Compact DAB Transmitter: Authentication Bypass by Assumed-Immutable Data
CVE-2024-3741 is a high-severity authentication bypass by assumed-immutable data vulnerability in Compact DAB Transmitter from Electrolink, 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 Compact DAB Transmitter versions: 10W; 100W; 250W. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.49% 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 Compact DAB Transmitter 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 |
|---|---|---|---|
| Electrolink | Compact DAB Transmitter | 10W; 100W; 250W | Not stated |
| Electrolink | Medium DAB Transmitter | 500W; 1kW; 2kW | Not stated |
| Electrolink | High Power DAB Transmitter | 2.5kW; 3kW; 4kW; 5kW | Not stated |
| Electrolink | Compact FM Transmitter | Compact FM Transmitter; 500W; 1kW; 2kW | Not stated |
| Electrolink | Modular FM Transmitter | 3kW; 5kW; 10kW; 15kW; 20kW; 30kW | Not stated |
| Electrolink | Digital FM Transmitter | 15W through 40kW; 15W | Not stated |
| Electrolink | VHF TV Transmitter | BI; BIII | Not stated |
| Electrolink | UHF TV Transmitter | 10W through 5kW; 10W | 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
- NoneNo data is disclosed.
- Integrity
- HighData or code can be modified at will.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N. Scored by CNA (hq.dhs.gov).
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 8.7 | High | CNA (hq.dhs.gov) |
| CVSS 3.1 | 7.5 | High | CNA (hq.dhs.gov) |
Official description
Electrolink transmitters are vulnerable to an authentication bypass vulnerability affecting the login cookie. An attacker can set an arbitrary value except 'NO' to the login cookie and have full system access.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Authentication Bypass by Assumed-Immutable Data
The authentication scheme or implementation uses key data elements that are assumed to be immutable, but can be controlled or modified by the attacker.
How developers prevent this class of flaw
- Implement proper protection for immutable data (e.g. environment variable, hidden form fields, etc.)
More Authentication Bypass by Assumed-Immutable Data vulnerabilities (CWE-302)
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 Compact DAB Transmitter
- 8.8 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
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