A security issue in Xdg-utils has been reported, which can be exploited by malicious people to compromise a user's system.
The problem is caused when Xdg-open is used in a mailcap file to open files with user preferred applications. This can be exploited to execute arbitrary commands on a user's system e.g. when a specially crafted .desktop file with a safe MIME type is sent to Firefox.
Successful exploitation requires that a system is configured to open certain MIME types with Xdg-open e.g. via a mailcap file.
NOTE: This may also be exploitable via other applications that use a mailcap file to open files.
Solution: Do not invoke Xdg-open via a mailcap file.
Provided and/or discovered by: Manuel Reimer
Original Advisory: https://bugs.freedesktop.org/show_bug.cgi?id=19377
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