Giovanni Delvecchio has discovered a security issue in Opera, which can be exploited by malicious people to compromise a user's system.
The problem is that a file with an unknown MIME type by default is handled by "kfmclient exec". This can be exploited to execute shell commands by tricking a user into opening a malicious shortcut/launcher containing an "Exec" entry.
Successful exploitation requires some user interaction.
The issue has been confirmed on Opera 7.54u1 for Linux. Other versions may also be affected.
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Subject: Opera Default Application "kfmclient exec" Security Issue
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