CVE-2023-35193 : Security Advisory and Response

This article provides an in-depth overview of CVE-2023-35193, an OS command injection vulnerability affecting Peplink Surf SOHO HW1 v6.3.5 (in QEMU).

Understanding CVE-2023-35193

CVE-2023-35193 is an OS command injection vulnerability that exists in the

api.cgi cmd.mvpn.x509.write

functionality of Peplink Surf SOHO HW1 v6.3.5 (in QEMU). This vulnerability allows an attacker to execute arbitrary commands by sending a specially crafted HTTP request.

What is CVE-2023-35193?

CVE-2023-35193 is a critical vulnerability in Peplink Surf SOHO HW1 v6.3.5 (in QEMU) that stems from improper neutralization of special elements used in an OS command, leading to command injection.

The Impact of CVE-2023-35193

The impact of CVE-2023-35193 is rated as HIGH. An attacker can exploit this vulnerability to execute malicious commands with elevated privileges, potentially compromising the confidentiality, integrity, and availability of the affected system.

Technical Details of CVE-2023-35193

Vulnerability Description

The vulnerability arises due to a flaw in the

system

call in the file

/web/MANGA/cgi-bin/api.cgi

for firmware version 6.3.5 at offset 0x4bddb8, allowing for unauthorized command execution.

Affected Systems and Versions

Vendor: Peplink
Product: Surf SOHO HW1
Affected Version: v6.3.5 (in QEMU)

Exploitation Mechanism

An attacker can exploit CVE-2023-35193 by sending a specially crafted HTTP request to the vulnerable

cmd.mvpn.x509.write

function, triggering the execution of arbitrary commands.

Mitigation and Prevention

Immediate Steps to Take

It is recommended to update the firmware to a non-vulnerable version and apply security patches provided by the vendor to mitigate the risk of exploitation.

Long-Term Security Practices

Implementing network segmentation, restricting access to sensitive functions, and monitoring for suspicious activities can help prevent future attacks leveraging CVE-2023-35193.

Patching and Updates

Regularly checking for firmware updates and security advisories from Peplink is crucial to ensure that the latest patches are applied promptly to address known vulnerabilities.