CVE-2023-32349 : Exploit Details and Defense Strategies

Teltonika's RUT model routers with firmware version 00.07.03.4 and prior are vulnerable to a security issue that could allow an authenticated attacker to execute arbitrary code. Find out more about CVE-2023-32349, its impact, technical details, and mitigation steps.

Understanding CVE-2023-32349

Teltonika's RUT router firmware versions prior to 00.07.03.4 are at risk due to improper validation of filter parameters in a packet dump utility, which could lead to arbitrary code execution.

What is CVE-2023-32349?

CVE-2023-32349 is a vulnerability in Teltonika's RUT model routers running firmware version 00.07.03.4 and earlier. The issue arises from improper handling of variables used for validation checks in the packet dump utility.

The Impact of CVE-2023-32349

The vulnerability could be exploited by an authenticated attacker to manipulate parameters in the dump utility through an exposed UCI configuration utility. This could potentially result in arbitrary code execution with high impacts on confidentiality, integrity, and availability.

Technical Details of CVE-2023-32349

The vulnerability is classified with a CVSS v3.1 base score of 8, indicating a high severity issue with low attack complexity and privileges required. The attack vector is through an adjacent network, and the impact on availability, confidentiality, and integrity is rated as high. The specific CWE related to the vulnerability is CWE-15: External Control of System or Configuration Setting.

Vulnerability Description

Teltonika's RUT router firmware versions prior to 00.07.03.4 contain a packet dump utility that lacks proper validation for filter parameters, allowing an attacker to manipulate variables through an external configuration file.

Affected Systems and Versions

Teltonika's RUT model routers with firmware version 00.07.03.4 and below are affected by this vulnerability.

Exploitation Mechanism

An attacker with authenticated access could exploit the vulnerability by modifying variables in the dump utility via the UCI configuration utility to execute arbitrary code.

Mitigation and Prevention

To mitigate the risks associated with CVE-2023-32349, it is crucial to take immediate actions and implement long-term security practices.

Immediate Steps to Take

Update the firmware of Teltonika RUT routers to versions beyond 00.07.03.4 to address the vulnerability. Restrict access to the UCI configuration utility to authorized personnel only.

Long-Term Security Practices

Regularly monitor security advisories from Teltonika and apply patches promptly. Conduct regular security assessments and penetration testing to identify and remediate vulnerabilities.

Patching and Updates

Teltonika has released patches to address the vulnerability. Ensure all routers are updated to the latest firmware version to protect against potential exploits.