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Home arrow SecurityAlert Database

Arrow  Topic :

Windows XP IE8,7 HLP file vulnerability


Arrow  SecurityAlert : 7080
Arrow  CVE : CVE-2010-0483
Arrow  CVE : CVE-2010-0917
Arrow  CWE : CWE-94
Arrow  CWE : CWE-119
Arrow  SecurityRisk : High  Security Risk High  (About)
Arrow  Remote Exploit : Yes
Arrow  Local Exploit : No
Arrow  Victim interaction required : Yes
Arrow  Exploit Available : No
Arrow  Credit : Maurycy Prodeus
Arrow  Published : 06.03.2010

Arrow  Affected Software : microsoft:windows_2000::sp4
microsoft:windows_xp::sp2
microsoft:windows_xp::sp3
microsoft:windows_xp:-:sp2:x64
microsoft:windows_server_2003::sp2:x64
microsoft:windows_2003_server::sp2
microsoft:windows_2003_server::sp2:itanium



Arrow  Advisory Content :  

===[ ABSTRACT ]===
It is possible to invoke winhlp32.exe from Internet Explorer 8,7,6
using VBScript. Passing malicious .HLP file to winhlp32 could allow
remote attacker to run arbitrary command.
Additionally, there is a stack overflow vulnerability in winhlp32.exe.


===[ AFFECTED SOFTWARE ]===
Windows XP SP3

NOT AFFECTED: Vista, Windows 7

===[ DESCRIPTION ]===

To trigger vulnerability some user interaction is needed. Victim has to
press F1 when MsgBox popup is displayed.

Syntax of MsgBox function:

MsgBox(prompt[,buttons][,title][,helpfile,context])


It is possible to pass remote samba share as helpfile parameter.
In addition there is a stack based buffer overflow when helpfile
parameter is too long. However, on XP winhlp32.exe is compiled with
/GS flag, which in this case effectively guard the stack.

Proof-of-Concept is available here:
http://isec.pl/poc-isec27/

===[ IMPACT ]===
Score: MEDIUM

The vulnerability allows remote attacker to run arbitrary code on
victim machine.


===[ DISCLOSURE TIMELINE ]===
01 Feb 2007 The vulnerability was discovered.
26 Feb 2010 Public disclosure


===[ AUTHOR ]===
Maurycy Prodeus | twitter.com/mprodeus



Arrow  References :

http://xforce.iss.net/xforce/xfdb/56560
http://www.theregister.co.uk/2010/03/01/ie_code_execution_bug/
http://www.securityfocus.com/bid/38473
http://www.microsoft.com/technet/security/advisory/981169.mspx
http://isec.pl/vulnerabilities10.html
http://isec.pl/vulnerabilities/isec-0027-msgbox-helpfile-ie.txt
http://blogs.technet.com/msrc/archive/2010/03/01/security-advisory-981169-released.aspx




Arrow  Feedback :

If you have additional information or notice any errors regarding this security advisory, please use contact form or email us at info()securityreason()com.
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