The fbgs framebuffer Postscript/PDF viewer in fbi before 2.01 has a typo that prevents a filter from working correctly, which allows user-assisted attackers to bypass the filter and execute malicious Postscript commands.

The fbgs framebuffer Postscript/PDF viewer in fbi before 2.01 has a typo that prevents a filter from working correctly, which allows user-assisted attackers to bypass the filter and execute malicious Postscript commands.