CVE-2020-6086 Denial of service in Allen Bradley
A specially crafted network request causes a loss of communications in Allen-Bradley Flex IO devices, requiring a physical power cycle to restore service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-6086?
CVE-2020-6086 is a high-severity denial of service vulnerability in Allen Bradley, published on 14 Oct 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An exploitable denial of service vulnerability exists in the ENIP Request Path Data Segment functionality of Allen-Bradley Flex IO 1794-AENT/B. A specially crafted network request can cause a loss of communications with the device resulting in denial-of-service. An attacker can send a malicious packet to trigger this vulnerability.If the Simple Segment Sub-Type is supplied, the device treats the byte following as the Data Size in words. When this value represents a size greater than what remains in the packet data, the device enters a fault state where communication with the device is lost and a physical power cycle is required.
Weakness: CWE-120
Which versions are affected by CVE-2020-6086?
It affects 1 product.
Products include Rockwellautomation Flex I\/O 1794-Aent\/B Firmware.
How do I fix CVE-2020-6086?
No fix has been published for CVE-2020-6086 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-6086 being exploited?
There is no known exploitation of CVE-2020-6086 in the wild and no public exploit code.
Other vulnerabilities in Allen Bradley
Sources
Also known as GHSA-gwgq-76m9-ffw6.