CVE-2024-30583 identifies a stack-based buffer overflow vulnerability in the Tenda FH1202 router firmware version 1.2.0.14(408). The vulnerability resides in the handling of the mitInterface parameter within the fromAddressNat function. A stack overflow occurs when this parameter is improperly processed, potentially allowing an attacker to overwrite the stack and execute arbitrary code. The vulnerability is classified under CWE-121 (Stack-based Buffer Overflow), indicating that improper bounds checking or input validation leads to memory corruption. The CVSS v3.1 base score is 8.0, reflecting high severity due to the combination of low attack complexity, low privileges required (PR:L), no user interaction (UI:N), and high impact on confidentiality, integrity, and availability (C:H/I:H/A:H). The attack vector is adjacent network (AV:A), meaning the attacker must have access to the local network segment. Exploitation could allow an attacker to gain control over the router, manipulate network traffic, or disrupt network services. No patches or public exploits are currently available, but the vulnerability is publicly disclosed and documented in the CVE database as of March 28, 2024.

The impact of this vulnerability is significant for organizations using the Tenda FH1202 router, especially in environments where these devices serve as critical network infrastructure components. Exploitation could lead to full device compromise, allowing attackers to intercept, modify, or block network traffic, deploy malware, or pivot to other internal systems. This threatens confidentiality by exposing sensitive data, integrity by allowing unauthorized changes to network configurations or traffic, and availability by potentially causing denial of service. Given the router’s role in home and small business networks, exploitation could also facilitate broader attacks on connected devices. The requirement for adjacent network access limits remote exploitation but does not eliminate risk, especially in poorly segmented or unsecured networks. The absence of known exploits in the wild currently reduces immediate risk but does not preclude future attacks once exploit code becomes available.

To mitigate this vulnerability, organizations should implement the following specific measures: 1) Immediately restrict access to the router’s management interfaces by limiting connections to trusted IP addresses and disabling remote management if not required. 2) Segment the network to isolate the router and critical infrastructure from untrusted or guest networks, reducing the attack surface. 3) Monitor network traffic for unusual patterns or attempts to exploit the mitInterface parameter, using intrusion detection systems or network behavior analysis tools. 4) Regularly audit and update router firmware; although no patch is currently available, users should apply updates promptly once released by Tenda. 5) Employ network access controls such as MAC filtering and strong authentication to limit device access. 6) Educate network administrators about this vulnerability and encourage vigilance for suspicious activity. 7) Consider replacing affected devices with models from vendors with faster patch cycles or better security track records if immediate patching is not feasible.