CVE-2020-28388
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...
No known exploitation. EPSS puts it in the 70th percentile. A vendor fix is available.
What to do
The vendor has published a fix. Version details are below where the sources state them.
What it is
From the CVE record
APOGEE PXC / TALON TC field panels (BACnet before V3.5.5 and P2 Ethernet before V2.8.20) contain multiple vulnerabilities: - CVE-2022-45937: A privilege management vulnerability that could allow low privilege authenticated attackers to gain high privilege access. - CVE-2020-28388: Predictable Initial Sequence Numbers in the TCP/IP Stack of Nucleus RTOS (real-time operating system) used by the affected products. - Several vulnerabilities in the DNS (domain name service) implementation of Nucleus RTOS. Siemens has released updates for the affected products and recommends to update to the latest versions.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
1.4% chance of exploitation activity in the next 30 days, which ranks it in the 70th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
4 events over 1381 days, from the signal feeds we watch.
- Patch availablerecord updated
- Publishedweakness classified
Affected products
- APOGEE PXC Compact (BACnet)ICS / OT / IoT
- APOGEE PXC Compact (P2 Ethernet)ICS / OT / IoT
- APOGEE PXC Modular (BACnet)ICS / OT / IoT
- APOGEE PXC Modular (P2 Ethernet)ICS / OT / IoT
- Nucleus NETICS / OT / IoT
- Nucleus ReadyStart V3ICS / OT / IoT
- Nucleus Source CodeICS / OT / IoT
- PLUSCONTROL 1st GenICS / OT / IoT
And 14 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Scored 6.5 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality NoneNo confidentiality impact
- Integrity LowData modification is possible but limited in scope or consequence
- Availability LowReduced performance or intermittent disruption of service
Weaknesses
Sources
References in the record
- cert-portal.siemens.com/productcert/csaf/ssa-180579.json
- cert-portal.siemens.com/productcert/html/ssa-180579.html
- cert-portal.siemens.com/productcert/pdf/ssa-180579.pdf
And 17 more references. See all after sign-in
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