CC:Mail password vulnerability

Description:CC:Mail stores cleartext passwords in a "hidden" batch file which is apparently read/writeable by all users on NT (and of course is on W95)
Author:Carl Byington <>
Compromise:Take over a CC:Mail postoffice
Vulnerable Systems:Windoze NT/95 running cc:Mail release 8
Date:8 September 1997

Date: Mon, 8 Sep 1997 13:17:04 -0500
From: Aleph One <aleph1@DFW.NET>
Subject: Password unsecurity in cc:Mail release 8

Forwarded from RISKS DIGEST 19.37

Date: Fri, 05 Sep 1997 15:51:21 -0700
From: Carl Byington <>
Subject: Password unsecurity in cc:Mail release 8

After installing a cc:Mail release 8 postoffice (and link to smtp) on an
NT3.51 machine, I noticed that the nightly reclaim process is scheduled via
the standard NT "at" command which runs %systemroot%\~callmnt.bat.  This
batch file simply runs yet another batch file %systemroot%\~ccmaint.bat.
Why do this?  Because the second batch file is "hidden", but a simple
"attrib" command removes that "protection", and then your master postoffice
password is nicely visible.

But you might ask, what are the NT security permissions on these batch
files?  Simply "everyone full control".  Oh well, at least I don't need to
worry about forgetting that password.

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