CVE-2021-25677 - CVE House
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Status published Medium CVE-2021-25677

A vulnerability has been identified in APOGEE PXC Compact (BACnet)...

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

APOGEE PXC Compact (BACnet), APOGEE PXC Compact (P2 Ethernet), APOGEE PXC Modular (BACnet), APOGEE PXC Modular (P2 Ethernet), Nucleus NET, Nucleus ReadyStart V3, Nucleus ReadyStart V4, Nucleus Source Code, SIMOTICS CONNECT 400, TALON TC Compact (BACnet), TALON TC Modular (BACnet)
Vulnerable Versions:
All versions < V3.5.5, All versions < V2.8.20, All versions, All versions < V2017.02.3, All versions < V2017.02.4, All versions < V4.1.0, Versions including affected DNS modules, All versions < V0.5.0.0, All versions >= V0.5.0.0 < V1.0.0.0

Timeline

Official Publish: April 22nd, 2021
Last Modified: August 3rd, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C

Weaknesses (CWE)

CWE-330

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.