|
Message-ID: <20081103153743.GJ18126@ngolde.de>
Date: Mon, 3 Nov 2008 16:37:43 +0100
From: Nico Golde <oss-security+ml@...lde.de>
To: oss-security@...ts.openwall.com
Cc: coley@...re.org
Subject: Re: CVE request - uw-imap
Hi,
* Nico Golde <oss-security+ml@...lde.de> [2008-11-03 15:55]:
> * Tomas Hoger <thoger@...hat.com> [2008-11-03 15:38]:
> > uw-imap upstream released new version 2007d on friday, announcing it as
> > security update fixing some issues in dmail and tmail utilities:
> >
> > http://mailman2.u.washington.edu/pipermail/imap-uw/2008-October/002267.html
> > http://mailman2.u.washington.edu/pipermail/imap-uw/2008-October/002268.html
> >
> > Further digging into this, the issue seem to be a buffer overflow
> > (strcpy) when handling command line arguments (overlong mailbox
> > specification when utility is called with user+folder argument). This
> > can have security implications in the setups where tmail is installed
> > setuid root (according to the resources I found, that's required in
> > certain configurations; dmail is not expected to run under different
> > user), or when one of the utilities is configured as deliver agent in
> > the MTA.
>
> Patch attached.
Didn't notice that you have this patch in your bz.
There is also another code snippet in the diff:
diff -Nurad uw-imap-2007b~dfsg/src/c-client/smtp.c imap-2007d/src/c-client/smtp.c
--- uw-imap-2007b~dfsg/src/c-client/smtp.c 2008-01-28 23:55:14.000000000 +0100
+++ imap-2007d/src/c-client/smtp.c 2008-08-08 18:31:44.000000000 +0200
@@ -396,7 +396,8 @@
if (stream) { /* send "QUIT" */
if (stream->netstream) { /* do close actions if have netstream */
smtp_send (stream,"QUIT",NIL);
- net_close (stream->netstream);
+ if (stream->netstream) /* could have been closed during "QUIT" */
+ net_close (stream->netstream);
}
/* clean up */
if (stream->host) fs_give ((void **) &stream->host);
Looks like a null ptr dereference is possible here if smtp_send returns
smtp_fake (stream,"SMTP connection broken (command)");. Did anyone check the
security implications of this yet?
In the meantime the discoverer of this released an advisory:
http://www.bitsec.com/en/rad/bsa-081103.txt
Cheers
Nico
--
Nico Golde - http://www.ngolde.de - nion@...ber.ccc.de - GPG: 0x73647CFF
For security reasons, all text in this mail is double-rot13 encrypted.
Content of type "application/pgp-signature" skipped
Powered by blists - more mailing lists
Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.
Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.