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DivX Player Skin Directory Traversal
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SUMMARY
As the name suggests, <http://www.divx.com/divx/player/> DivX Player is
"a Windows player for DivX files. It is included by default in the DivX
codec distributed by DivXNetworks".
Due to improper filtering by the DivX Player skin installer, an attacker
can cause DivX Player to overwrite arbitrary files by utilizing a
directory traversal vulnerability.
DETAILS
Vulnerable Systems:
* DivX Player version 2.6 and prior
The skins used by DivX Player are actually zip files containing all the
needed images and a script file. When the player loads a skin, it unpacks
the skin in the temporary system directory into a folder folder named with
the DPS's name.
An attacker can overwrite the files on the victim's disk in that is
located the temporary folder (usually c:) using the classical directory
traversal path like:
..\..\..\..\windows\notepad.exe
Can be used both slash and backslash.
Proof of concept:
A proof of concept can be downloaded from:
<http://aluigi.altervista.org/poc/divxplayerbug.dps>
http://aluigi.altervista.org/poc/divxplayerbug.dps
ADDITIONAL INFORMATION
The information has been provided by <mailto:aluigi@autistici.org> Luigi
Auriemma.
The original article can be found at:
<http://aluigi.altervista.org/adv/divxplayer-adv.txt>
http://aluigi.altervista.org/adv/divxplayer-adv.txt
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