CVE-2023-36955 : What You Need to Know

A stack overflow vulnerability was discovered in TOTOLINK CP300+ <=V5.2cu.7594_B20200910, allowing attackers to execute arbitrary code via the File parameter in the UploadCustomModule function.

Understanding CVE-2023-36955

This CVE identifies a critical security flaw in TOTOLINK CP300+ devices that could potentially lead to unauthorized code execution.

What is CVE-2023-36955?

The CVE-2023-36955 vulnerability enables threat actors to trigger a stack overflow by manipulating the File parameter within the UploadCustomModule function of affected devices.

The Impact of CVE-2023-36955

Exploitation of this vulnerability could result in unauthorized execution of arbitrary code, potentially leading to full device compromise and unauthorized access to the system.

Technical Details of CVE-2023-36955

This section provides insight into the specific technical aspects of the CVE-2023-36955 vulnerability.

Vulnerability Description

The vulnerability arises due to inadequate input validation on the File parameter, allowing an attacker to overflow the stack and potentially execute malicious code on the target system.

Affected Systems and Versions

TOTOLINK CP300+ devices running firmware version <=V5.2cu.7594_B20200910 are susceptible to this security flaw.

Exploitation Mechanism

Threat actors can exploit this vulnerability by crafting a specific input for the File parameter, causing a stack overflow condition and leading to the execution of arbitrary code.

Mitigation and Prevention

To prevent potential exploitation of CVE-2023-36955, immediate action and long-term security practices are essential.

Immediate Steps to Take

Disable remote access to affected devices if not required.
Apply security patches provided by the vendor promptly.

Long-Term Security Practices

Regularly update firmware to ensure the latest security fixes are applied.
Implement network segmentation to contain potential attacks and limit their impact.

Patching and Updates

Vendor-supplied patches should be applied as soon as they are available to mitigate the CVE-2023-36955 vulnerability.