Vulnerability · Published Feb 9, 2021 · Assigned by siemens
CVE-2020-28388
Medium 6.5
In plain English
A medium-severity security flaw in APOGEE PXC Compact (BACnet) from Siemens. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.4% (higher than 72% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Siemens | APOGEE PXC Compact (BACnet) | All versions < V3.5.5 |
| Siemens | APOGEE PXC Compact (P2 Ethernet) | All versions < V2.8.20 |
| Siemens | APOGEE PXC Modular (BACnet) | All versions < V3.5.5 |
| Siemens | APOGEE PXC Modular (P2 Ethernet) | All versions < V2.8.20 |
| Siemens | Nucleus NET | All versions < V5.2 |
| Siemens | Nucleus ReadyStart V3 | All versions < V2012.12 |
| Siemens | Nucleus Source Code | All versions |
| Siemens | PLUSCONTROL 1st Gen | All versions |
| Siemens | TALON TC Compact (BACnet) | All versions < V3.5.5 |
| Siemens | TALON TC Modular (BACnet) | All versions < V3.5.5 |
Weakness: CWE-342 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L/E:P/RL:O/RC:C