The Puma 7 chipset, which is used in some modems and routers, has been found to have a security vulnerability that could allow attackers to remotely execute code on your devices. This vulnerability is caused by a buffer overflow in the processing of certain types of network traffic, specifically in the TCP implementation of the Puma 7 chipset.
A buffer overflow is a type of software vulnerability that occurs when a program or application attempts to store more data in a buffer (a temporary storage area) than it can hold. This can cause the data to overflow, or “spill over,” into adjacent memory locations that were not intended to hold that data.
As a result, the extra data can corrupt or overwrite important information, such as memory pointers or program instructions. This can cause the program to crash or behave unexpectedly, and in some cases, can also be used to execute arbitrary code or gain unauthorized access to a system.
Buffer overflow attacks are often used to exploit vulnerabilities in software and can be used to take control of a system, steal sensitive information, or launch other types of attacks.
The vulnerability can be exploited by an attacker who can send a specially crafted packet to the affected device, allowing them to execute arbitrary code with root privileges. This could potentially allow an attacker to take control of the device, access sensitive information, or use it as a launchpad for further attacks on the network.
As a result of this vulnerability, some internet service providers, or ISPs have issued firmware updates to address the issue and fix the vulnerability on the affected devices. It is important to ensure that any modem or router using the Puma 7 chipset is updated with the latest firmware to protect against this vulnerability.
There is not a definitive list of modems and routers that were affected as some have new updated firmware now that fixes the vulnerability. You can check with your internet service provider before ordering your devices to ensure your system won’t become vulnerable from your new equipment.