Bitcoin ATM Douro machines: Improper Preservation of Permissions
CVE-2024-0674 is a high-severity improper preservation of permissions vulnerability in Bitcoin ATM Douro machines from Lamassu, with a CVSS 3.1 base score of 7.8 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. Affected Bitcoin ATM Douro machines versions: 7.1. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.13% 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 Bitcoin ATM Douro machines you run against the affected versions below, and install the vendor's latest release.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Lamassu | Bitcoin ATM Douro machines | 7.1 | Not stated |
| Lamassu | Douro Firmware | 7.1 | Not stated |
| Lamassu | Douro Ii Firmware | 7.1 | 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
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- 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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 6.3 | Medium | CNA (incibe.es) |
| CVSS 3.1 | 7.8 | High | NVD |
Official description
Privilege escalation vulnerability in Lamassu Bitcoin ATM Douro machines, in its 7.1 version, which could allow a local user to acquire root permissions by modifying the updatescript.js, inserting special code inside the script and creating the done.txt file. This would cause the watchdog process to run as root and execute the payload stored in the updatescript.js.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Preservation of Permissions
The product does not preserve permissions or incorrectly preserves permissions when copying, restoring, or sharing objects, which can cause them to have less restrictive permissions than intended.
More Improper Preservation of Permissions vulnerabilities (CWE-281)
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
Other vulnerabilities in Bitcoin ATM Douro machines
- 7.1 High severity
Recent Improper Preservation of Permissions vulnerabilities
- 8.8 High severity
- 9.8 Critical severity
- 8.8 High severity
- 8.8 High severity
- 7.8 High severity
- 8.8 High severity
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