full-disclosure - fingerprinting windows via 135/tcp

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From: sq5bpf at andra.com.pl (Jacek Lipkowski)
Subject: fingerprinting windows via 135/tcp

Hello,

I've been looking for a way to fingerprint windows systems via 135/tcp.
There are some differences in responses to invalid rpc request - it seems
that different windows versions treat the Assoc group field differently.
Usign this one can tell apart NT, 2000 and XP/2003.

I've enclosed a simple library to check the windows version, and see if it
is vulnerable to the DCOM/RPC exploit (code ripped from dcom_scanz.c by
kid and farp of buildtheb0x.com). There is also a simple program to
demonstrate the library, and a dcom/rpc exploit patched to autodetect the
target operating system.

Since i have no knowledge about dcom/rpc i wanted to ask if there is a
simpler way to do it? Maybe some call that would just return the version
directly?

jacek

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