PT-2020-18915 · Rockwell Automation · Allen-Bradley Flex Io 1794-Aent/B

Published 2020-10-14 · Updated 2022-07-29 · CVE-2020-6087

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Allen-Bradley Flex IO 1794-AENT/B (affected versions not specified)

Description A denial of service issue exists in the ENIP Request Path Data Segment functionality. 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 issue. 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.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

CVE-2020-6087

Affected Products

Allen-Bradley Flex Io 1794-Aent/B

References · 4

• 🔥 https://talosintelligence.com/vulnerability_reports/TALOS-2020-1007 · Exploit
• https://osv.dev/vulnerability/CVE-2020-6087 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-6087 · Security Note
• https://t.me/cibsecurity/15257 · Telegram Post