SuSE Linux Advisory: mutt

____________________________________________________________________________

                        SuSE Security Announcement

        Package:                mutt
        Announcement-ID:        SuSE-SA:2003:020
        Date:                   Monday, Mar 24th 2003 14:42 MET
        Affected products:      7.1, 7.2, 7.3, 8.0, 8.1, 8.2
                                SuSE Linux Database Server,
                                SuSE eMail Server III, 3.1
                                SuSE Linux Enterprise Server 7,
                                SuSE Linux Enterprise Server 8,
                                SuSE Linux Firewall on CD/Admin host
                                SuSE Linux Connectivity Server
                                SuSE Linux Office Server
        Vulnerability Type:     remote system compromise
        Severity (1-10):        3
        SuSE default package:   yes
        Cross References:       CAN-2003-0140

    Content of this advisory:
        1) security vulnerability resolved: buffer overflow in IMAP code
           problem description, discussion, solution and upgrade information
        2) pending vulnerabilities, solutions, workarounds:
            - glibc
            - rxvt
            - apcupsd
            - vnc
            - openssl
        3) standard appendix (further information)

____________________________________________________________________________

1)  problem description, brief discussion, solution, upgrade information

    Mutt is a text-based Mail User Agent (MUA).
    The IMAP-code of mutt is vulnerable to a buffer overflow that can be
    exploited by a malicious IMAP-server to crash mutt or even execute
    arbitrary code with the privileges of the user running mutt.

    There is no temporary fix known.

    Please download the update package for your distribution and verify its
    integrity by the methods listed in section 3) of this announcement.
    Then, install the package using the command "rpm -Fhv file.rpm" to apply
    the update.
    Our maintenance customers are being notified individually. The packages
    are being offered to install from the maintenance web.

    Please note, missing packages will be published as soon as possible.


    Intel i386 Platform:

    SuSE-8.1:
    ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/mutt-1.4i-216.i586.rpm
      7d01a572e8ac3ec943c47c4171b4cc7a
    patch rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/mutt-1.4i-216.i586.patch.rpm
      7d30de523f8095a274795ceaee97d7a2
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/mutt-1.4i-216.src.rpm
      6c09fbf30683dc3c2c5826d95d9161e1

    SuSE-8.0:
    ftp://ftp.suse.com/pub/suse/i386/update/8.0/n1/mutt-1.3.27i-77.i386.rpm
      6727654fc00631af2cbefcef6f47c044
    patch rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/8.0/n1/mutt-1.3.27i-77.i386.patch.rpm
      63fcdb2d0ec41b35a618b59bae1681f3
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/mutt-1.3.27i-77.src.rpm
      ac0cba7e06dbe4436dbbef1113162efb

    SuSE-7.3:
    ftp://ftp.suse.com/pub/suse/i386/update/7.3/n1/mutt-1.3.22.1i-170.i386.rpm
      285d09493353a097f00cb069dfd753b6
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/7.3/zq1/mutt-1.3.22.1i-170.src.rpm
      c7c543c526600da535cd49738866f84c

    SuSE-7.2:
    ftp://ftp.suse.com/pub/suse/i386/update/7.2/n1/mutt-1.3.16i-92.i386.rpm
      28452778101886f7aab8b4cf2f40712d
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/7.2/zq1/mutt-1.3.16i-92.src.rpm
      9fe4038f89a4d2562571a49b6c0de7cf

    SuSE-7.1:
    ftp://ftp.suse.com/pub/suse/i386/update/7.1/n1/mutt-1.3.12i-69.i386.rpm
      0ece2802274e74bcea56a0787ca0b512
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/i386/update/7.1/zq1/mutt-1.3.12i-69.src.rpm
      d3b0bd624681e4d8cbe7ba235ca6c7d0



    Sparc Platform:

    SuSE-7.3:
    ftp://ftp.suse.com/pub/suse/sparc/update/7.3/n1/mutt-1.3.22.1i-39.sparc.rpm
      ddb9432dd66ca568a80dc11fb1c11c4d
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/sparc/update/7.3/zq1/mutt-1.3.22.1i-39.src.rpm
      b32b6c0111f3a3f9004388c6a1af5d39




    AXP Alpha Platform:

    SuSE-7.1:
    ftp://ftp.suse.com/pub/suse/axp/update/7.1/n1/mutt-1.3.12i-15.alpha.rpm
      1166abe4889a909b92ad3277b4c2d953
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/axp/update/7.1/zq1/mutt-1.3.12i-15.src.rpm
      e15c47bb9b5e0b72113b7d6612ad0557



    PPC Power PC Platform:

    SuSE-7.3:
    ftp://ftp.suse.com/pub/suse/ppc/update/7.3/n1/mutt-1.3.22.1i-124.ppc.rpm
      b3332965c3edad4bf9cda5c1381da51f
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/ppc/update/7.3/zq1/mutt-1.3.22.1i-124.src.rpm
      89640af34db08a5ed8708807e9e20e1e

    SuSE-7.1:
    ftp://ftp.suse.com/pub/suse/ppc/update/7.1/n1/mutt-1.3.12i-16.ppc.rpm
      5f2237363e057b1f5c8f3a2a79476e85
    source rpm(s):
    ftp://ftp.suse.com/pub/suse/ppc/update/7.1/zq1/mutt-1.3.12i-16.src.rpm
      4bcb6b68e8ea0e00a43bf3d549d6bb46


____________________________________________________________________________

2)  Pending vulnerabilities in SuSE Distributions and Workarounds:

    - glibc
      An integer overflow was found in glibc's RPC-code. This bug enables
      attackers to compromise a system remotely.
      New packages are currently being build and will be available on our
      FTP servers soon.

    - rxvt
      A new version of the rxvt packages was put on our FTP servers.
      This version fix' the handling of dangerous escape-sequences.

    - apcupsd
      The control and management daemon for APC UPS systems is vulnerable
      to remote code execution due to buffer overflow and format string bugs.
      A dedicated advisory for this issue will be released as soon as all
      packages are being build.

    - vnc
      VNC (Virtual Network Computing) uses a weak cookie generation process
      which can be exploited by an attacker to bypass authentication.
      New packages are currently being tested and will be available on our
      FTP servers soon.

    - openssl
      A paper regarding remote timing attacks against OpenSSL has been
      published by researchers of the Stanford University. It is possible
      to extract the private RSA key used by services using OpenSSL by
      observing their timing behavior. Fixed packages will be available
      on our FTP servers soon.

____________________________________________________________________________

3)  standard appendix: authenticity verification, additional information

  - Package authenticity verification:

    SuSE update packages are available on many mirror ftp servers all over
    the world. While this service is being considered valuable and important
    to the free and open source software community, many users wish to be
    sure about the origin of the package and its content before installing
    the package. There are two verification methods that can be used
    independently from each other to prove the authenticity of a downloaded
    file or rpm package:
    1) md5sums as provided in the (cryptographically signed) announcement.
    2) using the internal gpg signatures of the rpm package.

    1) execute the command
        md5sum 
       after you downloaded the file from a SuSE ftp server or its mirrors.
       Then, compare the resulting md5sum with the one that is listed in the
       announcement. Since the announcement containing the checksums is
       cryptographically signed (usually using the key [email protected]),
       the checksums show proof of the authenticity of the package.
       We disrecommend to subscribe to security lists which cause the
       email message containing the announcement to be modified so that
       the signature does not match after transport through the mailing
       list software.
       Downsides: You must be able to verify the authenticity of the
       announcement in the first place. If RPM packages are being rebuilt
       and a new version of a package is published on the ftp server, all
       md5 sums for the files are useless.

    2) rpm package signatures provide an easy way to verify the authenticity
       of an rpm package. Use the command
        rpm -v --checksig 
       to verify the signature of the package, where  is the
       filename of the rpm package that you have downloaded. Of course,
       package authenticity verification can only target an un-installed rpm
       package file.
       Prerequisites:
        a) gpg is installed
        b) The package is signed using a certain key. The public part of this
           key must be installed by the gpg program in the directory
           ~/.gnupg/ under the user's home directory who performs the
           signature verification (usually root). You can import the key
           that is used by SuSE in rpm packages for SuSE Linux by saving
           this announcement to a file ("announcement.txt") and
           running the command (do "su -" to be root):
            gpg --batch; gpg < announcement.txt | gpg --import
           SuSE Linux distributions version 7.1 and thereafter install the
           key "[email protected]" upon installation or upgrade, provided that
           the package gpg is installed. The file containing the public key
           is placed at the top-level directory of the first CD (pubring.gpg)
           and at ftp://ftp.suse.com/pub/suse/pubring.gpg-build.suse.de .


  - SuSE runs two security mailing lists to which any interested party may
    subscribe:

    [email protected]
        -   general/linux/SuSE security discussion.
            All SuSE security announcements are sent to this list.
            To subscribe, send an email to
                <<A HREF="mailto:[email protected]">[email protected]>.

    [email protected]
        -   SuSE's announce-only mailing list.
            Only SuSE's security announcements are sent to this list.
            To subscribe, send an email to
                <<A HREF="mailto:[email protected]">[email protected]>.

    For general information or the frequently asked questions (faq)
    send mail to:
        <<A HREF="mailto:[email protected]">[email protected]> or
        <<A HREF="mailto:[email protected]">[email protected]> respectively.

    =====================================================================
    SuSE's security contact is <<A HREF="mailto:[email protected]">[email protected]> or <<A HREF="mailto:[email protected]">[email protected]>.
    The <<A HREF="mailto:[email protected]">[email protected]> public key is listed below.
    =====================================================================
____________________________________________________________________________

    The information in this advisory may be distributed or reproduced,
    provided that the advisory is not modified in any way. In particular,
    it is desired that the clear-text signature shows proof of the
    authenticity of the text.
    SuSE Linux AG makes no warranties of any kind whatsoever with respect
    to the information contained in this security advisory.

Type Bits/KeyID    Date       User ID
pub  2048R/3D25D3D9 1999-03-06 SuSE Security Team <<A HREF="mailto:[email protected]">[email protected]>
pub  1024D/9C800ACA 2000-10-19 SuSE Package Signing Key <<A HREF="mailto:[email protected]">[email protected]>

Bye,
     Thomas
-- 
  Thomas Biege <<A HREF="mailto:[email protected]">[email protected]>
  SuSE Linux AG,Deutschherrnstr. 15-19,90429 Nuernberg
  Function: Security Support & Auditing
  "lynx -source http://www.suse.de/~thomas/contact/thomas.asc | gpg --import"
  Key fingerprint = 7254 B15D B3C4 943F 485E  0BBD 8ECC D7CB C200 A213