CVE-2020-28388
Siemens · published 2021-02-09
Source record Collected from the National Vulnerability Database (NVD)
Description
Description by Siemens AG via the CVE Program.
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.
Status at the source
- NVD status: Modified
Affected products, as the source lists them
| Vendor | Product | Versions |
|---|---|---|
| Siemens | APOGEE PXC Compact (BACnet) | All versions < V3.5.5: affected |
| Siemens | APOGEE PXC Compact (P2 Ethernet) | All versions < V2.8.20: affected |
| Siemens | APOGEE PXC Modular (BACnet) | All versions < V3.5.5: affected |
| Siemens | APOGEE PXC Modular (P2 Ethernet) | All versions < V2.8.20: affected |
| Siemens | Nucleus NET | All versions < V5.2: affected |
| Siemens | Nucleus ReadyStart V3 | All versions < V2012.12: affected |
| Siemens | Nucleus Source Code | All versions: affected |
| Siemens | PLUSCONTROL 1st Gen | All versions: affected |
| Siemens | TALON TC Compact (BACnet) | All versions < V3.5.5: affected |
| Siemens | TALON TC Modular (BACnet) | All versions < V3.5.5: affected |
Products named in NVD's CPE match criteria (5)
cpe:2.3:a:siemens:capital_vstar:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:nucleus_net:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:nucleus_source_code:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:pluscontrol_1st_gen:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:nucleus_readystart:*:*:*:*:*:*:*:*
DeSpy has not checked any unit, hardware revision or firmware. A product missing here is not a statement that it is unaffected.
Scores, as their sources published them
- CVSS 3.1: 6.5 MEDIUM — as published by Siemens AG (Secondary)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L - CVSS 3.1: 5.3 MEDIUM — as published by NIST (Primary)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - CVSS 2.0: 5 MEDIUM — as published by NIST (Primary)
AV:N/AC:L/Au:N/C:N/I:P/A:N - SSVC — CISA's assessment (SSVC 2.0.3, CISA Coordinator): Exploitation: none · Automatable: yes · Technical impact: partial
DeSpy does not score records. These are the sources' own values.
Weaknesses
CWE-342, NVD-CWE-Other
Sources
References the source lists
- https://cert-portal.siemens.com/productcert/pdf/ssa-180579.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-344238.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-362164.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-436469.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-180579.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-344238.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-362164.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-436469.pdf
Source dates: published 2021-02-09, last changed 2026-06-17. DeSpy's copy of this version is dated 2026-09-28.
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