CVE-2021-25677
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 V3 (All versions < V2017.02.4), 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), SIMOTICS CONNECT 400 (All versions >= V0.5.0.0 < V1.0.0.0), TALON TC Compact (BACnet) (All versions < V3.5.5), TALON TC Modular (BACnet) (All versions < V3.5.5). The DNS client does not properly randomize DNS transaction IDs. That could allow an attacker to poison the DNS cache or spoof DNS resolving.
How to fix
- siemens nucleus_readystart_v32017.02.4 or later
- siemens nucleus_readystart_v44.1.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| siemens simotics_connect_400_firmware | 0.5.0.0 ≤ v | — |
| siemens nucleus_net | No range specified | — |
| siemens nucleus_readystart_v3 | v < 2017.02.4 | 2017.02.4 |
| siemens nucleus_readystart_v4 | v < 4.1.0 | 4.1.0 |
| siemens nucleus_source_code | No range specified | — |
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