CVE-2019-25437 in Video Management System
Summary
by MITRE • 02/21/2026
Foscam Video Management System 1.1.6.6 contains a buffer overflow vulnerability in the UID field that allows local attackers to crash the application by supplying an excessively long string. Attackers can input a 5000-character buffer into the UID parameter during device addition to trigger an application crash when the Login Check function is invoked.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 02/21/2026
The Foscam Video Management System version 1.1.6.6 presents a critical buffer overflow vulnerability that fundamentally compromises system stability and security integrity. This vulnerability exists within the UID field processing mechanism, specifically during the device addition workflow where the system validates user credentials through the Login Check function. The flaw represents a classic stack-based buffer overflow condition that occurs when unvalidated input exceeds the allocated buffer space, creating a dangerous condition that can be exploited by malicious actors. The vulnerability's impact extends beyond simple application instability, as it provides a potential entry point for more sophisticated attacks that could lead to complete system compromise.
The technical exploitation of this vulnerability requires minimal prerequisites, as local attackers can simply craft a 5000-character string to be inserted into the UID parameter during device registration. This specific length threshold indicates that the system allocates a buffer that cannot accommodate such input, leading to memory corruption that ultimately results in application termination. The vulnerability manifests when the Login Check function processes the malformed UID input, causing the application to crash due to the buffer overflow condition. This type of vulnerability falls under CWE-121 which describes stack-based buffer overflow conditions, where insufficient bounds checking allows attackers to overwrite adjacent memory locations. The attack vector is particularly concerning because it requires only local access, meaning that any user with system privileges can exploit this weakness without requiring network connectivity or complex attack chains.
The operational impact of this vulnerability creates significant security risks for organizations relying on Foscam VMS for surveillance operations. When an application crash occurs due to buffer overflow exploitation, it can lead to complete service disruption, potentially leaving critical surveillance systems unavailable during security incidents. The vulnerability's local nature means that attackers do not need to bypass network security controls or perform complex reconnaissance, making it an attractive target for malicious insiders or attackers who have already gained system access. Additionally, the crash condition can potentially be leveraged as a stepping stone for more advanced exploitation techniques, as the memory corruption may allow for code execution in some scenarios. This vulnerability directly impacts the availability aspect of the CIA triad, as the system cannot maintain consistent operation when subjected to this attack vector.
Organizations utilizing Foscam Video Management System should immediately implement mitigation strategies to address this vulnerability. The most effective approach involves applying the vendor-provided security patches or updates that correct the buffer overflow condition through proper input validation and bounds checking mechanisms. System administrators should also implement strict input validation policies that enforce maximum length limits on all user-supplied parameters, particularly those used in authentication workflows. Network segmentation and privilege separation can help limit the potential impact of local exploitation attempts, while regular monitoring of system logs should be implemented to detect any unauthorized access attempts or abnormal application behavior. The vulnerability's presence highlights the importance of maintaining up-to-date security controls and implementing defense-in-depth strategies that protect against both known and emerging threats. From an ATT&CK framework perspective, this vulnerability aligns with techniques related to privilege escalation and execution through local system access, emphasizing the need for comprehensive endpoint protection measures.