Media Streaming add-on: Authorization Bypass Through User-Controlled Key
CVE-2024-50395 is a high-severity authorization bypass through user-controlled key vulnerability in Media Streaming add-on from QNAP, 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. The record lists versions 500.1.1.6 ( 2024/08/02 ), 500.1.1.6 as the first without the flaw, so updating Media Streaming add-on to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 1.36% chance of exploitation within 30 days, higher than 72% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Media Streaming add-on to 500.1.1.6 ( 2024/08/02 ) or 500.1.1.6, whichever matches your release line, or a later version.
- Read the advisory on qnap.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| QNAP | Media Streaming add-on | 500.1.x up to, but not including, 500.1.1.6 ( 2024/08/02 ); 500.1.0 up to, but not including, 500.1.1.6 | 500.1.1.6 ( 2024/08/02 ), 500.1.1.6 |
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 NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 6.9 | Medium | CNA (qnapsecurity.com.tw) |
| CVSS 3.1 | 8.8 | High | NVD |
Official description
An authorization bypass through user-controlled key vulnerability has been reported to affect Media Streaming add-on. If exploited, the vulnerability could allow local network attackers to gain privilege. We have already fixed the vulnerability in the following version: Media Streaming add-on 500.1.1.6 ( 2024/08/02 ) and later
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Authorization Bypass Through User-Controlled Key
The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
How developers prevent this class of flaw
- For each and every data access, ensure that the user has sufficient privilege to access the record that is being requested.
- Make sure that the key that is used in the lookup of a specific user's record is not controllable externally by the user or that any tampering can be detected.
- Use encryption in order to make it more difficult to guess other legitimate values of the key or associate a digital signature with the key so that the server can verify that there has been no tampering.
More Authorization Bypass Through User-Controlled Key vulnerabilities (CWE-639)
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
Advisories
Other vulnerabilities in Media Streaming add-on
- 9.1 Critical severity
- 7.8 High severity
- 9.8 Critical severity
- 9.8 Critical severity
Recent Authorization Bypass Through User-Controlled Key vulnerabilities
- 8.1 High severity
- 7.5 High severity
- 7.3 High severity
- 8.1 High severity
- 8.1 High severity
- 7.5 High severity
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