Out-of-bounds read in Siemens products - CVE-2021-31881

Vulnerability identifier: #VU58081

CSH Severity: Medium

CVSS v4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-31881

CWE-ID: CWE-125

Exploitation vector: Adjecent network

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition. A remote attacker on the local network can create a specially crafted file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system or cause a denial of service (DoS) condition.

Nucleus NET
Nucleus Source Code
Capital VSTAR
Nucleus ReadyStart
APOGEE MBC (PPC) (BACnet)
APOGEE MBC (PPC) (P2 Ethernet)
APOGEE MEC (PPC) (BACnet)
APOGEE MEC (PPC) (P2 Ethernet)
APOGEE PXC Compact (BACnet)
APOGEE PXC Compact (P2 Ethernet)
APOGEE PXC Modular (BACnet)
APOGEE PXC Modular (P2 Ethernet)
TALON TC Compact (BACnet)
TALON TC Modular (BACnet)

Install updates from vendor's website.

Nucleus ReadyStart - addressed in versions 4.1.1, 2017.02.4

• 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