CVE-2024-29366 in DIR-845L
Summary
by MITRE • 03/22/2024
A command injection vulnerability exists in the cgibin binary in DIR-845L router firmware <= v1.01KRb03.
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Analysis
by VulDB Data Team • 03/22/2024
The command injection vulnerability identified as CVE-2024-29366 resides within the cgi-bin binary component of the DIR-845L router firmware version 1.01KRb03 and earlier. This critical flaw represents a significant security risk for network infrastructure devices, as it allows remote attackers to execute arbitrary commands on the affected device with elevated privileges. The vulnerability stems from improper input validation within the web interface handling mechanisms that process user-supplied data through the cgi-bin interface, creating a pathway for malicious command execution.
The technical exploitation of this vulnerability occurs when the router's web interface fails to properly sanitize or validate user inputs that are subsequently passed to system commands. This improper input handling creates a classic command injection vector where attacker-controlled data can be interpreted and executed as shell commands by the underlying operating system. The flaw is categorized under CWE-77 as Command Injection, which specifically addresses situations where untrusted data is passed to system command execution functions without proper sanitization or validation.
Network attackers can leverage this vulnerability to gain unauthorized access to the router's underlying operating system, potentially leading to complete device compromise and unauthorized network access. The operational impact extends beyond simple command execution as it enables attackers to modify router configurations, establish persistent backdoors, or use the compromised device as a pivot point for further attacks within the local network. This vulnerability particularly affects enterprise and home network environments where these devices serve as critical network gateways, making the potential attack surface and impact significantly broader than initially apparent.
Security professionals should immediately implement network segmentation and access controls to limit exposure to this vulnerability. The recommended mitigation strategy includes updating the router firmware to the latest available version that addresses this specific command injection flaw, as well as implementing network monitoring to detect suspicious command execution patterns. Organizations should also consider deploying web application firewalls and network intrusion detection systems to identify and block potential exploitation attempts. According to ATT&CK framework, this vulnerability maps to T1059.001 Command and Scripting Interpreter with specific emphasis on T1566.001 Phishing: Spearphishing Attachment, as attackers may use social engineering to gain initial access before exploiting this command injection vulnerability. The remediation process should include comprehensive network scanning to identify all affected devices and systematic firmware updates across all network infrastructure components to ensure complete protection against this and similar command injection vulnerabilities.