Vulnerability in Rockwellautomation 1763-L16awa Series A
CVE-2017-7901
A 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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H.
EPSS exploit prediction
EPSS: 0.067 (93.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 93.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.067 · newest: 0.067 · change: 0.000
Affected products
- Rockwellautomation 1763-L16awa Series A
- Rockwellautomation 1763-L16awa Series B
- Rockwellautomation 1763-L16bbb Series A
- Rockwellautomation 1763-L16bbb Series B
- Rockwellautomation 1763-L16bwa Series A
- Rockwellautomation 1763-L16bwa Series B
- Rockwellautomation 1763-L16dwd Series A
- Rockwellautomation 1763-L16dwd Series B
- Rockwellautomation 1766-L32awaa Series A
- Rockwellautomation 1766-L32awaa Series B
Weakness classification (CWE)
References
- www.securitytracker.com/id/1038546 (vdb-entry)
- ics-cert.us-cert.gov/advisories/ICSA-17-115-04 (US Government Resource, Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2017-7901?
- CVE-2017-7901 is a high-severity vulnerability in Rockwellautomation 1763-L16awa Series A, classified under CWE-343. CVSS score: 8.6/10. Published 2017-06-30.
- How severe is CVE-2017-7901?
- High severity. CVSS v3 base score is 8.6 out of 10.