The random-number generator on Siemens SIMATIC S7-1500 CPU PLC devices with firmware before 1.5.0 does not have sufficient entropy, which makes it easier for remote attackers to defeat cryptographic protection mechanisms and hijack sessions via unspecified vectors.

The random-number generator on Siemens SIMATIC S7-1500 CPU PLC devices with firmware before 1.5.0 does not have sufficient entropy, which makes it easier for remote attackers to defeat cryptographic protection mechanisms and hijack sessions via unspecified vectors.  

This plugin only works with Tenable.ot. Please visit https://www.tenable.com/products/tenable-ot for more information.

Siemens SIMATIC S7-1500 PLCs < 1.5 are affected by multiple vulnerabilities.
 A cross-site scripting (XSS) vulnerability in the integrated web server on Siemens SIMATIC S7-1500 CPU PLC devices with firmware before 1.5.0 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
 A vulnerability exists that allows remote attackers to cause a denial of service (defect-mode transition) via crafted Profinet packets.
 - The integrated web server on Siemens SIMATIC S7-1500 CPU PLC devices with firmware before 1.5.0 allows remote attackers to inject headers via unspecified vectors.
 - Open redirect vulnerability in the integrated web server on Siemens SIMATIC S7-1500 CPU PLC devices with firmware before 1.5.0 allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via unspecified vectors.
 - The random-number generator on Siemens SIMATIC S7-1500 CPU PLC devices with firmware before 1.5.0 does not have sufficient entropy, which makes it easier for remote attackers to defeat cryptographic protection mechanisms and hijack sessions via unspecified vectors.
 - SIMATIC S7-1500 CPU PLC devices with firmware before 1.5.0 allow remote attackers to cause a denial of service (defect-mode transition) via crafted HTTP packets.
 - SIMATIC S7-1500 CPU PLC devices with firmware before 1.5.0 allow remote attackers to cause a denial of service (defect-mode transition) via crafted ISO-TSAP packets.
 - SIMATIC S7-1500 CPU PLC devices with firmware before 1.5.0 allow remote attackers to cause a denial of service (defect-mode transition) via crafted HTTPS packets.    

ID	Name	Product	Family	Severity
500041	Siemens SIMATIC S7-1500 Insufficient Entropy (CVE-2014-2251)	Tenable OT Security	Tenable.ot	high
720194	Siemens SIMATIC S7-1500 PLCs < 1.5 Random Number Generator Insufficient Entropy	Nessus Network Monitor	SCADA	high
720189	Siemens SIMATIC S7-1500 PLCs < 1.5 Multiple Vulnerabilities	Nessus Network Monitor	SCADA	high

Detections

Analytics

CVE-2014-2251

high

Tenable Plugins

high

high

high