CVE-2017-11564 in EyeOn Baby Monitor DCS-825L
Summary
by MITRE
The D-Link EyeOn Baby Monitor (DCS-825L) 1.08.1 has multiple command injection vulnerabilities in the web service framework. An attacker can forge malicious HTTP requests to execute commands; authentication is required before executing the attack.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 03/17/2020
The CVE-2017-11564 vulnerability targets the D-Link EyeOn Baby Monitor model DCS-825L running firmware version 1.08.1, representing a critical command injection flaw within the device's web service framework. This vulnerability falls under the CWE-77 command injection category, where malicious commands can be executed through improperly sanitized input parameters. The affected device operates as a network-connected baby monitor that provides remote viewing capabilities, making it an attractive target for attackers seeking persistent access to residential surveillance systems. The vulnerability exists in the web interface implementation where user-supplied parameters are not adequately validated or escaped before being processed by the underlying system commands.
The technical exploitation of this vulnerability requires an attacker to construct malicious HTTP requests that can be submitted to the device's web service endpoints. This command injection occurs when the device's web framework fails to properly sanitize input data before executing system commands, allowing an attacker to inject arbitrary commands that will be executed with the privileges of the web service process. The authentication requirement means that an attacker must first obtain valid credentials to the device, typically through credential guessing, default password exploitation, or other initial compromise techniques. This requirement does not eliminate the severity of the vulnerability, as once authenticated, the attacker can execute any command that the web service process has permission to run, potentially including system-level operations that could compromise the entire device or allow lateral movement within a network.
The operational impact of this vulnerability extends beyond simple command execution, as it can enable attackers to gain persistent access to residential surveillance systems, potentially allowing for continuous monitoring of private spaces. The vulnerability's presence in a consumer device that is often left unattended and unpatched creates a significant risk for residential security systems. Attackers could potentially use this vulnerability to modify device settings, access stored video feeds, disable security features, or even use the device as a pivot point for attacking other networked devices. The web service framework's command injection vulnerability represents a fundamental flaw in input validation that could allow for privilege escalation, data exfiltration, or complete device compromise. The device's role as a network-connected surveillance tool makes it particularly valuable for attackers seeking to establish persistent monitoring capabilities within residential environments.
Mitigation strategies for this vulnerability should include immediate firmware updates from D-Link to address the command injection flaws in the web service framework. Organizations and individuals should also implement network segmentation to isolate surveillance devices from critical network segments, employ strong authentication mechanisms with unique passwords for each device, and regularly audit device configurations to ensure that default settings have been changed. Network monitoring should be implemented to detect unusual traffic patterns that might indicate exploitation attempts, particularly around the web service ports used by the device. The vulnerability's classification under CWE-77 and its potential for privilege escalation aligns with ATT&CK techniques involving command and script execution, as well as persistence mechanisms. Regular security assessments of networked consumer devices are essential to identify similar vulnerabilities that could provide attackers with unauthorized access to residential surveillance infrastructure. Given the nature of the vulnerability, it is recommended that all affected devices be taken offline until proper security measures and firmware updates are implemented to prevent exploitation.