A vulnerability has been found in Siemens SIMATIC HMI Comfort Panel, SIMATIC HMI Comfort Outdoor Panel, SIMATIC HMI KTP Mobile Panel and SIMATIC WinCC (SCADA Software) (unknown version) and classified as problematic. Affected by this vulnerability is an unknown code block of the component TLS Session Key Handler. The manipulation with an unknown input leads to a cryptographic issues vulnerability. The CWE definition for the vulnerability is CWE-310. As an impact it is known to affect confidentiality. The summary by CVE is:

A vulnerability has been identified in SIMATIC HMI Comfort Panels 4" - 22" (All versions < V15.1 Update 1), SIMATIC HMI Comfort Outdoor Panels 7" & 15" (All versions < V15.1 Update 1), SIMATIC HMI KTP Mobile Panels KTP400F, KTP700, KTP700F, KTP900 und KTP900F (All versions < V15.1 Update 1), SIMATIC WinCC Runtime Advanced (All versions < V15.1 Update 1), SIMATIC WinCC Runtime Professional (All versions < V15.1 Update 1), SIMATIC WinCC (TIA Portal) (All versions < V15.1 Update 1), SIMATIC HMI Classic Devices (TP/MP/OP/MP Mobile Panel) (All versions). An attacker with network access to affected devices could potentially obtain a TLS session key. If the attacker is able to observe TLS traffic between a legitimate user and the device, then the attacker could decrypt the TLS traffic. The security vulnerability could be exploited by an attacker who has network access to the web interface of the device and who is able to observe TLS traffic between legitimate users and the web interface of the affected device. The vulnerability could impact the confidentiality of the communication between the affected device and a legitimate user. At the time of advisory publication no public exploitation of the security vulnerability was known.

The bug was discovered 05/14/2019. The weakness was shared 05/14/2019 (Website). The advisory is shared at securityfocus.com. This vulnerability is known as CVE-2019-6576 since 01/22/2019. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 09/19/2023). MITRE ATT&CK project uses the attack technique T1600 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The entries 135047 and 135050 are related to this item.

Productinfo

Type

• SCADA Software

Vendor

• Siemens

Name

• SIMATIC HMI Comfort Outdoor Panel
• SIMATIC HMI Comfort Panel
• SIMATIC HMI KTP Mobile Panel
• SIMATIC WinCC

License

• commercial

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

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