CVE-2020-28388

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 < V5.2), Nucleus ReadyStart V3 (All versions < V2012.12), Nucleus Source Code (All versions), PLUSCONTROL 1st Gen (All versions), TALON TC Compact (BACnet) (All versions < V3.5.5), TALON TC Modular (BACnet) (All versions < V3.5.5). Initial Sequence Numbers (ISNs) for TCP connections are derived from an insufficiently random source. As a result, the ISN of current and future TCP connections could be predictable. An attacker could hijack existing sessions or spoof future ones.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.19%
Vendor Advisory siemens.com Vendor Advisory siemens.com
Affected: Siemens APOGEE PXC Compact (BACnet)
Affected: Siemens APOGEE PXC Compact (P2 Ethernet)
Affected: Siemens APOGEE PXC Modular (BACnet)
Affected: Siemens APOGEE PXC Modular (P2 Ethernet)
Affected: Siemens Nucleus NET
Affected: Siemens Nucleus ReadyStart V3
Affected: Siemens Nucleus Source Code
Affected: Siemens PLUSCONTROL 1st Gen
Affected: Siemens TALON TC Compact (BACnet)
Affected: Siemens TALON TC Modular (BACnet)
Published at:
Updated at:

References

Link Tags
https://cert-portal.siemens.com/productcert/pdf/ssa-362164.pdf vendor advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-344238.pdf vendor advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-436469.pdf
https://cert-portal.siemens.com/productcert/pdf/ssa-180579.pdf

Frequently Asked Questions

What is the severity of CVE-2020-28388?
CVE-2020-28388 has been scored as a medium severity vulnerability.
How to fix CVE-2020-28388?
To fix CVE-2020-28388, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-28388 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-28388 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-28388?
CVE-2020-28388 affects Siemens APOGEE PXC Compact (BACnet), Siemens APOGEE PXC Compact (P2 Ethernet), Siemens APOGEE PXC Modular (BACnet), Siemens APOGEE PXC Modular (P2 Ethernet), Siemens Nucleus NET, Siemens Nucleus ReadyStart V3, Siemens Nucleus Source Code, Siemens PLUSCONTROL 1st Gen, Siemens TALON TC Compact (BACnet), Siemens TALON TC Modular (BACnet).
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