CVE-2024-44550 in AX1806
Summary
by MITRE • 08/26/2024
Tenda AX1806 v1.0.0.1 contains a stack overflow via the adv.iptv.stbpvid parameter in the function formGetIptv.
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Analysis
by VulDB Data Team • 08/28/2024
The vulnerability identified as CVE-2024-44550 affects the Tenda AX1806 router firmware version 1.0.0.1, presenting a critical stack overflow condition that stems from improper input validation within the device's web interface. This flaw manifests specifically through the adv.iptv.stbpvid parameter when processed by the formGetIptv function, creating a potential avenue for remote code execution and system compromise. The vulnerability resides in the router's固件 implementation where user-supplied parameters are not adequately sanitized before being processed by the underlying C code, leading to memory corruption that can be exploited by malicious actors.
The technical nature of this vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations including return addresses and function pointers. The formGetIptv function in the Tenda router's web server component likely uses unsafe string handling functions such as strcpy or sprintf without proper length validation, allowing an attacker to supply a maliciously crafted adv.iptv.stbpvid parameter that exceeds the allocated stack buffer size. This overflow can potentially overwrite the instruction pointer or other critical control data, enabling arbitrary code execution with the privileges of the web server process, typically running with administrative privileges.
From an operational perspective, this vulnerability presents a severe risk to network security as it allows remote exploitation without authentication requirements, making it particularly dangerous for home and small office networks where such devices are commonly deployed. The attack surface is broad since the vulnerability exists in the web-based administration interface, which is typically accessible from external networks for device management purposes. Attackers could leverage this vulnerability to gain complete control over the router, potentially using it as a pivot point for further network infiltration, implementing man-in-the-middle attacks, or redirecting traffic through malicious proxies. The impact extends beyond simple device compromise as compromised routers can serve as persistent backdoors within networks, making detection and remediation particularly challenging.
Mitigation strategies for CVE-2024-44550 should prioritize immediate firmware updates from Tenda, as the vendor has likely released patches addressing this specific vulnerability. Network administrators should implement network segmentation to limit access to router management interfaces and consider disabling web-based administration when not actively required. The vulnerability also maps to ATT&CK technique T1071.004 for application layer protocol usage and T1566 for phishing with malicious attachments, as attackers may use compromised routers to establish persistent network access. Additionally, implementing proper input validation and bounds checking in the affected code would prevent such buffer overflow conditions, aligning with secure coding practices recommended by OWASP and NIST guidelines for embedded systems security. Organizations should also deploy network monitoring solutions to detect unusual traffic patterns that might indicate exploitation attempts targeting this vulnerability.