Rockwell Automation 1783-NATR memory corruption flaw
Free public brief. The indicators, the detections with Splunk SPL already written (plus Elastic and KQL where they apply), and a Slack alert the next time this touches a vendor you run are in the app — free account, no card.
Memory allocator overflow in Rockwell Automation 1783-NATR network appliance causes memory corruption; patch to version 1.007.
Rockwell Automation 1783-NATR network appliance versions prior to 1.007 contain a memory allocator overflow vulnerability (CVE-2020-28895) originating from a platform-dependent third-party component in Wind River VxWorks. The flaw exists in the calloc() memory allocator, which miscalculates buffer sizes during allocation, causing the actual memory allocated to be smaller than requested. This leads to memory corruption when the application writes to the undersized buffer. The vulnerability is remotely exploitable over the network with low attack complexity and requires no authentication or user interaction.
The 1783-NATR is a network appliance deployed worldwide in critical manufacturing environments. Rockwell Automation has released version 1.007 as the corrected version. CISA reports no known public exploitation targeting this vulnerability at the time of advisory publication. Organizations unable to patch immediately should isolate the device behind firewalls, minimize internet exposure, and employ network segmentation between control system and business networks. When remote access is necessary, VPN or other secure tunneling methods should be used, though defenders should verify VPN infrastructure is current and secure.
Mentioned in this report
Source reporting: https://www.cisa.gov/news-events/ics-advisories/icsa-25-252-09
What this brief leaves out
This page is the free tier: the write-up, the severity, the names. In the app the same report carries its extracted indicators, its detections (Splunk SPL already written, plus Elastic and Microsoft KQL where they apply), the actors and CVEs it names as live profiles, and the vendor research on the same campaign — the primary source the news paraphrased, cited and read directly.
It sits in a corpus of 13,854 reports from 146 sources, 614 of them written in the last seven days, and it grows through the day.
A new account starts with three days of all of it, no card, then keeps the government and CERT reporting free. Name the vendors you run and Slack hears about the reports that touch them — about forty a week that are yours, not the four hundred that are not.
Create a free account What it costs