CVE-2005-3380 in Titanium 2005
Summary
by MITRE
Multiple interpretation error in Panda Titanium 2005 4.02.01 allows remote attackers to bypass virus scanning via a file such as BAT, HTML, and EML with an "MZ" magic byte sequence which is normally associated with EXE, which causes the file to be treated as a safe type that could still be executed as a dangerous file type by applications on the end system, as demonstrated by a "triple headed" program that contains EXE, EML, and HTML content, aka the "magic byte bug."
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Analysis
by VulDB Data Team • 07/27/2017
The vulnerability identified as CVE-2005-3380 represents a critical interpretation error within Panda Titanium 2005 version 4.02.01 that fundamentally undermines the security posture of the antivirus solution. This flaw stems from the software's improper handling of file type detection based on magic byte sequences, specifically the "MZ" signature that traditionally identifies executable files. The vulnerability allows malicious actors to craft files that appear benign to the antivirus scanner while retaining executable capabilities, creating a dangerous misclassification that bypasses security controls.
The technical implementation of this vulnerability exploits the core assumption that magic bytes serve as reliable indicators of file type and danger level. When a file contains the "MZ" magic byte sequence, the Panda Titanium scanner incorrectly categorizes it as a safe file type rather than recognizing it as a potential executable threat. This misclassification occurs because the software's file interpretation logic does not properly validate the complete file structure or content, instead relying on superficial magic byte matching. Attackers can leverage this by creating compound files that contain multiple file types in a single container, specifically positioning the "MZ" signature at the beginning to trigger the false positive safe classification.
The operational impact of this vulnerability extends far beyond simple bypass of antivirus protection, creating a sophisticated attack vector that can be exploited across multiple file formats including batch files, html documents, and email messages. The "triple headed" program demonstration shows how attackers can combine executable content with document formats to create files that appear harmless to security scanners but retain full execution capabilities on target systems. This approach directly violates the principle of least privilege and trust boundary enforcement that antivirus solutions are designed to maintain. The vulnerability enables code execution attacks that can escalate privileges, establish persistence mechanisms, and potentially compromise entire systems.
This vulnerability aligns with CWE-1064, which addresses the weakness of improper handling of file type detection, and demonstrates characteristics consistent with ATT&CK technique T1059.007 for command and scripting interpreter. The attack pattern follows the typical methodology of fileless malware delivery where the malicious payload is embedded within seemingly safe file formats. Security professionals should recognize this as a prime example of how heuristic and signature-based detection systems can be circumvented through careful manipulation of file metadata and structure. The vulnerability also relates to CWE-254, addressing weaknesses in file handling and validation that can lead to privilege escalation and code execution.
Mitigation strategies should focus on implementing comprehensive file validation mechanisms that go beyond simple magic byte checking and incorporate full file structure analysis. Organizations should deploy multiple layers of security controls including network monitoring, endpoint detection and response systems, and regular security updates to prevent exploitation of this class of vulnerability. The incident highlights the importance of thorough testing of security solutions against adversarial file construction techniques and emphasizes the need for robust file type validation that considers the complete file content rather than relying solely on initial byte sequences. Regular security assessments should include testing for similar interpretation errors that could allow attackers to bypass security controls through file format manipulation.