Fedora Core 2: 2004-289 Critical: gtk2 Image Decoder Issues Explored

GTK+ is a multi-platform toolkit for creating graphical user

interfaces. Offering a complete set of widgets, GTK+ is suitable for

projects ranging from small one-off tools to complete application

suites.

During testing of a previously fixed flaw in Qt (CAN-2004-0691), a flaw was discovered in the BMP image processor of gtk2. An attacker could create a carefully crafted BMP file which would cause an application to enter an infinite loop and not respond to user input when the file was opened by a victim. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2004-0753 to this issue.

During a security audit Chris Evans discovered a stack and a heap overflow in the XPM image decoder. An attacker could create a carefully crafted XPM file which could cause an application linked with gtk2 to crash or possibly execute arbitrary code when the file was opened by a victim. (CAN-2004-0782, CAN-2004-0783)

Chris Evans also discovered an integer overflow in the ICO image decoder. An attacker could create a carefully crafted ICO file which could cause an application linked with gtk2 to crash when the file was opened by a victim. (CAN-2004-0788)

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