CVE-2025-52867 in Qsync Central
Summary
by MITRE • 10/03/2025
An uncontrolled resource consumption vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack.
We have already fixed the vulnerability in the following version: Qsync Central 5.0.0.2 ( 2025/07/31 ) and later
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Analysis
by VulDB Data Team • 10/04/2025
The vulnerability identified as CVE-2025-52867 represents a critical uncontrolled resource consumption flaw within Qsync Central software that poses significant operational risks to affected organizations. This weakness falls under the category of resource exhaustion attacks where malicious actors can systematically consume system resources to render services unavailable. The vulnerability specifically affects Qsync Central versions prior to 5.0.0.2 released on July 31, 2025, indicating that organizations running older versions remain exposed to potential exploitation attempts. The flaw's classification aligns with CWE-400 which encompasses unspecified resource exhaustion vulnerabilities, making it particularly dangerous as it can be leveraged to create sustained denial-of-service conditions.
The technical implementation of this vulnerability stems from inadequate resource management within the Qsync Central application, allowing authenticated users to exploit specific processing routines that do not properly validate resource consumption limits. When a remote attacker successfully compromises a user account, they can leverage this privilege to execute resource-intensive operations that gradually consume CPU cycles, memory allocations, or network bandwidth. This uncontrolled consumption pattern can lead to system instability, application crashes, or complete service unavailability, effectively transforming legitimate user access into a weapon for disrupting business operations. The vulnerability's exploitation requires only basic user-level credentials, making it particularly concerning as it can be initiated by attackers who have gained minimal access to the system.
From an operational standpoint, the impact of CVE-2025-52867 extends beyond simple service disruption to encompass broader business continuity concerns and potential financial losses. Organizations utilizing Qsync Central may experience extended downtime as affected systems struggle to maintain performance under resource exhaustion conditions. The vulnerability's ability to be exploited by authenticated users means that insider threats or compromised accounts could be leveraged to create persistent DoS conditions that are difficult to distinguish from legitimate high-usage patterns. This characteristic makes detection and mitigation particularly challenging, as the malicious activity may appear to be normal system behavior until significant performance degradation occurs, aligning with ATT&CK technique T1499.004 for network denial of service attacks.
Organizations should immediately implement the recommended remediation by upgrading to Qsync Central version 5.0.0.2 or later, which contains the necessary patches to address the resource consumption flaw. Additional mitigations should include implementing strict access controls to prevent unauthorized account compromise, monitoring for unusual resource usage patterns, and establishing automated alerts for system performance degradation. Network segmentation and rate limiting mechanisms can provide additional defense-in-depth layers to limit the potential impact of exploitation attempts. Security teams should also conduct thorough vulnerability assessments to identify any other systems that might be running vulnerable versions of Qsync Central or similar software components that could be susceptible to analogous resource exhaustion attacks. The fix implemented in version 5.0.0.2 demonstrates proper resource management practices that prevent uncontrolled consumption while maintaining legitimate application functionality, serving as a model for similar vulnerability remediation efforts across the cybersecurity industry.