CVE-2023-38939 : Exploit Details and Defense Strategies

This article provides detailed information about CVE-2023-38939, a vulnerability found in Tenda F1202 V1.2.0.9 and FH1202 V1.2.0.9 that leads to a stack overflow via the mit_ssid parameter in the formWrlsafeset function.

Understanding CVE-2023-38939

In this section, we will explore what CVE-2023-38939 entails and its impact on the affected systems.

What is CVE-2023-38939?

CVE-2023-38939 is a security flaw identified in Tenda F1202 V1.2.0.9 and FH1202 V1.2.0.9, allowing for a stack overflow through the mit_ssid parameter within the formWrlsafeset function.

The Impact of CVE-2023-38939

This vulnerability can potentially be exploited by malicious actors to execute arbitrary code or trigger a denial of service (DoS) attack on the affected systems.

Technical Details of CVE-2023-38939

In this section, we will delve into the specifics of the vulnerability, the systems it affects, and how it can be exploited.

Vulnerability Description

The stack overflow vulnerability in Tenda F1202 and FH1202 arises from improper input validation of the mit_ssid parameter, which can be manipulated to trigger the overflow.

Affected Systems and Versions

Tenda F1202 V1.2.0.9 and FH1202 V1.2.0.9 are confirmed to be impacted by CVE-2023-38939, exposing devices running these versions to potential exploitation.

Exploitation Mechanism

By sending specially crafted input via the mit_ssid parameter to the formWrlsafeset function, threat actors can overwhelm the stack memory, leading to a buffer overflow condition.

Mitigation and Prevention

To protect systems from CVE-2023-38939, immediate steps need to be taken along with implementing long-term security measures and ensuring timely patching and updates.

Immediate Steps to Take

It is crucial to disable any remote access to the affected devices and apply vendor-supplied patches or mitigations as soon as they are available.

Long-Term Security Practices

Regularly updating firmware, configuring devices securely, monitoring for suspicious activities, and conducting security assessments are essential for long-term protection against such vulnerabilities.

Patching and Updates

Stay informed about security advisories from Tenda and apply patches promptly to mitigate the risk posed by CVE-2023-38939.