bugtraq - uninitialized buffer in midnight commander

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Message-ID: <E1A0LbX-000NPk-00.alienhard-mail-ru@f9.mail.ru>
Date: Fri, 19 Sep 2003 17:47:23 +0400
From: "Ilya Teterin"  <alienhard@...l.ru>
To: bugtraq@...urityfocus.com
Subject: uninitialized buffer in midnight commander

Midnight Commander is using uninitialized buffer for handling symlinks in VFS (tar, cpio). See vfs/direntry.c, handling of buf[] at vfs_s_resolve_symlink(). I wonder but it works almost properly ;-)

On linux-i386 I can reach stack buffer overflow using specially crafted archive. Open http://buggzy.narod.ru/exp.tgz in mc's VFS to test (mc will crash).

Affected systems/vendors/archs: at least linux-i386, mc-4.5.52 to mc-4.6.0, too lazy to test others ;-)

P.S. Greetings to iDEFENSE VCP. I'm tired and hungry ;)