Siemens APOGEE MBC (PPC) (BACnet)

CVE-2021-31887

HIGH 8.8

At a glance

Source: NVD
EPSS: EPSS 2.45 % · percentile 84 (2026-10-30)
State: PUBLISHED
Published: 2021-11-09 11:32 UTC
Updated: 2024-08-03 23:10 UTC
Assigner: siemens
NVD status: Modified

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Description

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 “PWD/XPWD” command, leading to stack-based buffer overflows. This may result in Denial-of-Service conditions and Remote Code Execution. (FSMD-2021-0016)

Weaknesses (CWE)

CWE-170 — Improper Null Termination
CWE-787 — Out-of-bounds Write

References

Scores

Version	Score	Vector	Scored by
CVSS 3.1	HIGH 8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	NVD · nvd@nist.gov (Primary)
CVSS 2.0	MEDIUM 6.5	AV:N/AC:L/Au:S/C:P/I:P/A:P	NVD · nvd@nist.gov (Primary)

European references

ENISA EUVD · EUVD-2021-18762
GCVE · GCVE-0-2021-31887

CERT-FR advisories

CERTFR-2021-AVI-949 — Multiples vulnérabilités dans les produits Siemens · cert.ssi.gouv.fr
CERTFR-2021-AVI-854 — Multiples vulnérabilités dans les produits Siemens · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:a:siemens:nucleus_net:*:*:*:*:*:*:*:*
cpe:2.3:a:siemens:nucleus_readystart_v3:*:*:*:*:*:*:*:* < 2017.02.4
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:*:*:* < 2.8.19
cpe:2.3:o:siemens:apogee_pxc_compact_firmware:*:*:*:*:bacnet:*:*:* < 3.5.4
cpe:2.3:o:siemens:apogee_pxc_modular_firmware:*:*:*:*:p2_ethernet:*:*:* < 2.8.19
cpe:2.3:o:siemens:apogee_pxc_modular_firmware:*:*:*:*:bacnet:*:*:* < 3.5.4
cpe:2.3:o:siemens:talon_tc_compact_firmware:*:*:*:*:*:*:*:* < 3.5.4
cpe:2.3:o:siemens:talon_tc_modular_firmware:*:*:*:*:*:*:*:* < 3.5.4
cpe:2.3:o:siemens:desigo_pxc00-e.d_firmware:*:*:*:*:*:*:*:* ≥ 2.3 < 6.30.016
cpe:2.3:o:siemens:desigo_pxc00-u_firmware:*:*:*:*:*:*:*:* ≥ 2.3 < 6.30.016
cpe:2.3:o:siemens:desigo_pxc001-e.d_firmware:*:*:*:*:*:*:*:* ≥ 2.3 < 6.30.016
cpe:2.3:o:siemens:desigo_pxc12-e.d_firmware:*:*:*:*:*:*:*:* ≥ 2.3 < 6.30.016
cpe:2.3:o:siemens:desigo_pxc22-e.d_firmware:*:*:*:*:*:*:*:* ≥ 2.3 < 6.30.016
cpe:2.3:o:siemens:desigo_pxc22.1-e.d_firmware:*:*:*:*:*:*:*:* ≥ 2.3 < 6.30.016
cpe:2.3:o:siemens:desigo_pxc36.1-e.d_firmware:*:*:*:*:*:*:*:* ≥ 2.3 < 6.30.016
cpe:2.3:o:siemens:desigo_pxc50-e.d_firmware:*:*:*:*:*:*:*:* ≥ 2.3 < 6.30.016
cpe:2.3:o:siemens:desigo_pxc64-u_firmware:*:*:*:*:*:*:*:* ≥ 2.3 < 6.30.016
cpe:2.3:o:siemens:desigo_pxc100-e.d_firmware:*:*:*:*:*:*:*:* ≥ 2.3 < 6.30.016
cpe:2.3:o:siemens:desigo_pxc128-u_firmware:*:*:*:*:*:*:*:* ≥ 2.3 < 6.30.016
cpe:2.3:o:siemens:desigo_pxc200-e.d_firmware:*:*:*:*:*:*:*:* ≥ 2.3 < 6.30.016
cpe:2.3:o:siemens:desigo_pxm20-e_firmware:*:*:*:*:*:*:*:* ≥ 2.3 < 6.30.016

Affected products

Product	Versions
Siemens · APOGEE MBC (PPC) (BACnet)	affected All versions
Siemens · APOGEE MBC (PPC) (P2 Ethernet)	affected All versions
Siemens · APOGEE MEC (PPC) (BACnet)	affected All versions
Siemens · APOGEE MEC (PPC) (P2 Ethernet)	affected All versions
Siemens · APOGEE PXC Compact (BACnet)	affected All versions < V3.5.4
Siemens · APOGEE PXC Compact (P2 Ethernet)	affected All versions < V2.8.19
Siemens · APOGEE PXC Modular (BACnet)	affected All versions < V3.5.4
Siemens · APOGEE PXC Modular (P2 Ethernet)	affected All versions < V2.8.19
Siemens · Desigo PXC00-E.D	affected All versions >= V2.3 and < V6.30.016
Siemens · Desigo PXC00-U	affected All versions >= V2.3 and < V6.30.016
Siemens · Desigo PXC001-E.D	affected All versions >= V2.3 and < V6.30.016
Siemens · Desigo PXC100-E.D	affected All versions >= V2.3 and < V6.30.016
Siemens · Desigo PXC12-E.D	affected All versions >= V2.3 and < V6.30.016
Siemens · Desigo PXC128-U	affected All versions >= V2.3 and < V6.30.016
Siemens · Desigo PXC200-E.D	affected All versions >= V2.3 and < V6.30.016
Siemens · Desigo PXC22-E.D	affected All versions >= V2.3 and < V6.30.016
Siemens · Desigo PXC22.1-E.D	affected All versions >= V2.3 and < V6.30.016
Siemens · Desigo PXC36.1-E.D	affected All versions >= V2.3 and < V6.30.016
Siemens · Desigo PXC50-E.D	affected All versions >= V2.3 and < V6.30.016
Siemens · Desigo PXC64-U	affected All versions >= V2.3 and < V6.30.016

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD

⚠️ Siemens APOGEE MBC (PPC) (BACnet)