CVE-2020-7879 in C200 IP Camera
Summary
by MITRE • 11/30/2021
This issue was discovered when the ipTIME C200 IP Camera was synchronized with the ipTIME NAS. It is necessary to extract value for ipTIME IP camera because the ipTIME NAS send ans setCookie('[COOKIE]') . The value is transferred to the --header option in wget binary, and there is no validation check. This vulnerability allows remote attackers to execute remote command.
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Analysis
by VulDB Data Team • 12/04/2021
This vulnerability exists in the ipTIME C200 IP Camera when synchronized with the ipTIME NAS device, representing a critical security flaw that enables remote command execution. The issue stems from improper input validation within the communication protocol between these network appliances. When the ipTIME NAS sends a setCookie header containing a specific cookie value to the ipTIME IP camera, the camera processes this value without adequate sanitization or validation checks. The cookie value gets directly transferred to the --header option in the wget binary, creating a dangerous execution path where attacker-controlled data flows into a system command without proper filtering.
The technical flaw manifests as a command injection vulnerability that operates at the application layer, specifically within the network communication handling mechanisms of the ipTIME devices. This vulnerability falls under CWE-74, which describes improper neutralization of special elements used in a command, and CWE-94, which covers improper control of generation of code. The flaw allows remote attackers to inject malicious commands through the cookie value that gets processed by wget, potentially enabling arbitrary code execution on the target device. The absence of input validation creates a direct pathway for attackers to manipulate the command execution flow.
The operational impact of this vulnerability is severe and multifaceted, as it provides attackers with complete control over the affected ipTIME IP Camera device. Remote command execution capabilities allow threat actors to perform various malicious activities including data exfiltration, system modification, network reconnaissance, and potential lateral movement within the network. The vulnerability affects devices that are typically deployed in security-sensitive environments such as homes, small offices, and retail locations, making them prime targets for exploitation. Given that these devices often lack robust security controls and may be accessible from the internet, the risk of exploitation is significantly elevated.
Mitigation strategies should focus on implementing proper input validation and sanitization mechanisms within the ipTIME NAS and IP Camera communication protocols. Organizations should ensure that all cookie values and header data are properly validated before being passed to system commands. The recommended approach includes implementing strict input filtering, using parameterized commands instead of direct string concatenation, and applying principle of least privilege for network services. Additionally, network segmentation should be implemented to isolate these devices from critical network segments, and regular firmware updates should be deployed to address known vulnerabilities. This vulnerability aligns with ATT&CK technique T1059.007 for command and scripting interpreter and T1068 for exploit for privilege escalation, emphasizing the need for comprehensive defensive measures.