6.5
CVSSv3

CVE-2020-27737

Published: 22/04/2021 Updated: 08/08/2023
CVSS v2 Base Score: 5.8 | Impact Score: 4.9 | Exploitability Score: 8.6
CVSS v3 Base Score: 6.5 | Impact Score: 4.2 | Exploitability Score: 2.2
VMScore: 516
Vector: AV:N/AC:M/Au:N/C:P/I:N/A:P

Vulnerability Summary

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.

Vulnerability Trend

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siemens simotics connect 400 firmware

siemens nucleus net

siemens nucleus source code -

siemens nucleus readystart v3

siemens nucleus readystart v4

ICS Advisories

Siemens SIMOTICS CONNECT 400 (Update A)
Critical Infrastructure Sectors: Energy