Buffer overflow in Rockwellautomation Flex I\/o 1794-Aent\/b
CVE-2020-6087
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 ANSI Extended Symbol 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
EPSS: 0.036 (88.1th percentile) — read the EPSS interpretation.
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.
Affected products
- Rockwellautomation Flex_i\/o_1794-aent\/b
- Rockwellautomation Flex_i\/o_1794-aent\/b_firmware — versions 4.003
- N/a Allen Bradley — versions Allen-Bradley Flex IO 1794-AENT/B 4.003
Weakness classification (CWE)
References
- talos-cna@cisco.com (Exploit, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2020-6087?
- CVE-2020-6087 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-2020-6087?
- High severity. CVSS v3 base score is 7.5 out of 10.