C300: Debug Messages Revealing Unnecessary Information
CVE-2023-5392 is a high-severity debug messages revealing unnecessary information vulnerability in C300 from Honeywell, 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 C300 versions: 520.2 through 520.2 TCU4; 510.1 through 510.2 HF13; 520.1 through 520.1 TCU4, and others listed below. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.48% 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 C300 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 |
|---|---|---|---|
| Honeywell | C300 | 520.2 through 520.2 TCU4; 510.1 through 510.2 HF13; 520.1 through 520.1 TCU4; 511.1 through 511.5 TCU4 HF3; 520.2 TCU4 HFR2 through 511.5 TCU4 HF3; 510.1 through 510.2_hf13; 511.1 through 511.5_tcu4_hf3; 520.1 through 520.1_tcu4; and 2 more ranges | 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 CNA (honeywell.com).
Official description
C300 information leak due to an analysis feature which allows extracting more memory over the network than required by the function. Honeywell recommends updating to the most recent version of the product. See Honeywell Security Notification for recommendations on upgrading and versioning.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Debug Messages Revealing Unnecessary Information
The product fails to adequately prevent the revealing of unnecessary and potentially sensitive system information within debugging messages.
How developers prevent this class of flaw
- Ensure that a debug message does not reveal any unnecessary information during the debug process for the intended response.
More Debug Messages Revealing Unnecessary Information vulnerabilities (CWE-1295)
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
Other references
Other vulnerabilities in C300
- 7.5 High severity
- 7.5 High severity
- 9.8 Critical severity
- 7.5 High severity
Recent Debug Messages Revealing Unnecessary Information vulnerabilities
- 7.5 High severity
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