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Re: CVE Request (minor) -- mc: Improper sanitization of MC_EXT_SELECTED variable when viewing multiple files
From: Kurt Seifried <kseifried () redhat com>
Date: Wed, 03 Oct 2012 10:16:55 -0600

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On 10/03/2012 09:36 AM, Jan Lieskovsky wrote:
Hello Kurt, Steve, vendors,

based on https://bugs.gentoo.org/show_bug.cgi?id=436518:

A security flaw was found in the way Midnight Commander, a
user-friendly text console file manager and visual shell, performed
sanitization of MC_EXT_SELECTED environment variable when multiple
files were selected (first selected file was used as actual content
of the MC_EXT_SELECTED variable, while the remaining files were 
provided as arguments to the temporary script, handling the F3 /
Enter key press event). A remote attacker could provide a
specially-crafted archive that, when expanded and previewed by the
victim could lead to arbitrary code execution with the privileges
of the user running mc executable.

References: [1] https://bugs.gentoo.org/show_bug.cgi?id=436518

Upstream ticket: [2]
https://www.midnight-commander.org/ticket/2913

I need to confess this one is a bit on the border (the attack to
succeed the victim would need to perform couple of steps), but
basically the scenario is possible.

Could you allocate a CVE id for this one?

Thank you && Regards, Jan. -- Jan iankko Lieskovsky / Red Hat
Security Response Team


Please use CVE-2012-4463 for this issue.

- -- 
Kurt Seifried Red Hat Security Response Team (SRT)
PGP: 0x5E267993 A90B F995 7350 148F 66BF 7554 160D 4553 5E26 7993

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