[NT] Quake 2 Server Format String (Lithium II)

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  Quake 2 Server Format String (Lithium II)
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SUMMARY

" <http://www.planetquake.com/lithium/> Lithium II is a very configurable 
server-side deathmatch modification for Quake II." By crafting a special 
nick name it is possible to cause a format string attack under Quake 2 
Lithium.

DETAILS

Vulnerable Systems:
 * Quake 2 Lithium II version 1.2

Quake 2 Lithium does not not filter the nick name that users selects for 
themselves. Creating a nick name such as %999f%f%f%f%f allow real number 
to overflow their range and cause a carry flag.

The format string is entered to the stuck as following:
004144A1 |. 68 E821AF00 PUSH QUAKE2.00AF21E8 ;
ASCII "0.000000 0.000000 0.000000"

The format string takes place when a user is been killed, and the server 
caused an invalid page fault in module <unknown> at 0000:3030302e.


ADDITIONAL INFORMATION

The information has been provided by  <mailto:[email protected]> 
sinNULL.



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