CyberSecBulletin
CVE-2024-21872NVD status: Deferred

Compact DAB Transmitter: Reliance on Cookies without Validation and Integrity Checking

Published Updated By the CyberSecBulletin desk

CVE-2024-21872 is a high-severity reliance on cookies without validation and integrity checking 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 0.55% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Check which version of Compact DAB Transmitter you run against the affected versions below, and install the vendor's latest release.
  2. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
ElectrolinkCompact DAB Transmitter10W; 100W; 250WNot stated
ElectrolinkMedium DAB Transmitter500W; 1kW; 2kWNot stated
ElectrolinkHigh Power DAB Transmitter2.5kW; 3kW; 4kW; 5kWNot stated
ElectrolinkCompact FM TransmitterCompact FM Transmitter; 500W; 1kW; 2kWNot stated
ElectrolinkModular FM Transmitter3kW; 5kW; 10kW; 15kW; 20kW; 30kWNot stated
ElectrolinkDigital FM Transmitter15W through 40kWNot stated
ElectrolinkVHF TV TransmitterBI; BIIINot stated
ElectrolinkUHF TV Transmitter10W through 5kWNot 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 (hq.dhs.gov).

Scoring systemScoreSeverityScored by
CVSS 4.08.7HighCNA (hq.dhs.gov)
CVSS 3.17.5HighCNA (hq.dhs.gov)

Official description

The device allows an unauthenticated attacker to bypass authentication and modify the cookie to reveal hidden pages that allows more critical operations to the transmitter.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Reliance on Cookies without Validation and Integrity Checking

The product relies on the existence or values of cookies when performing security-critical operations, but it does not properly ensure that the setting is valid for the associated user.

How developers prevent this class of flaw

  • Avoid using cookie data for a security-related decision.
  • Perform thorough input validation (i.e.: server side validation) on the cookie data if you're going to use it for a security related decision.
  • Add integrity checks to detect tampering.

More Reliance on Cookies without Validation and Integrity Checking vulnerabilities (CWE-565)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in Compact DAB Transmitter

All Compact DAB Transmitter vulnerabilities

Recent Reliance on Cookies without Validation and Integrity Checking vulnerabilities

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