CVE-2020-28388

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 < 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.

Affected Software

VendorProductVersion RangeStatus
SiemensAPOGEE PXC Compact (BACnet)All versions < V3.5.5affected
SiemensAPOGEE PXC Compact (P2 Ethernet)All versions < V2.8.20affected
SiemensAPOGEE PXC Modular (BACnet)All versions < V3.5.5affected
SiemensAPOGEE PXC Modular (P2 Ethernet)All versions < V2.8.20affected
SiemensNucleus NETAll versions < V5.2affected
SiemensNucleus ReadyStart V3All versions < V2012.12affected
SiemensNucleus Source CodeAll versionsaffected
SiemensPLUSCONTROL 1st GenAll versionsaffected
SiemensTALON TC Compact (BACnet)All versions < V3.5.5affected
SiemensTALON TC Modular (BACnet)All versions < V3.5.5affected

Weaknesses

  • CWE-342: CWE-342: Predictable Exact Value from Previous Values

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

References