Home Flex: Improper Access Control
CVE-2024-23920 is a high-severity improper access control vulnerability in Home Flex from ChargePoint, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited from the same local network by an unauthenticated attacker, without any action from a user. Affected Home Flex versions: all versions. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.51% 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 Home Flex you run against the affected versions below, and install the vendor's latest release.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| ChargePoint | Home Flex | all versions | Not stated |
| Chargepoint | Home Flex Nema 14-50 Plug Firmware | Not specified in the record | Not stated |
| Chargepoint | Home Flex Hardwired Firmware | Not specified in the record | Not stated |
| Chargepoint | Home Flex Nema 6-50 Plug Firmware | Not specified in the record | 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
- AdjacentThe attacker must be on the same local network segment.
- 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
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (hq.dhs.gov).
Official description
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of ChargePoint Home Flex charging stations. Authentication is not required to exploit this vulnerability. The specific flaw exists within the onboardee module. The issue results from improper access control. An attacker can leverage this vulnerability to execute code in the context of root.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Access Control
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
How developers prevent this class of flaw
- Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.
- Compartmentalize the system to have safe areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area. Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.
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
Third-party and government advisories
- zerodayinitiative.com/advisories/ZDI-24-1048/Third Party Advisory
Other vulnerabilities in Home Flex
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 8.8 High severity
- 8.8 High severity
- 8.8 High severity
Recent Improper Access Control vulnerabilities
- 7.5 High severity
- 7.5 High severity
- 8.8 High severity
- 8.1 High severity
- 7.7 High severity
- 7.3 High severity
Spotted an error? Tell us.