critical
9.1
CWE
240
Advisory Published
Updated

CVE-2021-31890

First published: Tue Nov 09 2021(Updated: )

A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet) (All versions), APOGEE MEC (PPC) (BACnet) (All versions), APOGEE MEC (PPC) (P2 Ethernet) (All versions), APOGEE PXC Compact (BACnet) (All versions < V3.5.4), APOGEE PXC Compact (P2 Ethernet) (All versions < V2.8.19), APOGEE PXC Modular (BACnet) (All versions < V3.5.4), APOGEE PXC Modular (P2 Ethernet) (All versions < V2.8.19), Capital VSTAR (All versions with enabled Ethernet options), Desigo PXC00-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC00-U (All versions >= V2.3 and < V6.30.016), Desigo PXC001-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC100-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC12-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC128-U (All versions >= V2.3 and < V6.30.016), Desigo PXC200-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC22-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC22.1-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC36.1-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC50-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC64-U (All versions >= V2.3 and < V6.30.016), Desigo PXM20-E (All versions >= V2.3 and < V6.30.016), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2017.02.4), Nucleus ReadyStart V4 (All versions < V4.1.1), Nucleus Source Code (All versions), PLUSCONTROL 1st Gen (All versions), SIMOTICS CONNECT 400 (All versions < V0.5.0.0), TALON TC Compact (BACnet) (All versions < V3.5.4), TALON TC Modular (BACnet) (All versions < V3.5.4). The total length of an TCP payload (set in the IP header) is unchecked. This may lead to various side effects, including Information Leak and Denial-of-Service conditions, depending on the network buffer organization in memory. (FSMD-2021-0017)

Credit: productcert@siemens.com productcert@siemens.com

Affected SoftwareAffected VersionHow to fix
Google Android
Siemens Capital Vstar
Siemens Nucleus NET
Siemens Nucleus ReadyStart v3<2017.02.4
Siemens Nucleus ReadyStart v4<4.1.1
Siemens Nucleus Source Code
Siemens Apogee Modular Building Controller Firmware
Siemens Apogee Modular Building Controller
Siemens Apogee Modular Equiment Controller Firmware
Siemens Apogee Modular Equiment Controller
Siemens Apogee Pxc Compact Firmware
Siemens Apogee Pxc Compact
Siemens Apogee Pxc Modular Firmware
Siemens Apogee Pxc Modular
Siemens Talon Tc Compact Firmware
Siemens Talon Tc Compact
Siemens Talon Tc Modular Firmware
Siemens Talon Tc Modular
All of
Siemens Apogee Modular Building Controller Firmware
Siemens Apogee Modular Building Controller
All of
Siemens Apogee Modular Equiment Controller Firmware
Siemens Apogee Modular Equiment Controller
All of
Siemens Apogee Pxc Compact Firmware
Siemens Apogee Pxc Compact
All of
Siemens Apogee Pxc Modular Firmware
Siemens Apogee Pxc Modular
All of
Siemens Talon Tc Compact Firmware
Siemens Talon Tc Compact
All of
Siemens Talon Tc Modular Firmware
Siemens Talon Tc Modular

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Reference Links

Frequently Asked Questions

  • What is CVE-2021-31890?

    CVE-2021-31890 is a vulnerability identified in APOGEE MBC (PPC) (BACnet) and other Siemens software versions.

  • Which software versions are affected by CVE-2021-31890?

    All versions of APOGEE MBC (PPC) (BACnet), APOGEE MBC (PPC) (P2 Ethernet), APOGEE MEC (PPC) (BACnet), APOGEE MEC (PPC) (P2 Ethernet), and APOGEE PXC Compact (BACnet) are affected, with APOGEE PXC Compact versions prior to V3.5.4 being vulnerable.

  • How severe is CVE-2021-31890?

    CVE-2021-31890 has a severity rating of 9.1 (critical).

  • Where can I find more information about CVE-2021-31890?

    You can find more information about CVE-2021-31890 in the Siemens ProductCERT advisories SSA-044112, SSA-114589, and SSA-223353.

  • What is the Common Weakness Enumeration (CWE) associated with CVE-2021-31890?

    CVE-2021-31890 is associated with CWE-240.

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