Description
A vulnerability has been identified in APOGEE PXC Compact (BACnet) (All versions < V3.5.5), APOGEE PXC Compact (P2 Ethernet) (All versions < V2.8.20), APOGEE PXC Modular (BACnet) (All versions < V3.5.5), APOGEE PXC Modular (P2 Ethernet) (All versions < V2.8.20), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2017.02.3), Nucleus ReadyStart V4 (All versions < V4.1.0), Nucleus Source Code (Versions including affected DNS modules), SIMOTICS CONNECT 400 (All versions < V0.5.0.0), TALON TC Compact (BACnet) (All versions < V3.5.5), TALON TC Modular (BACnet) (All versions < V3.5.5). The DNS domain name record decompression functionality does not properly validate the pointer offset values. The parsing of malformed responses could result in a read access past the end of an allocated structure. An attacker with a privileged position in the network could leverage this vulnerability to cause a denial-of-service condition.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Siemens | APOGEE PXC Compact (BACnet) | All versions < V3.5.5 | — |
| Siemens | APOGEE PXC Compact (P2 Ethernet) | All versions < V2.8.20 | — |
| Siemens | APOGEE PXC Modular (BACnet) | All versions < V3.5.5 | — |
| Siemens | APOGEE PXC Modular (P2 Ethernet) | All versions < V2.8.20 | — |
| Siemens | Nucleus NET | All versions | — |
| Siemens | Nucleus ReadyStart V3 | All versions < V2017.02.3 | — |
| Siemens | Nucleus ReadyStart V4 | All versions < V4.1.0 | — |
| Siemens | Nucleus Source Code | Versions including affected DNS modules | — |
| Siemens | SIMOTICS CONNECT 400 | All versions < V0.5.0.0 | — |
| Siemens | TALON TC Compact (BACnet) | All versions < V3.5.5 | — |
| Siemens | TALON TC Modular (BACnet) | All versions < V3.5.5 | — |
Advisories 6
- ICSA-22-349-16 Siemens APOGEE and TALON CISA ICS & IT advisories · May 6, 2025
- ICSA-21-103-13 Siemens SIMOTICS CONNECT 400 (Update A) CISA ICS & IT advisories · May 6, 2025
- WID-SEC-2023-1986 NAME:WRECK: Mehrere Schwachstellen in TCP/IP Stacks BSI CERT-Bund (WID) · Feb 12, 2024
- SSA-180579 SSA-180579: Privilege Management Vulnerability and Multiple Nucleus RTOS Vulnerabilities in APOGEE/TALON Field Panels before V3.5.5/V2.8.20 Siemens ProductCERT · Aug 8, 2023
- SSA-669158 SSA-669158: DNS Client Vulnerabilities in SIMOTICS CONNECT 400 Siemens ProductCERT · Mar 8, 2022
- SSA-705111 SSA-705111: Multiple Vulnerabilities (NAME:WRECK) in the DNS Module of Nucleus RTOS Siemens ProductCERT · Jan 11, 2022