Nova 220 (EYK220F001) DDC with BACnet connection: Cleartext Transmission of Sensitive Information
CVE-2023-0053 is a high-severity cleartext transmission of sensitive information vulnerability in Nova 220 (EYK220F001) DDC with BACnet connection from Sauter-controls, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected Nova 220 (EYK220F001) DDC with BACnet connection versions: Firmware all versions through 3.3-006; BACnetstac all versions through 4.2.1. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.39% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of Nova 220 (EYK220F001) DDC with BACnet connection you run against the affected versions below, and install the vendor's latest release.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| SAUTER Controls | Nova 220 (EYK220F001) DDC with BACnet connection | Firmware all versions through 3.3-006; BACnetstac all versions through 4.2.1 | Not stated |
| SAUTER Controls | Nova 230 (EYK230F001) DDC with BACnet connection | Firmware all versions through 3.3-006; BACnetstac all versions through 4.2.1 | Not stated |
| SAUTER Controls | Nova 106 (EYK300F001) BACnet communication card | Firmware all versions through 3.3-006; BACnetstac all versions through 4.2.1 | Not stated |
| SAUTER Controls | moduNet300 (EY-AM300F001, EY-AM300F002) | Firmware all versions through 3.3-006; BACnetstac all versions through 4.2.1 | Not stated |
| Sauter-controls | Nova 220 Eyk220f001 Firmware | 3.3-006 and earlier | Not stated |
| Sauter-controls | Nova 230 Eyk230f001 Firmware | 3.3-006 and earlier | Not stated |
| Sauter-controls | Nova 106 Eyk300f001 Firmware | 3.3-006 and earlier | Not stated |
| Sauter-controls | Modunet300 Ey-am300f001 Firmware | 3.3-006 and earlier | Not stated |
| Sauter-controls | Modunet300 Ey-am300f002 Firmware | 3.3-006 and earlier | Not stated |
| Sauter-controls | Bacnetstac | 4.2.1 and earlier | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- NoneNothing can be modified.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.5 | High | CNA (hq.dhs.gov) |
| CVSS 3.1 | 7.5 | High | NVD |
Official description
SAUTER Controls Nova 200–220 Series with firmware version 3.3-006 and prior and BACnetstac version 4.2.1 and prior have only FTP and Telnet available for device management. Any sensitive information communicated through these protocols, such as credentials, is sent in cleartext. An attacker could obtain sensitive information such as user credentials to gain access to the system.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Cleartext Transmission of Sensitive Information
The product transmits sensitive or security-critical data in cleartext in a communication channel that can be sniffed by unauthorized actors.
How developers prevent this class of flaw
- Before transmitting, encrypt the data using reliable, confidentiality-protecting cryptographic protocols.
- When using web applications with SSL, use SSL for the entire session from login to logout, not just for the initial login page.
- When designing hardware platforms, ensure that approved encryption algorithms (such as those recommended by NIST) protect paths from security critical data to trusted user applications.
More Cleartext Transmission of Sensitive Information vulnerabilities (CWE-319)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- cisa.gov/uscert/ics/advisories/icsa-23-012-05Third Party Advisory, US Government Resource
Other vulnerabilities in Nova 220 (EYK220F001) DDC with BACnet connection
- 8.8 High severity
Recent Cleartext Transmission of Sensitive Information vulnerabilities
- 9.1 Critical severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 9.8 Critical severity
- 7.5 High severity
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