CVE-2020-27737
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 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 response parsing functionality does not properly validate various length and counts of the records. The parsing of malformed responses could result in a read 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 or leak the memory past the allocated structure.
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 | <2017.02.3 | |
| Siemens Nucleus ReadyStart v4 | <4.1.0 | |
| Siemens Nucleus Source Code |
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Reference Links
Frequently Asked Questions
What is CVE-2020-27737?
CVE-2020-27737 is a vulnerability identified in APOGEE PXC Compact and APOGEE PXC Modular devices, as well as Siemens Nucleus NET and Nucleus R software.
What is the severity of CVE-2020-27737?
The severity of CVE-2020-27737 is medium with a CVSS score of 6.5.
Which software and devices are affected by CVE-2020-27737?
CVE-2020-27737 affects APOGEE PXC Compact (BACnet), APOGEE PXC Compact (P2 Ethernet), APOGEE PXC Modular (BACnet), APOGEE PXC Modular (P2 Ethernet), Nucleus NET, Nucleus R, Siemens Simotics Connect 400 Firmware, and Siemens Nucleus Readystart V3.
How can I fix CVE-2020-27737?
To fix CVE-2020-27737, it is recommended to update the affected software and devices to versions V3.5.5 for APOGEE PXC Compact and APOGEE PXC Modular devices, and apply the necessary patches and updates provided by Siemens for Nucleus NET, Nucleus R, Siemens Simotics Connect 400 Firmware, and Siemens Nucleus Readystart V3.
Where can I find more information about CVE-2020-27737?
You can find more information about CVE-2020-27737 in the following references: [link1], [link2], [link3].
- agent/first-publish-date
- agent/last-modified-date
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- agent/software-canonical-lookup-request
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- agent/softwarecombine
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- collector/mitre-cve
- source/MITRE
- vendor/siemens
- canonical/siemens simotics connect 400 firmware
- canonical/siemens simotics connect 400
- canonical/siemens nucleus net
- canonical/siemens nucleus readystart v3
- canonical/siemens nucleus readystart v4
- canonical/siemens nucleus source code