CVE-2021-22943 in Protect Application
Summary
by MITRE • 08/31/2021
A vulnerability found in UniFi Protect application V1.18.1 and earlier permits a malicious actor who has already gained access to a network to subsequently control the Protect camera(s) assigned to said network. This vulnerability is fixed in UniFi Protect application V1.19.0 and later.
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Analysis
by VulDB Data Team • 09/03/2021
The vulnerability identified as CVE-2021-22943 represents a critical security flaw within the UniFi Protect application ecosystem that significantly undermines the integrity of networked camera systems. This issue affects versions 1.18.1 and earlier, creating a dangerous scenario where unauthorized actors can escalate their privileges from mere network access to full control over connected surveillance cameras. The vulnerability manifests as a privilege escalation weakness that allows attackers to bypass authentication mechanisms and gain administrative control over camera devices within the protected network environment. This flaw directly impacts the fundamental security assumptions of IP-based surveillance systems where network access should not automatically translate to device control authority.
The technical implementation of this vulnerability stems from insufficient access controls and authentication checks within the UniFi Protect application's communication protocols. When an attacker gains network access to a protected network, they can exploit this flaw to manipulate camera configurations, access live video feeds, and potentially control camera functions such as pan-tilt-zoom operations, recording settings, and privacy controls. The vulnerability's exploitation requires only network-level access, making it particularly dangerous as it can be leveraged by attackers who have already breached network perimeters through other means such as credential theft, network sniffing, or lateral movement techniques. This weakness creates a direct pathway for attackers to establish persistent surveillance capabilities within the compromised network infrastructure.
The operational impact of CVE-2021-22943 extends far beyond simple unauthorized access to video feeds. Organizations relying on UniFi Protect for security monitoring face significant risks including data exfiltration through video content, unauthorized surveillance of sensitive areas, and potential use of compromised cameras for further network reconnaissance. The vulnerability can be exploited to create covert surveillance operations that bypass traditional security monitoring systems, as attackers can manipulate camera settings to avoid detection while maintaining persistent access to surveillance feeds. This risk is particularly severe for organizations in sectors such as healthcare, finance, and government where surveillance data contains sensitive information and where unauthorized access could lead to compliance violations under regulations such as HIPAA, SOX, or GDPR. The vulnerability also creates opportunities for attackers to use compromised cameras as entry points for broader network infiltration attacks, potentially enabling lateral movement throughout the enterprise infrastructure.
Security professionals should prioritize immediate mitigation through the mandatory upgrade to UniFi Protect application version 1.19.0 or later, which contains the necessary patches to address the privilege escalation vulnerability. Network administrators should also implement additional monitoring of camera network traffic to detect anomalous access patterns that may indicate exploitation attempts. Organizations should conduct comprehensive vulnerability assessments of their UniFi Protect deployments to identify all affected devices and ensure proper patch management protocols are in place. The vulnerability aligns with CWE-284 which addresses improper access control issues, and represents a clear violation of the principle of least privilege that should govern all security systems. From an attack perspective, this vulnerability maps to ATT&CK technique T1071.004 for application layer protocol usage, and could enable further techniques such as T1566 for credential harvesting or T1046 for network service discovery. Organizations should also consider implementing network segmentation strategies to limit the potential impact of such vulnerabilities and establish robust incident response procedures for detecting and responding to unauthorized camera access events.