Rockwellautomation Flex Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

high Tenable.ot Plugin ID 500437
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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.

Solution

Refer to vendor advisory for Security Updates

See Also

https://talosintelligence.com/vulnerability_reports/TALOS-2020-1007

Plugin Details

Severity: High

ID: 500437

Version: 1.0

Type: local

Family: SCADA

Published: 8/10/2021

Updated: 8/10/2021

Risk Information

CVSS Score Source: CVE-2020-6086

CVSS v2

Risk Factor: High

Base Score: 7.8

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS v3

Risk Factor: High

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vulnerability Information

CPE: cpe:2.3:o:rockwellautomation:flex_i\/o_1794-aent\/b_firmware:4.003:*:*:*:*:*:*:*

Patch Publication Date: 10/14/2020

Vulnerability Publication Date: 10/14/2020

Reference Information

CVE: CVE-2020-6086