CVE-2021-31882: Buffer Overflow
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 does not validate the length of the Domain Name Server IP option(s) (0x06) when processing DHCP ACK packets. This may lead to Denial-of-Service conditions. (FSMD-2021-0011)
Credit: productcert@siemens.com productcert@siemens.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Siemens Capital | ||
| Siemens Nucleus NET | ||
| Siemens Nucleus ReadyStart | <2017.02.1 | |
| Siemens Nucleus Source Code | ||
| 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 | ||
| All of | ||
| Siemens APOGEE MBC | ||
| Siemens APOGEE Modular Building Controller Firmware | ||
| All of | ||
| siemens APOGEE modular equiment controller | ||
| Siemens APOGEE Modular Equipment Controller | ||
| All of | ||
| Siemens APOGEE PXC Compact | ||
| Siemens APOGEE PXC Compact firmware | ||
| All of | ||
| Siemens APOGEE Modular Building Controller Firmware | ||
| Siemens APOGEE PXC Modular (P2 Ethernet) | ||
| All of | ||
| Siemens TALON TC | ||
| Siemens TALON TC | ||
| All of | ||
| 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-2021-31882?
CVE-2021-31882 is classified as a medium severity vulnerability affecting various Siemens devices.
How do I fix CVE-2021-31882?
To address CVE-2021-31882, update the affected Siemens products to the latest firmware version recommended by the vendor.
What software versions are affected by CVE-2021-31882?
CVE-2021-31882 affects multiple versions of Siemens APOGEE MBC, MEC, and PXC firmware, among others.
What type of attacks can exploit CVE-2021-31882?
CVE-2021-31882 may allow remote attackers to execute arbitrary code or cause a denial of service through specific network requests.
Is there a workaround for CVE-2021-31882?
While the best solution is to update firmware, network segmentation and access controls can help mitigate risk associated with CVE-2021-31882.
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