Fortinet Discovers Apple QuickTime Picture Viewer Vulnerability
Fortinet's FortiGuard Labs has discovered a DLL loading vulnerability in Apple QuickTime Picture Viewer.
SolutionsUsers should apply the solution provided by Apple.
FortiGuard Labs has posted a blog post and document that recommends further mitigation strategy for this vulnerability.
Additional InformationApple QuickTime Picture Viewer pre-loads 3 DLLs: "CoreVideo.dll", "CoreGraphics.dll", and/or "CoreAudioToolbox.dll".
Double-clicking on a ".pic" file will call Apple QuickTime Picture Viewer to process the ".pic" file. Using the example "CoreVideo.dll", an attacker may plant any ".pic" file along with a malicious "CoreVideo.dll" DLL in the same directory on a victim's machine. Once the ".pic" file is executed, the malicious "CoreVideo.dll" library will be called before the one supplied by Apple due to the standard search order. To locate this DLL file, Picture Viewer adds a corresponding path to the PATH environment variable, which is preempted by the current working directory when the system searches for the DLL.
Haifei Li of Fortinet's FortiGuard Labs