QNAP Systems QVPN Device Client/Qsync/Qfinder Pro on macOS toctou

HistoryDiffrelatejsonxmlCTI

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.7	$0-$5k	0.00

Summaryinfo

A vulnerability was found in QNAP Systems QVPN Device Client, Qsync and Qfinder Pro on macOS. It has been declared as critical. The impacted element is an unknown function. Such manipulation leads to toctou. This vulnerability is documented as CVE-2024-53694. The attack needs to be performed locally. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in QNAP Systems QVPN Device Client, Qsync and Qfinder Pro on macOS (version now known) and classified as critical. Affected by this issue is some unknown processing. The manipulation with an unknown input leads to a toctou vulnerability. Using CWE to declare the problem leads to CWE-367. The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state. Impacted is confidentiality, integrity, and availability. CVE summarizes:

A time-of-check time-of-use (TOCTOU) race condition vulnerability has been reported to affect several product versions. If exploited, the vulnerability could allow local attackers who have gained user access to gain access to otherwise unauthorized resources. We have already fixed the vulnerability in the following versions: QVPN Device Client for Mac 2.2.5 and later Qsync for Mac 5.1.3 and later Qfinder Pro Mac 7.11.1 and later

The weakness was released by Mykola Grymalyuk as qsa-24-51. The advisory is shared for download at qnap.com. This vulnerability is handled as CVE-2024-53694 since 11/22/2024. The exploitation is known to be difficult. The attack needs to be approached locally. There are neither technical details nor an exploit publicly available.

Upgrading eliminates this vulnerability.

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Productinfo

Vendor

QNAP Systems

Name

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔍
CNA CVSS-BT Score: 🔍
CNA Vector: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.7

VulDB Base Score: 7.0
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Toctou
CWE: CWE-367 / CWE-362
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/22/2024 🔍
03/07/2025 +105 days 🔍
03/07/2025 +0 days 🔍
03/07/2025 +0 days 🔍

Sourcesinfo

Advisory: qsa-24-51
Researcher: Mykola Grymalyuk
Status: Confirmed

CVE: CVE-2024-53694 (🔍)
GCVE (CVE): GCVE-0-2024-53694
GCVE (VulDB): GCVE-100-298976

Entryinfo

Created: 03/07/2025 18:13
Changes: 03/07/2025 18:13 (66)
Complete: 🔍
Cache ID: 216::103