CVE-2021-31881
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). When processing a DHCP OFFER message, the DHCP client application does not validate the length of the Vendor option(s), leading to Denial-of-Service conditions. (FSMD-2021-0008)
Credit: productcert@siemens.com productcert@siemens.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Siemens Capital | ||
| Siemens Nucleus NET | ||
| Siemens Nucleus ReadyStart | <2012.08 | |
| Siemens Nucleus Source Code | ||
| All of | ||
| Siemens APOGEE Modular Building Controller Firmware | ||
| Siemens APOGEE MBC | ||
| All of | ||
| Siemens APOGEE Modular Equipment Controller | ||
| siemens APOGEE modular equiment controller | ||
| All of | ||
| Siemens APOGEE PXC Compact firmware | ||
| Siemens APOGEE PXC Compact | ||
| All of | ||
| Siemens APOGEE PXC Modular (P2 Ethernet) | ||
| Siemens APOGEE Modular Building Controller Firmware | ||
| All of | ||
| Siemens TALON TC | ||
| Siemens TALON TC | ||
| All of | ||
| Siemens TALON TC | ||
| Siemens TALON TC | ||
| Siemens APOGEE MBC | ||
| Siemens APOGEE Modular Building Controller Firmware | ||
| siemens APOGEE modular equiment controller | ||
| Siemens APOGEE Modular Equipment Controller | ||
| Siemens APOGEE PXC Compact | ||
| Siemens APOGEE PXC Compact firmware | ||
| Siemens APOGEE Modular Building Controller Firmware | ||
| Siemens APOGEE PXC Modular (P2 Ethernet) | ||
| Siemens TALON TC | ||
| Siemens TALON TC | ||
| Siemens TALON TC | ||
| Siemens TALON TC |
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Reference Links
- https://cert-portal.siemens.com/productcert/pdf/ssa-044112.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-114589.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-620288.pdf
- https://cert-portal.siemens.com/productcert/html/ssa-114589.html
- https://cert-portal.siemens.com/productcert/html/ssa-044112.html
- https://cert-portal.siemens.com/productcert/html/ssa-620288.html
Frequently Asked Questions
What is the severity of CVE-2021-31881?
CVE-2021-31881 has been classified with a medium to high severity rating due to its potential impact on affected systems.
How do I fix CVE-2021-31881?
To fix CVE-2021-31881, apply the relevant firmware updates provided by Siemens for the affected products.
Which products are affected by CVE-2021-31881?
CVE-2021-31881 affects various versions of Siemens APOGEE MBC, MEC, and PXC Compact, among others.
What are the risks associated with CVE-2021-31881?
The risks associated with CVE-2021-31881 include unauthorized access and potential manipulation of building control systems.
Where can I find more information about CVE-2021-31881?
For more information about CVE-2021-31881, refer to the vendor's certification and advisories related to the vulnerability.
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- vendor/siemens
- canonical/siemens capital
- canonical/siemens nucleus net
- canonical/siemens nucleus readystart
- canonical/siemens nucleus source code
- canonical/siemens apogee modular building controller firmware
- canonical/siemens apogee mbc
- canonical/siemens apogee modular equipment controller
- canonical/siemens apogee modular equiment controller
- canonical/siemens apogee pxc compact firmware
- canonical/siemens apogee pxc compact
- canonical/siemens apogee pxc modular (p2 ethernet)
- canonical/siemens talon tc