CVE-2024-51019 identifies a stack-based buffer overflow vulnerability in the Netgear R7000P router firmware version 1.3.3.154. The vulnerability resides in the handling of the pppoe_localnetmask parameter within the pppoe.cgi script, which processes PPPoE (Point-to-Point Protocol over Ethernet) configuration requests. An attacker with access to the router’s management interface or local network can send a specially crafted HTTP POST request targeting this parameter. Due to improper bounds checking, this crafted input causes a stack overflow, leading to memory corruption and ultimately a Denial of Service (DoS) condition by crashing or freezing the device. The CVSS v3.1 base score is 5.7, reflecting medium severity, with an attack vector classified as adjacent network (AV:A), low attack complexity (AC:L), requiring privileges (PR:L), no user interaction (UI:N), unchanged scope (S:U), and impact limited to availability (A:H). This vulnerability is categorized under CWE-120 (Classic Buffer Overflow). No patches or mitigations have been officially released yet, and no public exploits have been observed. The vulnerability does not allow for code execution or data compromise but can disrupt network availability, affecting connected users and services relying on the router.

The primary impact of CVE-2024-51019 is the disruption of network availability due to router crashes or freezes caused by the stack overflow. Organizations relying on the Netgear R7000P for critical network connectivity may experience service outages, impacting business operations, remote access, and internet connectivity. While the vulnerability does not expose sensitive data or allow unauthorized control, the resulting Denial of Service can degrade productivity and cause downtime. In environments where network uptime is critical, such as small to medium enterprises, branch offices, or home offices using this router, the impact can be significant. Additionally, repeated exploitation attempts could lead to persistent network instability. Since exploitation requires local or adjacent network access, attackers would likely need to be inside the network perimeter or have compromised a device within the LAN, limiting remote exploitation risk but increasing insider threat concerns.

To mitigate CVE-2024-51019, organizations should first verify if they are using the Netgear R7000P router with firmware version 1.3.3.154. Until an official patch is released, administrators should restrict access to the router’s management interface to trusted hosts only, preferably via network segmentation or firewall rules limiting access to the local network or specific management VLANs. Disable remote management features if enabled. Monitor network traffic for unusual POST requests targeting pppoe.cgi or abnormal router behavior indicative of attempted exploitation. Implement network intrusion detection systems (NIDS) with custom signatures to detect malformed PPPoE configuration requests. Regularly check Netgear’s security advisories for firmware updates addressing this vulnerability and apply patches promptly once available. As a longer-term measure, consider upgrading to newer router models or firmware versions with improved security posture. Educate network users about the risks of insider threats and enforce strong network access controls to minimize exposure.