Siemens SIMATIC Products CVE-2019-10929 Man in the Middle Security Bypass Vulnerability

Description

Multiple Siemens SIMATIC Products are is prone to a security-bypass vulnerability. Attackers can exploit this issue to bypass certain security restrictions to perform unauthorized actions. This may aid in further attacks. The following Siemens products are affected: Siemens SIMATIC CP 1626 Siemens SIMATIC HMI Panel Siemens SIMATIC NET PC Software Siemens SIMATIC STEP 7 (TIA Portal) prior to v16 Siemens SIMATIC WinCC (TIA Portal) prior to v16 Siemens SIMATIC WinCC OA: prior to v3.16 Patch 12 Siemens SIMATIC WinCC Runtime Advanced Siemens SIMATIC WinCC Runtime Professional Siemens TIM 1531 IRC

Technologies Affected

• Siemens SIMATIC CP 1626
• Siemens SIMATIC HMI Panels
• Siemens SIMATIC NET PC Software
• Siemens SIMATIC STEP 7 (TIA Portal) V11
• Siemens SIMATIC STEP 7 (TIA Portal) v10
• Siemens SIMATIC STEP 7 (TIA Portal) v15
• Siemens SIMATIC WinCC (TIA Portal) V11
• Siemens SIMATIC WinCC (TIA Portal) V12
• Siemens SIMATIC WinCC (TIA Portal) V13
• Siemens SIMATIC WinCC (TIA Portal) V14
• Siemens SIMATIC WinCC (TIA Portal) v10
• Siemens SIMATIC WinCC (TIA Portal) v15
• Siemens SIMATIC WinCC OA 3.12
• Siemens SIMATIC WinCC OA 3.14
• Siemens SIMATIC WinCC OA 3.15
• Siemens SIMATIC WinCC OA 3.16
• Siemens SIMATIC WinCC Runtime Professional
• Siemens SIMATIC Wincc Runtime Advanced
• Siemens TIM 1531 IRC

Recommendations

Block external access at the network boundary, unless external parties require service.
If global access isn’t needed, filter access to the affected computer at the network boundary. Restricting access to only trusted computers and networks might greatly reduce the likelihood of successful exploits.

Implement multiple redundant layers of security.
Use of multiple redundant layers of encryption may reduce exposure to this and other latent vulnerabilities.

Updates are available. Please see the references or vendor advisory for more information.