critical
9.8
CWE
170
Advisory Published
Updated

CVE-2021-31884

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 Source Code (All versions), TALON TC Compact (BACnet) (All versions < V3.5.4), TALON TC Modular (BACnet) (All versions < V3.5.4). The DHCP client application assumes that the data supplied with the “Hostname” DHCP option is NULL terminated. In cases when global hostname variable is not defined, this may lead to Out-of-bound reads, writes, and Denial-of-service conditions. (FSMD-2021-0014)

Credit: productcert@siemens.com

Affected SoftwareAffected VersionHow to fix
Siemens Capital Vstar
Siemens Nucleus NET
Siemens Nucleus ReadyStart v3<2017.02.1
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<2.8.19
Siemens Apogee Pxc Compact
Siemens Apogee Pxc Modular Firmware<2.8.19
Siemens Apogee Pxc Modular
Siemens Talon Tc Compact Firmware<3.5.4
Siemens Talon Tc Compact
Siemens Talon Tc Modular Firmware<3.5.4
Siemens Talon Tc Modular
Siemens Desigo Pxc00-e.d Firmware>=2.3<6.30.016
Siemens Desigo Pxc00-e.d
Siemens Desigo Pxc00-u Firmware>=2.3<6.30.016
Siemens Desigo Pxc00-u
Siemens Desigo Pxc001-e.d Firmware>=2.3<6.30.016
Siemens Desigo Pxc001-e.d
Siemens Desigo Pxc12-e.d Firmware>=2.3<6.30.016
Siemens Desigo Pxc12-e.d
Siemens Desigo Pxc22-e.d Firmware>=2.3<6.30.016
Siemens Desigo Pxc22-e.d
Siemens Desigo Pxc22.1-e.d Firmware>=2.3<6.30.016
Siemens Desigo Pxc22.1-e.d
Siemens Desigo Pxc36.1-e.d Firmware>=2.3<6.30.016
Siemens Desigo Pxc36.1-e.d
Siemens Desigo Pxc50-e.d Firmware>=2.3<6.30.016
Siemens Desigo Pxc50-e.d
Siemens Desigo Pxc64-u Firmware>=2.3<6.30.016
Siemens Desigo Pxc64-u
Siemens Desigo Pxc100-e.d Firmware>=2.3<6.30.016
Siemens Desigo Pxc100-e.d
Siemens Desigo Pxc128-u Firmware>=2.3<6.30.016
Siemens Desigo Pxc128-u
Siemens Desigo Pxc200-e.d Firmware>=2.3<6.30.016
Siemens Desigo Pxc200-e.d
Siemens Desigo Pxm20-e Firmware>=2.3<6.30.016
Siemens Desigo Pxm20-e
Siemens Apogee Pxc Compact Firmware<3.5.4
Siemens Apogee Pxc Modular Firmware<3.5.4

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2021-31884?

    The severity of CVE-2021-31884 is critical, with a severity value of 9.8.

  • Which products are affected by CVE-2021-31884?

    CVE-2021-31884 affects the following products: Siemens Capital Vstar, Siemens Nucleus Net, Siemens Nucleus Readystart V3, Siemens Nucleus Source Code, Siemens Apogee Modular Building Controller Firmware, Siemens Apogee Pxc Compact Firmware, Siemens Apogee Pxc Modular Firmware, Siemens Talon Tc Compact Firmware, Siemens Talon Tc Modular Firmware, Siemens Desigo Pxc00-e.d Firmware, Siemens Desigo Pxc00-u Firmware, Siemens Desigo Pxc001-e.d Firmware, Siemens Desigo Pxc12-e.d Firmware, Siemens Desigo Pxc22-e.d Firmware, Siemens Desigo Pxc22.1-e.d Firmware, Siemens Desigo Pxc36.1-e.d Firmware, Siemens Desigo Pxc50-e.d Firmware, Siemens Desigo Pxc64-u Firmware, Siemens Desigo Pxc100-e.d Firmware, Siemens Desigo Pxc128-u Firmware, Siemens Desigo Pxc200-e.d Firmware, and Siemens Desigo Pxm20-e Firmware.

  • How can I fix CVE-2021-31884?

    To fix CVE-2021-31884, it is recommended to apply the necessary security patches provided by Siemens.

  • Where can I find more information about CVE-2021-31884?

    You can find more information about CVE-2021-31884 on the Siemens ProductCERT website. Here are some references: [SSA-044112](https://cert-portal.siemens.com/productcert/pdf/ssa-044112.pdf), [SSA-114589](https://cert-portal.siemens.com/productcert/pdf/ssa-114589.pdf), [SSA-620288](https://cert-portal.siemens.com/productcert/pdf/ssa-620288.pdf).

  • What is the Common Weakness Enumeration (CWE) for CVE-2021-31884?

    The Common Weakness Enumeration (CWE) for CVE-2021-31884 is CWE-170.

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