CVE-2008-3439 in Speedbit Video Accelerator
Summary
by MITRE
SpeedBit Video Acceleration before 2.2.1.8 does not properly verify the authenticity of updates, which allows man-in-the-middle attackers to execute arbitrary code via a Trojan horse update, as demonstrated by evilgrade and DNS cache poisoning.
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Analysis
by VulDB Data Team • 11/22/2017
The vulnerability identified as CVE-2008-3439 affects SpeedBit Video Acceleration software versions prior to 2.2.1.8, representing a critical security flaw in the update verification mechanism. This issue stems from the software's inadequate implementation of cryptographic verification processes for software updates, creating a pathway for malicious actors to compromise the integrity of the update system. The flaw specifically manifests in the absence of proper digital signature validation and certificate chain verification, which are fundamental security measures required to ensure that updates originate from legitimate sources. The vulnerability operates at the intersection of software integrity and network security, where attackers can exploit the trust relationship between the client software and update servers to inject malicious code into the target system.
The technical implementation of this vulnerability enables attackers to perform man-in-the-middle attacks against the update process by intercepting and modifying update traffic between the SpeedBit client and its update servers. This attack vector leverages the absence of robust cryptographic verification mechanisms that should validate the authenticity and integrity of downloaded updates. When users attempt to update their SpeedBit Video Acceleration software, the malicious update can be seamlessly injected into the update stream, bypassing all security checks that would normally prevent unauthorized modifications. The vulnerability's exploitation is particularly dangerous because it can be executed through common attack techniques such as DNS cache poisoning, which redirects update requests to attacker-controlled servers, or through evilgrade attacks that specifically target update mechanisms in software applications. This weakness directly corresponds to CWE-310, which addresses cryptographic issues in software systems, particularly those involving the lack of proper validation of digital signatures and certificates.
The operational impact of CVE-2008-3439 extends beyond simple code execution, creating a persistent threat vector that can be exploited for broader system compromise and data exfiltration. Once an attacker successfully injects malicious code through the update mechanism, they can establish persistent access to the compromised system, potentially elevating privileges and creating backdoors for continued unauthorized access. The vulnerability's severity is amplified by its ability to leverage existing network infrastructure weaknesses, making it particularly challenging to detect and prevent. Attackers can craft updates that appear legitimate to the user interface while containing malicious payloads designed to escalate privileges, install rootkits, or establish command and control communications. This vulnerability directly maps to several ATT&CK techniques including T1027 for obfuscated files and information, T1105 for remote file access, and T1059 for command and scripting interpreters, demonstrating how the initial compromise through update manipulation can lead to comprehensive system compromise. The attack can be executed without requiring direct user interaction beyond the normal update process, making it particularly stealthy and effective against users who regularly update their software.
Mitigation strategies for CVE-2008-3439 should prioritize immediate software updates to version 2.2.1.8 or later, which contain the necessary cryptographic verification enhancements. Organizations should implement network-level protections including DNS filtering, network segmentation, and monitoring for unusual update traffic patterns that could indicate compromise. The implementation of certificate pinning and robust digital signature validation should be enforced across all software update mechanisms to prevent similar vulnerabilities. Additionally, security teams should conduct regular vulnerability assessments targeting update mechanisms in all software applications to identify potential weaknesses in cryptographic implementation. Network administrators should deploy intrusion detection systems capable of monitoring for DNS cache poisoning attempts and other network-level attacks that could exploit this vulnerability. The remediation process should also include user education about the importance of verifying software integrity and understanding the risks associated with untrusted update sources. Organizations should establish robust software inventory management processes to ensure timely patch deployment and maintain visibility into all installed software versions that could be vulnerable to similar cryptographic weaknesses.