CVE-2021-25677
First published: Thu Apr 22 2021(Updated: )
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.
Credit: productcert@siemens.com productcert@siemens.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Siemens Simotics Connect 400 Firmware | >=0.5.0.0 | |
| Siemens Simotics Connect 400 | ||
| Siemens Nucleus NET | ||
| Siemens Nucleus ReadyStart v3 | <2017.02.4 | |
| Siemens Nucleus ReadyStart v4 | <4.1.0 | |
| Siemens Nucleus Source Code |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID of this vulnerability?
The vulnerability ID is CVE-2021-25677.
What is the severity level of CVE-2021-25677?
The severity level of CVE-2021-25677 is medium (5.3).
Which software versions are affected by CVE-2021-25677?
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 (Up to version 2017.02.4), Nucleus ReadyStart V4 (Up to version 4.1.0), and Siemens Simotics Connect 400 Firmware (Version >= 0.5.0.0) are affected by CVE-2021-25677.
How can I fix the vulnerability CVE-2021-25677?
There is currently no known fix or patch available for CVE-2021-25677. It is recommended to follow the mitigation steps provided by Siemens.
Where can I find more information about CVE-2021-25677?
You can find more information about CVE-2021-25677 in the following references: - [SSA-180579](https://cert-portal.siemens.com/productcert/pdf/ssa-180579.pdf) - [SSA-669158](https://cert-portal.siemens.com/productcert/pdf/ssa-669158.pdf) - [SSA-705111](https://cert-portal.siemens.com/productcert/pdf/ssa-705111.pdf)
- agent/weakness
- agent/severity
- agent/references
- agent/author
- agent/description
- agent/type
- agent/event
- agent/first-publish-date
- agent/softwarecombine
- agent/remedy
- agent/last-modified-date
- agent/tags
- collector/nvd-api
- agent/software-canonical-lookup-request
- collector/nvd-index
- collector/mitre-cve
- source/MITRE
- vendor/siemens
- canonical/siemens simotics connect 400 firmware
- version/siemens simotics connect 400 firmware/0.5.0.0
- canonical/siemens simotics connect 400
- canonical/siemens nucleus net
- canonical/siemens nucleus readystart v3
- canonical/siemens nucleus readystart v4
- canonical/siemens nucleus source code