CVE-2007-6386 in Trend Micro Internet Security Pro
Summary
by MITRE
Stack-based buffer overflow in PccScan.dll before build 1451 in Trend Micro AntiVirus plus AntiSpyware 2008, Internet Security 2008, and Internet Security Pro 2008 allows user-assisted remote attackers to cause a denial of service (SfCtlCom.exe crash), and allows local users to gain privileges, via a malformed .zip archive with a long name, as demonstrated by a .zip file created via format string specifiers in a crafted .uue file.
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Analysis
by VulDB Data Team • 11/09/2017
The vulnerability described in CVE-2007-6386 represents a critical stack-based buffer overflow affecting Trend Micro AntiVirus plus AntiSpyware 2008 and related security products. This flaw exists within the PccScan.dll component, specifically in versions prior to build 1451, creating a significant security risk that can be exploited through carefully crafted malicious archive files. The vulnerability manifests when the software processes malformed .zip archives containing excessively long filenames, demonstrating how legacy security software can contain fundamental programming errors that compromise system integrity.
The technical implementation of this vulnerability stems from improper input validation within the PccScan.dll library responsible for scanning archive files. When processing a specially crafted .zip file with an extended filename, the software fails to properly bounds-check the buffer allocation, leading to a stack-based buffer overflow condition. This occurs because the application does not adequately validate the length of filenames within archive structures before copying them into fixed-size buffers on the stack. The vulnerability is particularly concerning as it can be triggered through format string specifiers contained within crafted .uue files, which when processed by the vulnerable software create the malicious payload that overflows the designated memory space.
The operational impact of this vulnerability extends beyond simple denial of service conditions to include potential privilege escalation for local attackers. Remote attackers can leverage this vulnerability to cause SfCtlCom.exe processes to crash, effectively creating a denial of service scenario that disrupts security services. However, the more serious implications arise from the local privilege escalation capability, which allows attackers who already have access to the system to potentially elevate their privileges to higher system levels. This dual nature of the vulnerability makes it particularly dangerous in enterprise environments where security software is often installed with elevated privileges and where local access might be gained through various attack vectors.
The exploitation of this vulnerability aligns with several ATT&CK framework techniques including privilege escalation through software exploitation and defense evasion via service disruption. From a CWE perspective, this represents a classic stack-based buffer overflow (CWE-121) that occurs due to insufficient bounds checking in memory management operations. The vulnerability also demonstrates poor input validation practices that are commonly associated with CWE-20, which covers weaknesses in input validation. Organizations affected by this vulnerability face significant risk as the exploit can be executed with minimal user interaction, potentially allowing attackers to gain unauthorized access to systems and compromise the security posture of entire networks.
Mitigation strategies for CVE-2007-6386 require immediate patching of affected Trend Micro products to build 1451 or later versions that contain proper buffer overflow protections. System administrators should also implement additional security controls including network segmentation, application whitelisting, and monitoring for unusual process behavior that might indicate exploitation attempts. Regular vulnerability assessments and penetration testing should be conducted to identify similar issues in other security software and system components. The vulnerability serves as a reminder of the importance of thorough code review processes and the need for robust input validation in security applications that handle untrusted data from external sources.