CVE-2021-31888
Siemens · published 2021-11-09
Source record Collected from the National Vulnerability Database (NVD)
Description
Description by Siemens AG via the CVE Program.
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), 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). FTP server does not properly validate the length of the “MKD/XMKD” command, leading to stack-based buffer overflows. This may result in Denial-of-Service conditions and Remote Code Execution. (FSMD-2021-0018)
Status at the source
- NVD status: Modified
Affected products, as the source lists them
| Vendor | Product | Versions |
|---|---|---|
| Siemens | APOGEE MBC (PPC) (BACnet) | All versions: affected |
| Siemens | APOGEE MBC (PPC) (P2 Ethernet) | All versions: affected |
| Siemens | APOGEE MEC (PPC) (BACnet) | All versions: affected |
| Siemens | APOGEE MEC (PPC) (P2 Ethernet) | All versions: affected |
| Siemens | APOGEE PXC Compact (BACnet) | All versions < V3.5.4: affected |
| Siemens | APOGEE PXC Compact (P2 Ethernet) | All versions < V2.8.19: affected |
| Siemens | APOGEE PXC Modular (BACnet) | All versions < V3.5.4: affected |
| Siemens | APOGEE PXC Modular (P2 Ethernet) | All versions < V2.8.19: affected |
| Siemens | Desigo PXC00-E.D | All versions >= V2.3 and < V6.30.016: affected |
| Siemens | Desigo PXC00-U | All versions >= V2.3 and < V6.30.016: affected |
| Siemens | Desigo PXC001-E.D | All versions >= V2.3 and < V6.30.016: affected |
| Siemens | Desigo PXC100-E.D | All versions >= V2.3 and < V6.30.016: affected |
| Siemens | Desigo PXC12-E.D | All versions >= V2.3 and < V6.30.016: affected |
| Siemens | Desigo PXC128-U | All versions >= V2.3 and < V6.30.016: affected |
| Siemens | Desigo PXC200-E.D | All versions >= V2.3 and < V6.30.016: affected |
| Siemens | Desigo PXC22-E.D | All versions >= V2.3 and < V6.30.016: affected |
| Siemens | Desigo PXC22.1-E.D | All versions >= V2.3 and < V6.30.016: affected |
| Siemens | Desigo PXC36.1-E.D | All versions >= V2.3 and < V6.30.016: affected |
| Siemens | Desigo PXC50-E.D | All versions >= V2.3 and < V6.30.016: affected |
| Siemens | Desigo PXC64-U | All versions >= V2.3 and < V6.30.016: affected |
| Siemens | Desigo PXM20-E | All versions >= V2.3 and < V6.30.016: affected |
| Siemens | Nucleus NET | All versions: affected |
| Siemens | Nucleus ReadyStart V3 | All versions < V2017.02.4: affected |
| Siemens | Nucleus Source Code | All versions: affected |
| Siemens | TALON TC Compact (BACnet) | All versions < V3.5.4: affected |
| Siemens | TALON TC Modular (BACnet) | All versions < V3.5.4: affected |
Products named in NVD's CPE match criteria (22)
cpe:2.3:a:siemens:nucleus_net:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:nucleus_readystart_v3:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:nucleus_source_code:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:apogee_modular_building_controller_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:apogee_modular_equiment_controller_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:apogee_pxc_compact_firmware:*:*:*:*:p2_ethernet:*:*:*cpe:2.3:o:siemens:apogee_pxc_modular_firmware:*:*:*:*:p2_ethernet:*:*:*cpe:2.3:o:siemens:talon_tc_compact_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:talon_tc_modular_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:desigo_pxc00-e.d_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:desigo_pxc00-u_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:desigo_pxc001-e.d_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:desigo_pxc12-e.d_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:desigo_pxc22-e.d_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:desigo_pxc22.1-e.d_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:desigo_pxc36.1-e.d_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:desigo_pxc50-e.d_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:desigo_pxc64-u_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:desigo_pxc100-e.d_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:desigo_pxc128-u_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:desigo_pxc200-e.d_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:desigo_pxm20-e_firmware:*:*:*:*:*:*:*:*
DeSpy has not checked any unit, hardware revision or firmware. A product missing here is not a statement that it is unaffected.
Scores, as their sources published them
- CVSS 3.1: 8.8 HIGH — as published by NIST (Primary)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0: 6.5 MEDIUM — as published by NIST (Primary)
AV:N/AC:L/Au:S/C:P/I:P/A:P
DeSpy does not score records. These are the sources' own values.
Weaknesses
Sources
References the source lists
- 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-044112.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-114589.pdf
Source dates: published 2021-11-09, last changed 2026-06-17. DeSpy's copy of this version is dated 2026-09-28.
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