Multimedia Console: Improper Neutralization of Special Elements used in an OS Command
CVE-2023-23369 is a critical-severity improper neutralization of special elements used in an OS command vulnerability in Multimedia Console from QNAP, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists versions 2.1.2 ( 2023/05/04 ), 1.4.8 ( 2023/05/05 ) as the first without the flaw, so updating Multimedia Console to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 14.1% chance of exploitation within 30 days, which is in the top 3.37% of all scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update Multimedia Console to 2.1.2 ( 2023/05/04 ) or 1.4.8 ( 2023/05/05 ), whichever matches your release line, or a later version.
- Update QTS to 5.1.0.2399 build 20230515 or 4.3.6.2441 build 20230621 or 4.3.4.2451 build 20230621 or 4.3.3.2420 build 20230621, whichever matches your release line, or a later version.
- Update Media Streaming add-on to 500.1.1.2 ( 2023/06/12 ) or 500.0.0.11 ( 2023/06/16 ), whichever matches your release line, or a later version.
- Read the advisory on qnap.com for workarounds and exact fixed builds.
- 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 |
|---|---|---|---|
| QNAP | Multimedia Console | 2.1.x up to, but not including, 2.1.2 ( 2023/05/04 ); 1.4.x up to, but not including, 1.4.8 ( 2023/05/05 ) | 2.1.2 ( 2023/05/04 ), 1.4.8 ( 2023/05/05 ) |
| QNAP | QTS | 5.1.x up to, but not including, 5.1.0.2399 build 20230515; 4.3.6 up to, but not including, 4.3.6.2441 build 20230621; 4.3.4 up to, but not including, 4.3.4.2451 build 20230621; 4.3.3 up to, but not including, 4.3.3.2420 build 20230621; 4.2.x up to, but not including, 4.2.6 build 20230621 | 5.1.0.2399 build 20230515, 4.3.6.2441 build 20230621, 4.3.4.2451 build 20230621, 4.3.3.2420 build 20230621, 4.2.6 build 20230621 |
| QNAP | Media Streaming add-on | 500.1.x up to, but not including, 500.1.1.2 ( 2023/06/12 ); 500.0.x up to, but not including, 500.0.0.11 ( 2023/06/16 ) | 500.1.1.2 ( 2023/06/12 ), 500.0.0.11 ( 2023/06/16 ) |
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
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 9.0 | Critical | CNA (qnapsecurity.com.tw) |
| CVSS 3.1 | 9.8 | Critical | NVD |
Official description
An OS command injection vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow users to execute commands via a network. We have already fixed the vulnerability in the following versions: Multimedia Console 2.1.2 ( 2023/05/04 ) and later Multimedia Console 1.4.8 ( 2023/05/05 ) and later QTS 5.1.0.2399 build 20230515 and later QTS 4.3.6.2441 build 20230621 and later QTS 4.3.4.2451 build 20230621 and later QTS 4.3.3.2420 build 20230621 and later QTS 4.2.6 build 20230621 and later Media Streaming add-on 500.1.1.2 ( 2023/06/12 ) and later Media Streaming add-on 500.0.0.11 ( 2023/06/16 ) and later
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Neutralization of Special Elements used in an OS Command
The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command before it is sent to a downstream component.
How developers prevent this class of flaw
- If at all possible, use library calls rather than external processes to recreate the desired functionality.
- For any data that will be used to generate a command to be executed, keep as much of that data out of external control as possible. For example, in web applications, this may require storing the data locally in the session's state instead of sending it out to the client in a hidden form field.
- For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
More Improper Neutralization of Special Elements used in an OS Command vulnerabilities (CWE-78)
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 Multimedia Console
- 9.8 Critical severity
Recent Improper Neutralization of Special Elements used in an OS Command vulnerabilities
- 9.8 Critical severity
- 7.2 High severity
- 8.8 High severity
- 8.8 High severity
- 8.8 High severity
- 8.8 High severity
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