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From: ma+bt@dt.e-technik.uni-dortmund.de
Date: Tue, 24 Jun 2008 14:34:57 +0100

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

fetchmail-SA-2008-01: Crash on large log messages in verbose mode

Topics:		Crash in large log messages in verbose mode.

Author:		Matthias Andree
Version:	1.2
Announced:	2008-06-17
Type:		Dereferencing garbage pointer triggered by outside circumstances
Impact:		denial of service possible
Danger:		low
CVSS V2 vector: (AV:N/AC:M/Au:N/C:N/I:N/A:C/E:P/RL:O/RC:C)

Credits:	Petr Uzel (fix), Petr Cerny (analysis), Gunter Nau (bug report)
CVE Name:	CVE-2008-2711
URL:		http://www.fetchmail.info/fetchmail-SA-2008-01.txt
Project URL:	http://www.fetchmail.info/

Affects:	fetchmail release before and excluding 6.3.9
		fetchmail release candidate 6.3.9-rc1

Not affected:	fetchmail release 6.3.9 and newer
		fetchmail release candidate 6.3.9-rc2 and newer
		systems without varargs support.

Corrected:	2008-06-24 fetchmail SVN (rev 5205)

References:	<https://bugzilla.novell.com/show_bug.cgi?id=354291>
		<http://developer.berlios.de/patch/?func=detailpatch&patch_id=2492&group_id=1824>


0. Release history
==================

2008-06-13 1.0	first draft for MITRE/CVE (visible in SVN,
		posted to oss-security)
2008-06-17 1.0	published on http://www.fetchmail.info/
2008-06-17 1.1	Corrected typo in Type: above (trigged -> triggered)
2008-06-24 1.2  also fixed issue in report_complete (reported by Petr Uzel)


1. Background
=============

fetchmail is a software package to retrieve mail from remote POP2, POP3,
IMAP, ETRN or ODMR servers and forward it to local SMTP, LMTP servers or
message delivery agents.

fetchmail ships with a graphical, Python/Tkinter based configuration
utility named "fetchmailconf" to help the user create configuration (run
control) files for fetchmail.


2. Problem description and Impact
=================================

Gunter Nau reported fetchmail crashing on some messages; further
debugging by Petr Uzel and Petr Cerny at Novell/SUSE Czech Republic
dug up that this happened when fetchmail was trying to print, in -v -v
verbose level, headers exceeding 2048 bytes. In this situation,
fetchmail would resize the buffer and fill in further parts of the
message, but forget to reinitialize its va_list typed source pointer,
thus reading data from a garbage address found on the stack at
addresses above the function arguments the caller passed in; usually
that would be the caller's stack frame.

It is unknown whether code can be injected remotely, but given that
the segmentation fault is caused by read accesses, the relevant data
is not under the remote attacker's control and no buffer overrun
situation is present that would allow altering program /flow/, it is
deemed rather unlikely that code can be injected.

Note that the required -vv configuration at hand is both non-default
and also not common in automated (cron job) setups, but usually used
in manual debugging, so not many systems would be affected by the
problem. Nonetheless, in vulnerable configurations, it is remotely
exploitable to effect a denial of service attack.



3. Solution
===========

There are two alternatives, either of them by itself is sufficient:

a. Apply the patch found in section B of this announcement to
   fetchmail 6.3.8, recompile and reinstall it.

b. Install fetchmail 6.3.9 or newer after it will have become available.
   The fetchmail source code is always available from
   <http://developer.berlios.de/project/showfiles.php?group_id=1824>.


4. Workaround
=============

Run fetchmail at low verbosity, avoid using two or three -v arguments;
internal messages are short and do not contain external message
sources so they do not cause buffer resizing. It is recommended to
replace the vulnerable code by a fixed version (see previous
section 3. Solution) as soon as reasonably possible.


A. Copyright, License and Warranty
==================================

(C) Copyright 2008 by Matthias Andree, <matthias.andree@gmx.de>.
Some rights reserved.

This work is licensed under the Creative Commons
Attribution-NonCommercial-NoDerivs German License. To view a copy of
this license, visit http://creativecommons.org/licenses/by-nc-nd/2.0/de/
or send a letter to Creative Commons; 559 Nathan Abbott Way;
Stanford, California 94305; USA.

THIS WORK IS PROVIDED FREE OF CHARGE AND WITHOUT ANY WARRANTIES.
Use the information herein at your own risk.


B. Patch to remedy the problem
==============================

Note that when taking this from a GnuPG clearsigned file, the lines 
starting with a "-" character are prefixed by another "- " (dash + 
blank) combination. Either feed this file through GnuPG to strip them, 
or strip them manually.

Whitespace differences can usually be ignored by invoking "patch -l",
so try this if the patch does not apply.

diff --git a/report.c b/report.c
index 31d4e48..320e60b 100644
- --- a/report.c
+++ b/report.c
@@ -238,11 +238,17 @@ report_build (FILE *errfp, message, va_alist)
     rep_ensuresize();
 
 #if defined(VA_START)
- -    VA_START (args, message);
     for ( ; ; )
     {
+	/*
+	 * args has to be initialized before every call of vsnprintf(), 
+	 * because vsnprintf() invokes va_arg macro and thus args is 
+	 * undefined after the call.
+	 */
+	VA_START(args, message);
 	n = vsnprintf (partial_message + partial_message_size_used, partial_message_size - partial_message_size_used,
 		       message, args);
+	va_end (args);
 
 	if (n >= 0
 	    && (unsigned)n < partial_message_size - partial_message_size_used)
@@ -254,7 +260,6 @@ report_build (FILE *errfp, message, va_alist)
 	partial_message_size += 2048;
 	partial_message = REALLOC (partial_message, partial_message_size);
     }
- -    va_end (args);
 #else
     for ( ; ; )
     {
@@ -304,12 +309,13 @@ report_complete (FILE *errfp, message, va_alist)
     rep_ensuresize();
 
 #if defined(VA_START)
- -    VA_START (args, message);
     for ( ; ; )
     {
+	VA_START(args, message);
 	n = vsnprintf (partial_message + partial_message_size_used,
 		       partial_message_size - partial_message_size_used,
 		       message, args);
+	va_end(args);
 
 	/* old glibc versions return -1 for truncation */
 	if (n >= 0
@@ -322,7 +328,6 @@ report_complete (FILE *errfp, message, va_alist)
 	partial_message_size += 2048;
 	partial_message = REALLOC (partial_message, partial_message_size);
     }
- -    va_end (args);
 #else
     for ( ; ; )
     {

END OF fetchmail-SA-2008-01.txt
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From: Robert Buchholz
Date: Tue, 24 Jun 2008 01:01:30 +0100
--nextPart67465189.ME4cKaNkSD
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 200806-10
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                            http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

  Severity: Normal
     Title: FreeType: User-assisted execution of arbitrary code
      Date: June 23, 2008
      Bugs: #225851
        ID: 200806-10

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
========

Font parsing vulnerabilities in FreeType might lead to user-assisted
execution of arbitrary code.

Background
==========

FreeType is a font rendering library for TrueType Font (TTF) and
Printer Font Binary (PFB).

Affected packages
=================

    -------------------------------------------------------------------
     Package              /  Vulnerable  /                  Unaffected
    -------------------------------------------------------------------
  1  media-libs/freetype       < 2.3.6                        >= 2.3.6

Description
===========

Regenrecht reported multiple vulnerabilities in FreeType via iDefense:

* An integer overflow when parsing values in the Private dictionary
  table in a PFB file, leading to a heap-based buffer overflow
  (CVE-2008-1806).

* An invalid free() call related to parsing an invalid "number of
  axes" field in a PFB file (CVE-2008-1807).

* Multiple off-by-one errors when parsing PBF and TTF files, leading
  to heap-based buffer overflows (CVE-2008-1808).

Impact
======

A remote attacker could entice a user to open a specially crafted TTF
or PBF file, possibly resulting in the execution of arbitrary code with
the privileges of the user running an application linked against
FreeType (such as the X.org X server, running as root).

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All FreeType users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-libs/freetype-2.3.6"

References
==========

  [ 1 ] CVE-2008-1806
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1806
  [ 2 ] CVE-2008-1807
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1807
  [ 3 ] CVE-2008-1808
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1808

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200806-10.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2008 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5

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From: Robert Buchholz
Date: Tue, 24 Jun 2008 00:13:20 +0100
--nextPart1918208.b26cJrLgrH
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                        GLSA 200806-09:02
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                            http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

  Severity: Normal
     Title: libvorbis: Multiple vulnerabilities
      Date: June 23, 2008
   Updated: June 23, 2008
      Bugs: #222085
        ID: 200806-09:02

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
========

Multiple vulnerabilities in libvorbis might lead to the execution of
arbitrary code.

Background
==========

libvorbis is the reference implementation of the Xiph.org Ogg Vorbis
audio file format. It is used by many applications for playback of Ogg
Vorbis files.

Affected packages
=================

    -------------------------------------------------------------------
     Package               /   Vulnerable   /               Unaffected
    -------------------------------------------------------------------
  1  media-libs/libvorbis      < 1.2.1_rc1                >= 1.2.1_rc1

Description
===========

Will Drewry of the Google Security Team reported multiple
vulnerabilities in libvorbis:

* A zero value for "codebook.dim" is not properly handled, leading to
  a crash, infinite loop or triggering an integer overflow
  (CVE-2008-1419).

* An integer overflow in "residue partition value" evaluation might
  lead to a heap-based buffer overflow (CVE-2008-1420).

* An integer overflow in a certain "quantvals" and "quantlist"
  calculation might lead to a heap-based buffer overflow
  (CVE-2008-1423).

Impact
======

A remote attacker could exploit these vulnerabilities by enticing a
user to open a specially crafted Ogg Vorbis file or network stream with
an application using libvorbis. This might lead to the execution of
arbitrary code with the privileges of the user playing the file or a
Denial of Service by a crash or CPU consumption.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All libvorbis users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot -v ">=media-libs/libvorbis-1.2.1_rc1"

References
==========

  [ 1 ] CVE-2008-1419
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1419
  [ 2 ] CVE-2008-1420
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1420
  [ 3 ] CVE-2008-1423
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1423

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200806-09.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2008 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5

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From: Robert Buchholz
Date: Mon, 23 Jun 2008 23:48:39 +0100
--nextPart4421479.MSY37hpPDt
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Gentoo Linux Security Advisory                           GLSA 200806-08
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                            http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

  Severity: Normal
     Title: OpenSSL: Denial of Service
      Date: June 23, 2008
      Bugs: #223429
        ID: 200806-08

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
========

Two vulnerabilities might allow for a Denial of Service of daemons
using OpenSSL.

Background
==========

OpenSSL is an Open Source toolkit implementing the Secure Sockets Layer
(SSL v2/v3) and Transport Layer Security (TLS v1) as well as a general
purpose cryptography library.

Affected packages
=================

    -------------------------------------------------------------------
     Package           /   Vulnerable   /                   Unaffected
    -------------------------------------------------------------------
  1  dev-libs/openssl      < 0.9.8g-r2                    >= 0.9.8g-r2
                                                              < 0.9.8f

Description
===========

Ossi Herrala and Jukka Taimisto of Codenomicon discovered two
vulnerabilities:

* A double free() call in the TLS server name extension
  (CVE-2008-0891).

* The OpenSSL client code does not properly handle servers that omit
  the Server Key Exchange message in the TLS handshake (CVE-2008-1672).

Impact
======

A remote attacker could connect to a vulnerable server, or entice a
daemon to connect to a malicious server, causing a Denial of Service of
the daemon in both cases.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All OpenSSL users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-libs/openssl-0.9.8g-r2"

References
==========

  [ 1 ] CVE-2008-0891
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0891
  [ 2 ] CVE-2008-1672
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1672

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200806-08.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2008 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5

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Do it quickly and easily when you get a new computer before doing anything else.. .

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