Experion Server: Stack-based Buffer Overflow
CVE-2023-5401 is a high-severity stack-based buffer overflow vulnerability in Experion Server from Honeywell, with a CVSS 3.1 base score of 8.1 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected Experion Server 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 0.75% chance of exploitation within 30 days, higher than 55% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of Experion Server 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 | Experion Server | 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 | 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
- HighSuccess depends on conditions outside the attacker's control.
- 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
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (honeywell.com).
Official description
Server receiving a malformed message based on a using the specified key values can cause a stack overflow vulnerability which could lead to an attacker performing remote code execution or causing a failure. 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: Stack-based Buffer Overflow
The product writes past the end of a buffer that was allocated on the stack.
How developers prevent this class of flaw
- Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index checking. D3-SFCV (Stack Frame Canary Validation) from D3FEND discusses canary-based detection in detail.
- Use an abstraction library to abstract away risky APIs. Not a complete solution.
- Implement and perform bounds checking on input.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other references
Other vulnerabilities in Experion Server
- 8.1 High severity
- 8.1 High severity
- 8.1 High severity
- 8.1 High severity
- 7.4 High severity
- 8.1 High severity
Recent Stack-based Buffer Overflow vulnerabilities
- 7.5 High severity
- 8.0 High severity
- 7.5 High severity
- 9.8 Critical severity
- 9.8 Critical severity
- 9.1 Critical severity
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