CVE-2024-30622 in FH1205
Summary
by MITRE • 03/29/2024
Tenda FH1205 v2.0.0.7(775) has a stack overflow vulnerability in the mitInterface parameter from fromAddressNat function.
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Analysis
by VulDB Data Team • 08/13/2024
The vulnerability identified as CVE-2024-30622 affects the Tenda FH1205 wireless router firmware version 2.0.0.7(775) and represents a critical stack overflow condition within the device's network management interface. This flaw manifests specifically within the mitInterface parameter of the fromAddressNat function, creating a potential pathway for remote code execution and system compromise. The stack overflow vulnerability arises from inadequate input validation and bounds checking mechanisms within the firmware's handling of network interface parameters. Such vulnerabilities are particularly dangerous because they can be exploited by remote attackers without requiring authentication or physical access to the device, making them attractive targets for widespread exploitation campaigns.
The technical implementation of this vulnerability stems from improper memory management practices within the router's firmware codebase, specifically in how the fromAddressNat function processes the mitInterface parameter. When an attacker crafts malicious input parameters that exceed the allocated stack buffer size, the overflow can overwrite adjacent memory locations including return addresses and function pointers. This memory corruption can potentially allow an attacker to execute arbitrary code with the privileges of the affected process, typically corresponding to the router's administrative interface. The vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and represents a classic example of unsafe string handling in embedded systems where memory constraints and resource limitations often lead to insufficient input validation.
The operational impact of this vulnerability extends beyond simple denial of service conditions, as it provides attackers with the capability to gain full administrative control over the affected router. Once exploited, the attacker could modify network configurations, redirect traffic through malicious proxies, establish backdoors for persistent access, or use the compromised device as a launch point for further attacks within the local network. The vulnerability affects the router's NAT functionality and network address translation capabilities, potentially enabling attackers to bypass network security controls or perform man-in-the-middle attacks against connected devices. This represents a significant risk for home and small office networks where these devices often serve as the primary gateway to the internet and may not be properly monitored or updated.
Mitigation strategies for CVE-2024-30622 should include immediate firmware updates from Tenda, if available, and network segmentation to limit the potential impact of exploitation. Organizations should implement network monitoring to detect anomalous traffic patterns that might indicate exploitation attempts, particularly focusing on unusual NAT rule modifications or unexpected network behavior. The vulnerability demonstrates the importance of secure coding practices in embedded systems and aligns with ATT&CK technique T1059.007 for command and scripting interpreter, as successful exploitation would likely involve executing malicious commands through the compromised router interface. Network administrators should also consider implementing intrusion detection systems that can identify and alert on suspicious parameter values being passed to network management interfaces. Additionally, the vulnerability highlights the need for regular security assessments of network infrastructure devices and the importance of maintaining current firmware versions to protect against known vulnerabilities.