CVE-2008-0069 in XnView
Summary
by MITRE
Stack-based buffer overflow in XnView 1.92 and 1.92.1 allows user-assisted remote attackers to execute arbitrary code via a long FontName parameter in a slideshow (.sld) file, a different vector than CVE-2008-1461.
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Analysis
by VulDB Data Team • 10/20/2024
The vulnerability identified as CVE-2008-0069 represents a critical stack-based buffer overflow flaw discovered in XnView version 1.92 and 1.92.1 software applications. This vulnerability specifically targets the handling of FontName parameters within slideshow (.sld) files, creating a user-assisted remote execution vector that enables attackers to potentially gain unauthorized code execution privileges on affected systems. The flaw demonstrates particular significance as it operates through a distinct attack pathway compared to the closely related CVE-2008-1461 vulnerability, indicating a separate but equally dangerous exploitation method within the same software ecosystem.
The technical implementation of this vulnerability stems from inadequate input validation and memory management within the XnView application's slideshow file parser. When processing .sld files containing excessively long FontName parameters, the software fails to properly bounds-check the input data before copying it into a fixed-size stack buffer. This fundamental programming error creates a condition where attacker-controlled data can overwrite adjacent memory locations, potentially corrupting the stack frame and allowing for arbitrary code execution. The buffer overflow occurs during the slideshow presentation process when the application attempts to render text elements using the malicious FontName parameter, making this a particularly insidious vulnerability given XnView's widespread use for image and media presentation tasks.
The operational impact of CVE-2008-0069 extends beyond simple code execution capabilities, as it provides attackers with a mechanism to compromise systems through seemingly benign media presentation files. This user-assisted remote attack vector means that victims need only open a malicious .sld file, often delivered through social engineering campaigns or compromised websites, to potentially expose their systems to full compromise. The vulnerability affects systems running the affected XnView versions across multiple operating environments, creating widespread exposure given the software's popularity in both personal and professional settings. Security professionals should note that this vulnerability aligns with CWE-121 stack-based buffer overflow conditions and represents a classic example of how multimedia applications can become attack vectors through improper input handling.
Organizations and individuals utilizing XnView software should immediately implement mitigations including software updates to versions that address this vulnerability, as well as network-based restrictions on .sld file execution. The recommended approach involves comprehensive patch management procedures to ensure all affected systems receive the necessary security updates from the vendor. Additionally, security teams should consider implementing file type restrictions and content filtering mechanisms to prevent automatic execution of potentially malicious slideshow files. This vulnerability demonstrates the importance of input validation and memory safety practices in multimedia applications, aligning with ATT&CK technique T1059.007 for execution through scripting and T1203 for exploitation of software vulnerabilities. Organizations should also conduct security awareness training to help users recognize potentially malicious file attachments and understand the risks associated with opening untrusted media presentation files. The vulnerability serves as a reminder of the critical need for robust software security practices and the potential consequences of inadequate input validation in applications handling user-supplied data.