Input validation error in Siemens products - CVE-2021-31345

Vulnerability identifier: #VU58079

CSH Severity: High

CVSS v4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-31345

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the total length of an UDP payload (set in the IP header) is unchecked. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack or gain access to sensitive information on the system.

Nucleus NET
Nucleus Source Code
Capital VSTAR
Nucleus ReadyStart
APOGEE MBC (PPC) (P2 Ethernet)
TALON TC Modular (BACnet)
TALON TC Compact (BACnet)
APOGEE PXC Modular (P2 Ethernet)
APOGEE PXC Compact (P2 Ethernet)
APOGEE MBC (PPC) (BACnet)
APOGEE MEC (PPC) (BACnet)
APOGEE PXC Compact (BACnet)
APOGEE PXC Modular (BACnet)
APOGEE MEC (PPC) (P2 Ethernet)
PLUSCONTROL 1st Gen
Google Android

Install updates from vendor's website.

Nucleus ReadyStart - addressed in versions 4.1.1, 2017.02.4
Google Android - addressed in versions 9 2022-01-05, 10 2022-01-05, 11 2022-01-05, 12 2022-01-05

• https://cert-portal.siemens.com/productcert/pdf/ssa-044112.pdf

• Multiple vulnerabilities in Siemens Nucleus RTOS TCP/IP Stack
• Multiple vulnerabilities in Siemens APOGEE and TALON Products
• Multiple vulnerabilities in Siemens Capital VSTAR
• Multiple vulnerabilities in Google Android
• Multiple vulnerabilities in Siemens PLUSCONTROL 1st Gen