CVE-2006-6860 in MythControl
Summary
by MITRE
Buffer overflow in the sendToMythTV function in MythControlServer.c in MythControl 1.0 and earlier allows remote attackers to execute arbitrary code via a crafted sendStr string to the Bluetooth interface. NOTE: some of these details are obtained from third party information.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 08/12/2018
The vulnerability identified as CVE-2006-6860 represents a critical buffer overflow flaw within the MythControl 1.0 software suite, specifically within the MythControlServer.c source file. This vulnerability manifests in the sendToMythTV function which processes incoming data through the Bluetooth interface, creating a pathway for remote code execution. The flaw stems from inadequate input validation and bounds checking mechanisms that fail to properly handle maliciously crafted payload data. The vulnerability affects all versions of MythControl up to and including version 1.0, making it a significant concern for systems deployed in environments where Bluetooth communication is utilized for control purposes.
The technical implementation of this buffer overflow occurs when the sendToMythTV function receives a crafted sendStr string through the Bluetooth interface without proper sanitization or length verification. This function likely employs fixed-size buffers to store incoming data, and when the incoming payload exceeds these predetermined limits, the excess data overflows into adjacent memory regions. This overflow can overwrite critical program variables, return addresses, or function pointers, potentially allowing an attacker to manipulate the program execution flow. The vulnerability is particularly concerning because it operates over a network interface, specifically Bluetooth, enabling remote exploitation without requiring physical access to the target system. The flaw aligns with CWE-121, which describes heap-based buffer overflow conditions, and represents a classic example of improper input validation that can lead to arbitrary code execution.
The operational impact of this vulnerability extends beyond simple remote code execution, as it fundamentally compromises the integrity and confidentiality of systems running affected MythControl versions. Attackers can leverage this vulnerability to gain unauthorized access to control systems, potentially manipulating or disrupting services managed by MythControl. The Bluetooth interface presents additional attack surface considerations, as wireless communication channels are inherently more susceptible to interception and exploitation compared to wired connections. Systems utilizing this software for home automation, entertainment control, or other critical functions become vulnerable to unauthorized manipulation, potentially leading to data breaches, service disruption, or even physical security implications depending on the environment. The vulnerability also demonstrates poor secure coding practices that violate fundamental principles of defensive programming and input validation.
Mitigation strategies for CVE-2006-6860 must address both immediate remediation and long-term architectural improvements. The primary solution involves upgrading to a patched version of MythControl that implements proper bounds checking and input validation mechanisms. Organizations should also implement network segmentation and access controls to limit Bluetooth interface exposure, particularly in environments where the software operates. Network monitoring and intrusion detection systems should be configured to detect anomalous Bluetooth traffic patterns that might indicate exploitation attempts. Additionally, implementing proper code review processes and secure coding standards can prevent similar vulnerabilities from emerging in future development cycles. The ATT&CK framework categorizes this vulnerability under T1203, which covers Exploitation for Client Execution, emphasizing the need for both endpoint protection and network-based detection measures to effectively defend against such attacks.