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Rating: Highly critical
Impact: System access
Where: From remote
"A software to view and convert graphic files, really simple to use!"
"Come to discover NConvert, a batch utility to convert graphic files!"
"GFL SDK is a free library (used by XnView) for developers who would like to support graphics image formats easily."
Secunia Research has discovered a vulnerability in XnView, NConvert, and GFL SDK, which can be exploited by malicious people to compromise a user's system.
The vulnerability is caused due to a boundary error when processing the "format" keyword of Sun TAAC files. This can be exploited to cause a stack-based buffer overflow by e.g. tricking a user into viewing a specially crafted Sun TAAC file.
Successful exploitation allows execution of arbitrary code.
The vulnerability is confirmed in version 1.70 of XnView for Linux and FreeBSD, XnView 1.93.6 for Windows, GFL SDK 2.82, and NConvert 4.92. Other versions may also be affected.
The vulnerability is fixed in version 1.94 beta1.
NConvert and GFL SDK:
A fixed version is not currently available. Do not open untrusted Sun TAAC files.
Discovered by Stefan Cornelius, Secunia Research.
The Common Vulnerabilities and Exposures (CVE) project has assigned CVE-2008-2427 for the vulnerability.
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