Vulnerability · Published Oct 14, 2020 · Assigned by talos

CVE-2020-6087

High 7.5

In plain English

A high-severity buffer overflow in Allen Bradley. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 4.3% (higher than 91% of all known vulnerabilities).

Severity (CVSS 3.0)7.5High

Exploit odds (30 days)4.3%top 8.9% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

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 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.

Affected products (as reported)

Vendor	Product	Versions
n/a	Allen Bradley	Allen-Bradley Flex IO 1794-AENT/B 4.003

Weakness: CWE-120 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

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