Buffer overflow in Rockwellautomation Flex I\/o 1794-Aent\/b
CVE-2020-6086
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.043 (90.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 90.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.043 · newest: 0.043 · change: 0.000
Affected products
- Rockwellautomation Flex I\/o 1794-Aent\/b
- Rockwellautomation Flex I\/o 1794-Aent\/b Firmware — versions 4.003
- Allen Bradley — versions Allen-Bradley Flex IO 1794-AENT/B 4.003
Weakness classification (CWE)
References
- talosintelligence.com/vulnerability_reports/TALOS-2020-1007 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-6086?
- CVE-2020-6086 is a high-severity vulnerability in Rockwellautomation Flex I\/o 1794-Aent\/b, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2020-10-14.
- How severe is CVE-2020-6086?
- High severity. CVSS v3 base score is 7.5 out of 10.