Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
None
Attack Vector
Network
0

CVE-2021-31884

Disclosure Date: November 09, 2021 •
CVE-2021-31884 CVSS v3 Base Score: 9.8
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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), 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 assumes that the data supplied with the “Hostname” DHCP option is NULL terminated. In cases when global hostname variable is not defined, this may lead to Out-of-bound reads, writes, and Denial-of-service conditions. (FSMD-2021-0014)

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CVSS V3 Severity and Metrics
Base Score:
9.8 Critical
Impact Score:
5.9
Exploitability Score:
3.9
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
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
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown

Additional Info

Authenticated
Unknown
Exploitable
Unknown
Reliability
Unknown
Stability
Unknown
Available Mitigations
Unknown
Shelf Life
Unknown
Userbase/Installbase
Unknown
Patch Effectiveness
Unknown
Technical Analysis