CVE-2021-31885

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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 ReadyStart V4 (All versions < V4.1.1), Nucleus Source Code (All versions), PLUSCONTROL 1st Gen (All versions), TALON TC Compact (BACnet) (All versions < V3.5.4), TALON TC Modular (BACnet) (All versions < V3.5.4). TFTP server application allows for reading the contents of the TFTP memory buffer via sending malformed TFTP commands. (FSMD-2021-0009)

Se ha identificado una vulnerabilidad en APOGEE MBC (PPC) (BACnet) (Todas las versiones), APOGEE MBC (PPC) (P2 Ethernet) (Todas las versiones), APOGEE MEC (PPC) (BACnet) (Todas las versiones), APOGEE MEC (PPC) (P2 Ethernet) (Todas las versiones), APOGEE PXC Compact (BACnet) (Todas las versiones anteriores a V3. 5.4), APOGEE PXC Compact (P2 Ethernet) (Todas las versiones anteriores a V2.8.19), APOGEE PXC Modular (BACnet) (Todas las versiones anteriores a V3. 5.4), APOGEE PXC Modular (P2 Ethernet) (Todas las versiones anteriores a V2.8.19), Desigo PXC00-E.D (Todas las versiones posteriores o iguales V2.3 y anteriores a V6.30.016), Desigo PXC00-U (Todas las versiones posteriores o iguales V2.3 y anteriores a V6.30. 016), Desigo PXC001-E.D (Todas las versiones posteriores o iguales V2.3 y anteriores a V6.30.016), Desigo PXC100-E.D (Todas las versiones posteriores o iguales V2.3 y anteriores a V6.30.016), Desigo PXC12-E.D (Todas las versiones posteriores o iguales V2.3 y anteriores a V6.30. 016), Desigo PXC128-U (Todas las versiones posteriores o iguales V2.3 y anteriores a V6.30.016), Desigo PXC200-E.D (Todas las versiones posteriores o iguales V2.3 y anteriores a V6.30.016), Desigo PXC22-E.D (Todas las versiones posteriores o iguales V2.3 y anteriores a V6.30.016), Desigo PXC22.1-E. D (Todas las versiones posteriores o iguales V2.3 y anteriores a V6.30.016), Desigo PXC36.1-E.D (Todas las versiones posteriores o iguales V2.3 y anteriores a V6.30.016), Desigo PXC50-E.D (Todas las versiones posteriores o iguales V2.3 y anteriores a V6.30.016), Desigo PXC64-U (Todas las versiones posteriores o iguales V2. 3 y anteriores a V6.30.016), Desigo PXM20-E (Todas las versiones posteriores o iguales V2.3 y anteriores a V6.30.016), Nucleus NET (Todas las versiones), Nucleus ReadyStart V3 (Todas las versiones anteriores a V2017.02.4), Nucleus ReadyStart V4 (Todas las versiones anteriores a V4. 1.1), Nucleus Source Code (Todas las versiones), PLUSCONTROL 1st Gen (Todas las versiones), TALON TC Compact (BACnet) (Todas las versiones anteriores a V3.5.4), TALON TC Modular (BACnet) (Todas las versiones anteriores a V3.5.4). La aplicación del servidor TFTP permite leer el contenido del buffer de memoria TFTP mediante el envío de comandos TFTP malformados. (FSMD-2021-0009)

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-04-29 CVE Reserved
2021-11-09 CVE Published
2024-07-25 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-805: Buffer Access with Incorrect Length Value

CAPEC

References (3)

URL	Tag	Source
https://cert-portal.siemens.com/productcert/pdf/ssa-845392.pdf	X_refsource_misc

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://cert-portal.siemens.com/productcert/pdf/ssa-044112.pdf	2022-05-20
https://cert-portal.siemens.com/productcert/pdf/ssa-114589.pdf	2022-05-20

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Siemens Search vendor "Siemens"	Apogee Modular Building Controller Firmware Search vendor "Siemens" for product "Apogee Modular Building Controller Firmware"	*	-	Affected	in	Siemens Search vendor "Siemens"	Apogee Modular Building Controller Search vendor "Siemens" for product "Apogee Modular Building Controller"	-	-	Safe
Siemens Search vendor "Siemens"	Apogee Modular Equiment Controller Firmware Search vendor "Siemens" for product "Apogee Modular Equiment Controller Firmware"	*	-	Affected	in	Siemens Search vendor "Siemens"	Apogee Modular Equiment Controller Search vendor "Siemens" for product "Apogee Modular Equiment Controller"	-	-	Safe
Siemens Search vendor "Siemens"	Apogee Pxc Compact Firmware Search vendor "Siemens" for product "Apogee Pxc Compact Firmware"	*	-	Affected	in	Siemens Search vendor "Siemens"	Apogee Pxc Compact Search vendor "Siemens" for product "Apogee Pxc Compact"	-	-	Safe
Siemens Search vendor "Siemens"	Apogee Pxc Modular Firmware Search vendor "Siemens" for product "Apogee Pxc Modular Firmware"	*	-	Affected	in	Siemens Search vendor "Siemens"	Apogee Pxc Modular Search vendor "Siemens" for product "Apogee Pxc Modular"	-	-	Safe
Siemens Search vendor "Siemens"	Talon Tc Compact Firmware Search vendor "Siemens" for product "Talon Tc Compact Firmware"	*	-	Affected	in	Siemens Search vendor "Siemens"	Talon Tc Compact Search vendor "Siemens" for product "Talon Tc Compact"	-	-	Safe
Siemens Search vendor "Siemens"	Talon Tc Modular Firmware Search vendor "Siemens" for product "Talon Tc Modular Firmware"	*	-	Affected	in	Siemens Search vendor "Siemens"	Talon Tc Modular Search vendor "Siemens" for product "Talon Tc Modular"	-	-	Safe
Siemens Search vendor "Siemens"		Capital Vstar Search vendor "Siemens" for product "Capital Vstar"				*		-		Affected
Siemens Search vendor "Siemens"		Nucleus Net Search vendor "Siemens" for product "Nucleus Net"				*		-		Affected
Siemens Search vendor "Siemens"		Nucleus Readystart V3 Search vendor "Siemens" for product "Nucleus Readystart V3"				< 2017.02.4 Search vendor "Siemens" for product "Nucleus Readystart V3" and version " < 2017.02.4"		-		Affected
Siemens Search vendor "Siemens"		Nucleus Readystart V4 Search vendor "Siemens" for product "Nucleus Readystart V4"				< 4.1.1 Search vendor "Siemens" for product "Nucleus Readystart V4" and version " < 4.1.1"		-		Affected
Siemens Search vendor "Siemens"		Nucleus Source Code Search vendor "Siemens" for product "Nucleus Source Code"				*		-		Affected