CVE-2025-23123 in UniFi Protect Cameras
Summary
by MITRE • 05/19/2025
A malicious actor with access to the management network could execute a remote code execution (RCE) by exploiting a heap buffer overflow vulnerability in the UniFi Protect Cameras (Version 4.75.43 and earlier) firmware.
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Analysis
by VulDB Data Team • 05/19/2025
The vulnerability identified as CVE-2025-23123 represents a critical heap buffer overflow flaw within the UniFi Protect Cameras firmware affecting versions 4.75.43 and earlier. This issue arises from inadequate input validation mechanisms within the camera management interface, specifically when processing network requests containing malformed data structures. The vulnerability exists in the memory management subsystem where untrusted input is copied into heap-allocated buffers without proper bounds checking, creating an exploitable condition that allows arbitrary code execution. The heap buffer overflow occurs during the processing of management network communications, making it accessible to attackers who have network access to the camera's management interface.
The technical exploitation of this vulnerability follows a classic buffer overflow attack pattern where malicious input triggers memory corruption in the heap memory space. When the camera firmware processes a specially crafted request through its management network interface, the insufficient boundary checking allows an attacker to overwrite adjacent heap memory locations. This memory corruption can be leveraged to overwrite function pointers, return addresses, or other critical control data structures within the application's memory space. The vulnerability is particularly dangerous because it operates within the management network context, which typically has elevated privileges and access to camera configuration functions. Attackers can potentially execute arbitrary code with the privileges of the camera management process, which often runs with system-level access.
The operational impact of this vulnerability extends beyond simple remote code execution to encompass complete system compromise of affected UniFi Protect cameras. An attacker with access to the management network can gain persistent access to the camera's file system, potentially enabling data exfiltration, modification of camera configurations, or establishment of backdoor access points. The vulnerability affects the core functionality of the UniFi Protect ecosystem, as compromised cameras can serve as entry points for broader network infiltration. The management network typically includes administrative interfaces, configuration services, and network communication protocols that provide attackers with extensive control over the camera's operational parameters and security settings. This vulnerability undermines the fundamental security assumptions of the UniFi Protect platform, potentially allowing attackers to create persistent surveillance access points or use compromised cameras as pivoting points for lateral movement within network environments.
Organizations should prioritize immediate firmware updates to address this vulnerability, as the attack surface includes all UniFi Protect cameras running affected firmware versions. Network segmentation strategies should be implemented to isolate management networks from general network traffic, reducing the attack surface for potential exploitation. The mitigation approach should include monitoring network traffic for suspicious management interface communications and implementing intrusion detection systems to identify potential exploitation attempts. Security teams should conduct comprehensive vulnerability assessments of their UniFi Protect deployments to identify all affected devices and ensure proper patch management protocols are in place. Additionally, network administrators should consider implementing network access controls and firewall rules that restrict management network access to authorized personnel only, reducing the probability of successful exploitation attempts. The vulnerability aligns with CWE-121 heap-based buffer overflow conditions and represents a significant risk under ATT&CK framework category T1210 exploiting vulnerabilities for remote code execution.
The remediation process requires careful coordination between network administrators and security teams to ensure proper patch deployment without disrupting camera operations. Firmware updates should be tested in controlled environments before widespread deployment, and rollback procedures should be established in case of update failures. Organizations should also implement network monitoring solutions that can detect anomalous traffic patterns consistent with exploitation attempts, particularly those targeting the management interfaces of networked security devices. Regular security assessments of networked camera systems should be conducted to identify similar vulnerabilities and ensure overall network security posture remains robust against evolving threats. The vulnerability demonstrates the importance of maintaining current firmware versions and implementing comprehensive security controls for all networked devices, particularly those with management interfaces that provide elevated system access.