CVE-2024-7442: Vivotek SD9364 Firmware RCE Vulnerability

CVE-2024-7442 Overview

CVE-2024-7442 is a command injection vulnerability in the Vivotek SD9364 network camera running firmware version VVTK-0103f. The flaw resides in the getenv function call within upload_file.cgi, where the QUERY_STRING argument is passed to a shell context without proper sanitization. Remote attackers with low-level privileges can inject arbitrary operating system commands through crafted HTTP requests. Vivotek confirmed that the affected release tree is end-of-life and will not receive a security patch. The vulnerability is tracked under VulDB identifier VDB-273527 and maps to [CWE-77] Improper Neutralization of Special Elements used in a Command.

Critical Impact

Authenticated remote attackers can execute arbitrary shell commands on unsupported Vivotek SD9364 cameras through the QUERY_STRING parameter of upload_file.cgi, with no vendor patch available.

Affected Products

• Vivotek SD9364 hardware camera
• Vivotek SD9364 firmware version VVTK-0103f
• End-of-life Vivotek SD9364 release tree (no longer maintained)

Discovery Timeline

• 2024-08-03 - CVE-2024-7442 published to NVD
• 2024-08-06 - Last updated in NVD database

Technical Details for CVE-2024-7442

Vulnerability Analysis

The vulnerability exists in the upload_file.cgi binary shipped with the Vivotek SD9364 firmware VVTK-0103f. The CGI handler retrieves the HTTP request parameters using the getenv function against the QUERY_STRING environment variable. The retrieved string is then passed to a command interpreter without input validation or shell metacharacter escaping. An attacker who can reach the camera's web interface can append shell control characters such as semicolons, backticks, or pipes to inject arbitrary commands. Successful exploitation yields code execution under the privileges of the web server process, which on embedded camera firmware typically operates with elevated rights.

Root Cause

The root cause is improper neutralization of special characters in a CGI input handler [CWE-77]. The upload_file.cgi binary trusts the contents of the QUERY_STRING variable and concatenates it into a command string evaluated by the underlying shell. Embedded device firmware frequently relies on system(), popen(), or similar primitives that interpret shell metacharacters, making any unsanitized environment variable a direct injection sink.

Attack Vector

The attack is initiated remotely over the network against the camera's HTTP interface. The attacker submits a request to upload_file.cgi with a QUERY_STRING containing shell metacharacters followed by attacker-controlled commands. Because the affected firmware is end-of-life, no official patch will be released. Public technical analysis is available at the Notion Blog Vulnerability Analysis and the VulDB CTI ID #273527 entry.

Detection Methods for CVE-2024-7442

Indicators of Compromise

• HTTP requests to /upload_file.cgi containing shell metacharacters such as ;, |, `, $(, or && inside the query string.
• Unexpected outbound network connections originating from the camera's IP address to attacker-controlled hosts.
• Camera logs or proxy logs showing repeated requests to upload_file.cgi from a single external source.
• New or modified files in firmware-writable directories that did not originate from a legitimate firmware update.

Detection Strategies

• Inspect web proxy and firewall logs for requests targeting upload_file.cgi with non-standard query string characters.
• Deploy network signatures that flag URI parameters containing shell metacharacters destined for camera management interfaces.
• Baseline normal camera HTTP traffic and alert on deviations in request length, content, or frequency.

Monitoring Recommendations

• Place SD9364 cameras on a segmented VLAN and monitor egress traffic for connections to unknown destinations.
• Forward camera access logs to a centralized logging platform and alert on upload_file.cgi activity from non-administrative sources.
• Track firmware versions across the fleet and continuously flag devices still running VVTK-0103f.

How to Mitigate CVE-2024-7442

Immediate Actions Required

• Identify all Vivotek SD9364 cameras in the environment and confirm firmware versions.
• Remove or replace devices running the end-of-life VVTK-0103f firmware tree, since no patch is forthcoming.
• Block external access to camera HTTP interfaces at the perimeter firewall and restrict management access to a dedicated administrative network.

Patch Information

No patch is available. Vivotek confirmed that the affected release tree is end-of-life and will not receive security updates. Replacement with a supported camera model is the only vendor-backed remediation path. Refer to the VulDB #273527 entry for ongoing tracking.

Workarounds

• Isolate SD9364 cameras on an internal network segment with no inbound access from the internet or untrusted user networks.
• Restrict access to upload_file.cgi using an upstream reverse proxy or access control list that filters query strings containing shell metacharacters.
• Disable or change default credentials and enforce strong authentication on the camera web interface to reduce the population of low-privilege attackers who can reach the vulnerable endpoint.
• Plan migration to a vendor-supported camera model on a defined timeline.