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021829.html

021829.html
Posted May 24, 2004
Authored by Rosalina Hamar

Variant vulnerabilities have been disclosed regarding the flaw in Mac OS X where code can be silently delivered via the disk URI handler vulnerability.

tags | advisory, vulnerability
systems | apple, osx
MD5 | d2862999845ac4b29764dced862fcb3c

021829.html

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<H1>[Full-Disclosure] Exploit different
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<B>Rosalina Hamar
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<I>Sat, 22 May 2004 19:42:36 +0800</I>
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<PRE>Apple released a fix for the Help Viewer Problem described by lixlpixel.
But during different tests some really serious problems turned out.

1) MacOS X LaunchService Vunerability
Mount a FTP/DAV/SMB/AFS-Volume with an application in it
which registers a new protocol handler i.e. test:, and if that
handler is called, the script will be executed.

Example from Info.plist:
[...]
<key>CFBundleURLTypes</key>
<array>
<dict>
<key>CFBundleURLName</key>
<string>Test</string>
<key>CFBundleURLSchemes</key>
<array>
<string>test</string>
</array>
</dict>
</array>
[...]

Demo: <A HREF="http://rosa.base-industries.net/">http://rosa.base-industries.net/</A>
More Infos:
-<A HREF="http://www.unsanity.com/haxies/pa/whitepaper">http://www.unsanity.com/haxies/pa/whitepaper</A>
- <A HREF="http://forums.macnn.com/showthread.php?s=&threadid=213043&perpage=50&pagenumber=1">http://forums.macnn.com/showthread.php?s=&threadid=213043&perpage=50&pagenumber=1</A>

2) Telnet URI Handler File Creation/Truncation Vulnerability
It is possible to wipe/zeroing a file using a telnet URI.

Example: <A HREF="telnet://-nlibrary%2Fpreferences%2Fcom.apple.finder.plist">telnet://-nlibrary%2Fpreferences%2Fcom.apple.finder.plist</A>

This effects all browsers which are passing telnet URIs back the
LaunchServices (thanks to fukami to make this clear to me).

More Infos: <A HREF="http://daringfireball.net/2004/05/telnet_protocol">http://daringfireball.net/2004/05/telnet_protocol</A>

Jason Harris from Unsanity provided a haxie called Paranoid Android
which pops up when a weird protocol handler is called.
PA can be found here: <A HREF="http://www.unsanity.com/haxies/pa/">http://www.unsanity.com/haxies/pa/</A>


"Even the exploits are user friendly" (mcgroarty on slashdot)

Rosa

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