple Flaws Let Remote Users Guess Passwords, Replay Commands, and Deny Service and Let Local Users Obtain Passwords - SecurityTrackerThird Party Advisory;VDB Entry
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