PT-2020-5533 · Rockwell Automation · Factorytalk Linx

Published 2020-12-29 · Updated 2022-07-12 · CVE-2020-5802

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 FactoryTalk Linx versions prior to the fixed version

Description The issue is related to insufficient exception handling in the FactoryTalk Linx system, allowing a remote attacker to terminate RSLinxNG.exe by sending a specially crafted ConfigureItems message to TCP port 4241. This can be achieved by passing an attacker-controlled memory allocation size to the C++ new operator in RnaDaSvr.dll, resulting in an unhandled exception. The vulnerability was observed in FactoryTalk 6.11.

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

Improper Handling of Exceptional Conditions

Allocation of Resources Without Limits

Weakness Enumeration

CWE-755

CWE-770

Related Identifiers

BDU:2021-01057

CVE-2020-5802

Affected Products

Factorytalk Linx

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2020-5802 · Security Note
• https://bdu.fstec.ru/vul/2021-01057 · Security Note
• https://osv.dev/vulnerability/CVE-2020-5802 · Vendor Advisory
• https://t.me/cvenotify/7906 · Telegram Post
• https://tenable.com/security/research/tra-2020-71 · Note
• https://t.me/cibsecurity/21385 · Telegram Post
• https://t.me/cvenotify/7884 · Telegram Post
• https://us-cert.gov/ics/advisories/icsa-21-028-01 · Note