Articles / SuSE: mutt local privilege …

SuSE: mutt local privilege escalation

mutt, a popular mail client for Linux-like systems, is vulnerable to a buffer overflow that is remotely exploitable. Patches have been added to the versions of mutt as shipped with the affected distributions to fix the problem. Fixed packages are available from ftp.suse.com.
-----BEGIN PGP SIGNED MESSAGE-----

______________________________________________________________________________

                        SuSE Security Announcement

        Package:                mutt
        Announcement-ID:        SuSE-SA:2002:001
        Date:                   Monday, Jan 7th 2001 20:30 MET
        Affected SuSE versions: 6.4, 7.0, 7.1, 7.2, 7.3
        Vulnerability Type:     local privilege escalation
        Severity (1-10):        6
        SuSE default package:   yes
        Other affected systems: systems with the mutt mailer installed

    Content of this advisory:
        1) security vulnerability resolved: mutt
           problem description, discussion, solution and upgrade information
        2) pending vulnerabilities, solutions, workarounds
        3) standard appendix (further information)

______________________________________________________________________________

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

    mutt, a popular mail client for Linux-like systems, is vulnerable to a
    buffer overflow that is remotely exploitable. We have added patches to
    the versions of mutt as shipped with the affected distributions to fix
    the problem. We recommend to install the update package for your product
    and to restart all running instances of mutt.
    We thank Joost Pol for reporting the problem to the makers of mutt.


    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.

    NOTE:
    The SuSE Linux 7.0 distribution was shipped with two packages that contain
    the mutt mail program: "mutt" and "muttssl". For legal reasons, the
    muttssl package is available from the German ftp server ftp.suse.de.
    You can find out which version of the mutt package you are using with
    the following command:
        rpm -qf /usr/bin/mutt
    You only need to download and install the update package for the package
    that is installed on your system.



    i386 Intel Platform:

    SuSE-7.3
    ftp://ftp.suse.com/pub/suse/i386/update/7.3/n1/mutt-1.3.22.1i-105.i386.rpm
      65dd9854d16c9e3178aaff935486ab8a
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/7.3/zq1/mutt-1.3.22.1i-105.src.rpm
      6efacb822144a49de85bb417f677dba6

    SuSE-7.2
    ftp://ftp.suse.com/pub/suse/i386/update/7.2/n1/mutt-1.3.16i-71.i386.rpm
      012e18c5cd2122218b396ae3600fa875
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/7.2/zq1/mutt-1.3.16i-71.src.rpm
      5755b3e620a49bcb93893c524ecceb1b

    SuSE-7.1
    ftp://ftp.suse.com/pub/suse/i386/update/7.1/n1/mutt-1.3.12i-51.i386.rpm
      40df9d8f98dcebc7057849a246f16e21
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/7.1/zq1/mutt-1.3.12i-51.src.rpm
      c689f09724acc63065a66e291dedc85b

    SuSE-7.0
    ftp://ftp.suse.com/pub/suse/i386/update/7.0/n1/mutt-1.2.5i-38.i386.rpm
      1e7d85e9f499ebf4b3fe749d8669de9e
    ftp://ftp.suse.de/pub/suse/i386/update/7.0/sec1/muttssl-1.2.5i-14.i386.rpm
      a61d53a1e65299b558c799654e57203f
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/7.0/zq1/mutt-1.2.5i-38.src.rpm
      543834be481fc61d8390a72cd42feeb0
    source rpm:
    ftp://ftp.suse.de/pub/suse/i386/update/7.0/zq1/muttssl-1.2.5i-14.src.rpm
      e67f148dee40a385136bc31240d51be6

    SuSE-6.4
    ftp://ftp.suse.com/pub/suse/i386/update/6.4/n1/mutt-1.0.1i-30.i386.rpm
      53bae9b840be86683d670b784ec28c8c
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/6.4/zq1/mutt-1.0.1i-30.src.rpm
      c9ebd840ac72c5a3cfe9f45444f9a5e9



    Sparc Platform:

    SuSE-7.3
    ftp://ftp.suse.com/pub/suse/sparc/update/7.3/n1/mutt-1.3.22.1i-27.sparc.rpm
      946ba6c36bd8c46d1ab494f54b288dc6
    source rpm:
    ftp://ftp.suse.com/pub/suse/sparc/update/7.3/zq1/mutt-1.3.22.1i-27.src.rpm
      9009e2d4e4f32d437422b8e8ed12ef55

    SuSE-7.1
    ftp://ftp.suse.com/pub/suse/sparc/update/7.1/n1/mutt-1.3.12i-6.sparc.rpm
      50f4f657a6a8bba819a34b2a05a9ea17
    source rpm:
    ftp://ftp.suse.com/pub/suse/sparc/update/7.1/zq1/mutt-1.3.12i-6.src.rpm
      e7d3565e2063d76909c1a44e347f71de

    SuSE-7.0
    ftp://ftp.suse.com/pub/suse/sparc/update/7.0/n1/mutt-1.2.5i-6.sparc.rpm
      fe06ca8880f38ea3064764614515f283
    ftp://ftp.suse.de/pub/suse/sparc/update/7.0/sec1/muttssl-1.2.5i-8.sparc.rpm
      3bdec5870cdddb5be68a8da3ff093de8
    source rpm:
    ftp://ftp.suse.com/pub/suse/sparc/update/7.0/zq1/mutt-1.2.5i-6.src.rpm
      e3492d0390a7271def3955030a5451a0
    source rpm:
    ftp://ftp.suse.de/pub/suse/sparc/update/7.0/zq1/muttssl-1.2.5i-8.src.rpm
      3946004fc966f4135f47ff419bc2d1d6




    AXP Alpha Platform:

    SuSE-7.1
    ftp://ftp.suse.com/pub/suse/axp/update/7.1/n1/mutt-1.3.12i-5.alpha.rpm
      0cf2bd45bf05aded0468cad34774cac6
    source rpm:
    ftp://ftp.suse.com/pub/suse/axp/update/7.1/zq1/mutt-1.3.12i-5.src.rpm
      7b04b3b10bb07c1d05ecd2322fd92be9

    The AXP Alpha mutt packages for older distributions than 7.1 are currently
    being built and will appear at the usual location shortly.

    PPC Power PC Platform:

    SuSE-7.3
    ftp://ftp.suse.com/pub/suse/ppc/update/7.3/n1/mutt-1.3.22.1i-63.ppc.rpm
      023ad9fde88518a3c07e183712305fd7
    source rpm:
    ftp://ftp.suse.com/pub/suse/ppc/update/7.3/zq1/mutt-1.3.22.1i-63.src.rpm
      ed935acf49c36bcb290f4db37c7ae800


    The PPC packages for SuSE Linux 7.1 are currently being built and will
    appear at the usual location shortly.


    SuSE-7.0
    ftp://ftp.suse.com/pub/suse/ppc/update/7.0/n1/mutt-1.2.5i-12.ppc.rpm
      476ed5e796692adda068a49ed2baf95e
    ftp://ftp.suse.de/pub/suse/ppc/update/7.0/sec1/muttssl-1.2.5i-11.ppc.rpm
      f4cb8011468d3e476fd7e24f733aec70
    source rpm:
    ftp://ftp.suse.com/pub/suse/ppc/update/7.0/zq1/mutt-1.2.5i-12.src.rpm
      550d058119f86c54a04d7506dbc1e878
    source rpm:
    ftp://ftp.suse.de/pub/suse/ppc/update/7.0/zq1/muttssl-1.2.5i-11.src.rpm
      caa60a063952cb54582bf7a0885d5d81

    SuSE-6.4
    ftp://ftp.suse.com/pub/suse/ppc/update/6.4/n1/mutt-1.0.1i-30.ppc.rpm
      2ae9d12e448f9f519441c74aeeb64d4d
    source rpm:
    ftp://ftp.suse.com/pub/suse/ppc/update/6.4/zq1/mutt-1.0.1i-30.src.rpm
      e2ae04f334216cbcd82f906a3a2bb83f




______________________________________________________________________________

2)  Pending vulnerabilities in SuSE Distributions and Workarounds:

  - SuSE Security receive reports about successful exploitation of the
    problems in the secure shell package (ssh-1.2.27) on SuSE systems.
    Please read the secure shell security announcement from February
    2001, available at
    http://www.suse.de/de/support/security/adv004_ssh.txt .
    More additional information can be found in the openssh announcement at
    http://www.suse.de/de/support/security/2001_045_openssh_txt.txt .

______________________________________________________________________________

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 security@suse.de),
       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 uninstalled 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 "build@suse.de" upon installation or upgrade, provided that
           the package gpg is installed. The file containing the public key
           is placed at the toplevel 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:

    suse-security@suse.com
        -   general/linux/SuSE security discussion.
            All SuSE security announcements are sent to this list.
            To subscribe, send an email to
                .

    suse-security-announce@suse.com
        -   SuSE's announce-only mailing list.
            Only SuSE's security annoucements are sent to this list.
            To subscribe, send an email to
                .

    For general information or the frequently asked questions (faq)
    send mail to:
         or
         respectively.

    =====================================================================
    SuSE's security contact is  or .
    The  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 cleartext signature shows proof of the
    authenticity of the text.
    SuSE GmbH 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 
pub  1024D/9C800ACA 2000-10-19 SuSE Package Signing Key 

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