Input validation error in FactoryTalk Services Platform - CVE-2020-5807
Published: December 28, 2020 / Updated: January 29, 2021
Vulnerability identifier: #VU49159
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green
CVE-ID: CVE-2020-5807
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vendor: Rockwell Automation
Affected software:
FactoryTalk Services Platform
FactoryTalk Services Platform
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input. An unauthenticated remote attacker can send data to RsvcHost.exe listening on TCP port 5241 to add entries in the FactoryTalk Diagnostics event log. A local user can use the FactoryTalk Diagnostics Viewer (FTDiagViewer.exe) to view the log. The attacker can specify long fields in the log entry, which can cause an unhandled exception by wcscpy_s() in FTDiagnosticsViewer.dll loaded in FTDiagViewer.exe, resulting in process termination.
How to mitigate CVE-2020-5807
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.