SuSE: 'imlib' Remote privilege escalation vulnerability

    Date07 May 2002
    CategorySuSE
    1916
    Posted ByLinuxSecurity Advisories
    An attacker could send a maliciously formated image file to trigger a Denial-of-Service attack or even execute arbitrary code on the victim's machine.
    
    ______________________________________________________________________________
    
                            SuSE Security Announcement
    
            Package:                imlib
            Announcement-ID:        SuSE-SA:2002:015
            Date:                   Tuesday, May 7th 2002 11:30 MEST
            Affected products:      6.4, 7.0, 7.1, 7.2, 7.3, 8.0
            Vulnerability Type:     remote privilege escalation
            Severity (1-10):        3
            SuSE default package:   yes
            Other affected systems: all systems/applications using imlib
    
        Content of this advisory:
            1) security vulnerability resolved: imlib fallback and Denial-of-Service
               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
    
        The imlib library can be used by X11 applications to handle various
        kinds of image data.
    
        Imlib could, under certain circumstances, revert to using a netpbm
        library which is well known to have security problems and should not
        be used for handling untrusted data. Furthermore a heap corruption
        could occur in the imlib code.
        An attacker could send a maliciously formated image file to trigger
        a Denial-of-Service attack or even execute arbitrary code on the
        victim's machine.
        Thanks go to Al Viro and Alan Cox who discovered these bugs.
    
        The imlib RPM package is installed by default and affects all applications
        linked against imlib, like imager viewers, browsers, mail clients and
        so on.
    
        About 140 applications shipped with the SuSE Linux distribution depend
        on imlib. You need to update your system, as no temporary workaround is
        possbible.
    
        Please run ldconfig(8) as root after updating imlib and restart all
        applications using imlib.
    
    
        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.
    
    
    
        i386 Intel Platform:
    
        SuSE-8.0
          ftp://ftp.suse.com/pub/suse/i386/update/8.0/gra1/imlib-1.9.10-324.i386.patch.rpm
          9137d95a9205a335871a71341c2c70b4
        SuSE-8.0
          ftp://ftp.suse.com/pub/suse/i386/update/8.0/gra1/imlib-1.9.10-324.i386.rpm
          4abd84a67aacb2c2fa21582e228e6a1d
        SuSE-8.0
          ftp://ftp.suse.com/pub/suse/i386/update/8.0/gra3/imlib-config-1.9.10-324.i386.patch.rpm
          43103d0ff1e60f008499a69519d722d3
        SuSE-8.0
          ftp://ftp.suse.com/pub/suse/i386/update/8.0/gra3/imlib-config-1.9.10-324.i386.rpm
          02df11424f082e4aed1c93527f7bab69
        SuSE-8.0
          ftp://ftp.suse.com/pub/suse/i386/update/8.0/gra3/imlib-devel-1.9.10-324.i386.patch.rpm
          7680c38f5fef811bc96ff2fc00baafad
        SuSE-8.0
          ftp://ftp.suse.com/pub/suse/i386/update/8.0/gra3/imlib-devel-1.9.10-324.i386.rpm
          bb449e5db3bf0827168b78d7636accac
        source rpm:
          ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/imlib-1.9.10-324.src.rpm
          d7cb0ddd0e18d645191f967b5b6e8109
    
    
        SuSE-7.3
          ftp://ftp.suse.com/pub/suse/i386/update/7.3/gra1/imlib-1.9.10-305.i386.rpm
          b114e4ea9babf4ac8bd241674b0be0fd
        SuSE-7.3
          ftp://ftp.suse.com/pub/suse/i386/update/7.3/gra2/imlib-config-1.9.10-305.i386.rpm
          7b3cd1c19161ed500bc4a0306eb66d0c
        SuSE-7.3
          ftp://ftp.suse.com/pub/suse/i386/update/7.3/gra2/imlib-devel-1.9.10-305.i386.rpm
          41af6a469645a4ce4399935604cbf4c0
        source rpm:
          ftp://ftp.suse.com/pub/suse/i386/update/7.3/zq1/imlib-1.9.10-305.src.rpm
          1839a719883e4aa5e543ee1bd22dc780
    
    
        SuSE-7.2
          ftp://ftp.suse.com/pub/suse/i386/update/7.2/gra1/imlib-1.9.9-100.i386.rpm
          9ec9fb90418a6ba76432334cb7e15bb8
        SuSE-7.2
          ftp://ftp.suse.com/pub/suse/i386/update/7.2/gra2/imlib-config-1.9.9-100.i386.rpm
          584e88a451341910524740cc54ca9c64
        SuSE-7.2
          ftp://ftp.suse.com/pub/suse/i386/update/7.2/gra2/imlib-devel-1.9.9-100.i386.rpm
          c8c25f5396d565f75f68d48d7911813b
        source rpm:
          ftp://ftp.suse.com/pub/suse/i386/update/7.2/zq1/imlib-1.9.9-100.src.rpm
          a5691ba54118a52454d394e346a6b8b4
    
    
        SuSE-7.1
          ftp://ftp.suse.com/pub/suse/i386/update/7.1/gra1/imlib-1.9.8.1-132.i386.rpm
          dc9d57492cd4faa497e23e14fcf5e57b
        SuSE-7.1
          ftp://ftp.suse.com/pub/suse/i386/update/7.1/gra2/imlib-devel-1.9.8.1-132.i386.rpm
          58f03af3039c42db5b5a9d1a6acd9c27
        SuSE-7.1
          ftp://ftp.suse.com/pub/suse/i386/update/7.1/gra2/imlibcfe-1.9.8.1-132.i386.rpm
          b82aa8abda460e45094fb4a0d683971f
        source rpm:
          ftp://ftp.suse.com/pub/suse/i386/update/7.1/zq1/imlib-1.9.8.1-132.src.rpm
          f16db540325f4626aa5fda6ab5aa196b
    
    
        SuSE-7.0
          ftp://ftp.suse.com/pub/suse/i386/update/7.0/gra1/imlib-1.9.8.1-132.i386.rpm
          c089d699c31addadba09fd967677e535
        SuSE-7.0
          ftp://ftp.suse.com/pub/suse/i386/update/7.0/gra2/imlibcfe-1.9.8.1-132.i386.rpm
          ee3c4bf8ab5e7068afcfb7160c38653f
        SuSE-7.0
          ftp://ftp.suse.com/pub/suse/i386/update/7.0/gra2/imlibdev-1.9.8.1-132.i386.rpm
          253759ffd47eb19831e61c52673ebc6f
        source rpm:
          ftp://ftp.suse.com/pub/suse/i386/update/7.0/zq1/imlib-1.9.8.1-132.src.rpm
          2bb8b096627c72e25949d4e22fc26c3a
    
    
        SuSE-6.4
          ftp://ftp.suse.com/pub/suse/i386/update/6.4/gra1/imlib-1.9.8-13.i386.rpm
          b3175095dade1c545822b42707a99820
        SuSE-6.4
          ftp://ftp.suse.com/pub/suse/i386/update/6.4/gra2/imlibcfe-1.9.8-13.i386.rpm
          a54bfa0d5b6333c20497dfd6ae1c65f6
        SuSE-6.4
          ftp://ftp.suse.com/pub/suse/i386/update/6.4/gra2/imlibdev-1.9.8-13.i386.rpm
          6d5815e9cfc1e9020dd758fcf3e15f0b
        source rpm:
          ftp://ftp.suse.com/pub/suse/i386/update/6.4/zq1/imlib-1.9.8-13.src.rpm
          ce83d062fb32cf34ed6921490c732a51
    
    
    
        Sparc Platform:
    
        SuSE-7.3
          ftp://ftp.suse.com/pub/suse/sparc/update/7.3/gra1/imlib-1.9.10-110.sparc.rpm
          58f0df8b16d05b7b28d919c53b20ddfd
        SuSE-7.3
          ftp://ftp.suse.com/pub/suse/sparc/update/7.3/gra2/imlib-config-1.9.10-110.sparc.rpm
          92c1e1a5a67b0a73197f793101af5955
        SuSE-7.3
          ftp://ftp.suse.com/pub/suse/sparc/update/7.3/gra2/imlib-devel-1.9.10-110.sparc.rpm
          744db88a54bcff79068a7b2392e34fc2
        source rpm:
          ftp://ftp.suse.com/pub/suse/sparc/update/7.3/zq1/imlib-1.9.10-110.src.rpm
          fa4c576fea3185bc7624e50620dbaaf5
    
    
        SuSE-7.1
          ftp://ftp.suse.com/pub/suse/sparc/update/7.1/gra1/imlib-1.9.8.1-109.sparc.rpm
          dc3336004bc77ceca74035cb05b050f9
        SuSE-7.1
          ftp://ftp.suse.com/pub/suse/sparc/update/7.1/gra2/imlib-devel-1.9.8.1-109.sparc.rpm
          a27820491016c5ff1fac5706b7042158
        SuSE-7.1
          ftp://ftp.suse.com/pub/suse/sparc/update/7.1/gra2/imlibcfe-1.9.8.1-109.sparc.rpm
          b8b28901c088bc6763f462753ca58b7c
        source rpm:
          ftp://ftp.suse.com/pub/suse/sparc/update/7.1/zq1/imlib-1.9.8.1-109.src.rpm
          7605166c8ee6fa6439ade68e0d67c5c6
    
    
        SuSE-7.0
          ftp://ftp.suse.com/pub/suse/sparc/update/7.0/gra1/imlib-1.9.8.1-109.sparc.rpm
          8b1e28d9aa91061aed4569015e058fac
        SuSE-7.0
          ftp://ftp.suse.com/pub/suse/sparc/update/7.0/gra2/imlibcfe-1.9.8.1-109.sparc.rpm
          01c5dae090bfe25d641d3389a11c16c2
        SuSE-7.0
          ftp://ftp.suse.com/pub/suse/sparc/update/7.0/gra2/imlibdev-1.9.8.1-109.sparc.rpm
          3be7654afc64fb5a10c145f67dce9ba3
        source rpm:
          ftp://ftp.suse.com/pub/suse/sparc/update/7.0/zq1/imlib-1.9.8.1-109.src.rpm
          6531693204e86106ceee748758038a07
    
    
    
        AXP Alpha Platform:
    
        SuSE-7.1
          ftp://ftp.suse.com/pub/suse/axp/update/7.1/gra1/imlib-1.9.8.1-114.alpha.rpm
          a84242de9afeec0b77f9d85b54f51f5b
        SuSE-7.1
          ftp://ftp.suse.com/pub/suse/axp/update/7.1/gra2/imlib-devel-1.9.8.1-114.alpha.rpm
          a2829f4eba557fbc3160b6b4ffec0ac5
        SuSE-7.1
          ftp://ftp.suse.com/pub/suse/axp/update/7.1/gra2/imlibcfe-1.9.8.1-114.alpha.rpm
          691b3d75dab0a3487b9f57c9b3501b17
        source rpm:
          ftp://ftp.suse.com/pub/suse/axp/update/7.1/zq1/imlib-1.9.8.1-114.src.rpm
          58697086bf51f5231a1708765db8312c
    
    
        SuSE-7.0
          ftp://ftp.suse.com/pub/suse/axp/update/7.0/gra1/imlib-1.9.8.1-114.alpha.rpm
          fbbf3f167844f0b046aafc14fed3b50e
        SuSE-7.0
          ftp://ftp.suse.com/pub/suse/axp/update/7.0/gra2/imlibcfe-1.9.8.1-114.alpha.rpm
          e5a8c05ca99ce4b38de47b35258423d7
        SuSE-7.0
          ftp://ftp.suse.com/pub/suse/axp/update/7.0/gra2/imlibdev-1.9.8.1-114.alpha.rpm
          26cc11948b4d61d6e4c0aa35472d2d7d
        source rpm:
          ftp://ftp.suse.com/pub/suse/axp/update/7.0/zq1/imlib-1.9.8.1-114.src.rpm
          90df4b7a6860281ad6130b09e7e634e3
    
    
        SuSE-6.4
          ftp://ftp.suse.com/pub/suse/axp/update/6.4/gra1/imlib-1.9.8-12.alpha.rpm
          2b231d47fed0f5ac88299abbb6abb1cd
        SuSE-6.4
          ftp://ftp.suse.com/pub/suse/axp/update/6.4/gra2/imlibcfe-1.9.8-12.alpha.rpm
          99b4a22d820a3d846fc1bf0ca94843e4
        SuSE-6.4
          ftp://ftp.suse.com/pub/suse/axp/update/6.4/gra2/imlibdev-1.9.8-12.alpha.rpm
          a7e9b77c92c28fe6bd07d4d8634a5253
        source rpm:
          ftp://ftp.suse.com/pub/suse/axp/update/6.4/zq1/imlib-1.9.8-12.src.rpm
          11a996b48ee33c34b34acffad3a2a56c
    
    
    
        PPC Power PC Platform:
    
        SuSE-7.3
          ftp://ftp.suse.com/pub/suse/ppc/update/7.3/gra1/imlib-1.9.10-199.ppc.rpm
          f9c093c06636b62507846c6679e1e86d
        SuSE-7.3
          ftp://ftp.suse.com/pub/suse/ppc/update/7.3/gra2/imlib-config-1.9.10-199.ppc.rpm
          973e484ba78847b5c47d5d6ef3972f56
        SuSE-7.3
          ftp://ftp.suse.com/pub/suse/ppc/update/7.3/gra2/imlib-devel-1.9.10-199.ppc.rpm
          e06812ab04e4cbdc781d8e8d29dc3372
        source rpm:
          ftp://ftp.suse.com/pub/suse/ppc/update/7.3/zq1/imlib-1.9.10-199.src.rpm
          8f85b9a40d36d328deb20b3255ddc05c
    
    
        SuSE-7.1
          ftp://ftp.suse.com/pub/suse/ppc/update/7.1/gra1/imlib-1.9.8.1-103.ppc.rpm
          4a22c12194b6f1b80123a3466fe944c3
        SuSE-7.1
          ftp://ftp.suse.com/pub/suse/ppc/update/7.1/gra2/imlib-devel-1.9.8.1-103.ppc.rpm
          85139eb233c567783c053f110baadb66
        SuSE-7.1
          ftp://ftp.suse.com/pub/suse/ppc/update/7.1/gra2/imlibcfe-1.9.8.1-103.ppc.rpm
          ae31194e59d40267b36e38344b1ad139
        source rpm:
          ftp://ftp.suse.com/pub/suse/ppc/update/7.1/zq1/imlib-1.9.8.1-103.src.rpm
          6558c6ca5bee620485fd52a9a7ec316d
    
    
        SuSE-7.0
          ftp://ftp.suse.com/pub/suse/ppc/update/7.0/gra1/imlib-1.9.8.1-103.ppc.rpm
          e34ddef90edd1effb95771b5d7f6f935
        SuSE-7.0
          ftp://ftp.suse.com/pub/suse/ppc/update/7.0/gra2/imlibcfe-1.9.8.1-103.ppc.rpm
          13eb42a163f919c9a4c097d8dc55a4a3
        SuSE-7.0
          ftp://ftp.suse.com/pub/suse/ppc/update/7.0/gra2/imlibdev-1.9.8.1-103.ppc.rpm
          9e73db46c744ee38118c9cd4b97bda7a
        source rpm:
          ftp://ftp.suse.com/pub/suse/ppc/update/7.0/zq1/imlib-1.9.8.1-103.src.rpm
          d321ee18493970c45b232362653dc447
    
    
        SuSE-6.4
          ftp://ftp.suse.com/pub/suse/ppc/update/6.4/gra1/imlib-1.9.8-13.ppc.rpm
          3d255a622cd006656a662b0e7a5efb87
        SuSE-6.4
          ftp://ftp.suse.com/pub/suse/ppc/update/6.4/gra2/imlibcfe-1.9.8-13.ppc.rpm
          311ac75ac7622c6b453c5d6ed5ef9c28
        SuSE-6.4
          ftp://ftp.suse.com/pub/suse/ppc/update/6.4/gra2/imlibdev-1.9.8-13.ppc.rpm
          c5a86e6598a9fc801f56533e060dcc61
        source rpm:
          ftp://ftp.suse.com/pub/suse/ppc/update/6.4/zq1/imlib-1.9.8-13.src.rpm
          294626d55b89e1a5b940b4441172b578
    
    
    
    ______________________________________________________________________________
    
    2)  Pending vulnerabilities in SuSE Distributions and Workarounds:
    
      - screen
        A security report about a locally exploitable bug in screen's braile code
        was published on Bugtraq. SuSE ships screen without this code enabled.
        On SuSE version 8.0 screen isn't even running with higher privileges
        anymore.
    
    ______________________________________________________________________________
    
    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 This email address is being protected from spambots. You need JavaScript enabled to view it.),
           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 "This email address is being protected from spambots. You need JavaScript enabled to view it." 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:
    
        This email address is being protected from spambots. You need JavaScript enabled to view it.
            -   general/linux/SuSE security discussion.
                All SuSE security announcements are sent to this list.
                To subscribe, send an email to
                    .
    
        This email address is being protected from spambots. You need JavaScript enabled to view it.
            -   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 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 
    pub  1024D/9C800ACA 2000-10-19 SuSE Package Signing Key 
    
    -----BEGIN PGP PUBLIC KEY BLOCK-----
    Version: GnuPG v1.0.6 (GNU/Linux)
    Comment: For info see http://www.gnupg.org
    
    mQGiBDnu9IERBACT8Y35+2vv4MGVKiLEMOl9GdST6MCkYS3yEKeueNWc+z/0Kvff
    4JctBsgs47tjmiI9sl0eHjm3gTR8rItXMN6sJEUHWzDP+Y0PFPboMvKx0FXl/A0d
    M+HFrruCgBlWt6FA+okRySQiliuI5phwqkXefl9AhkwR8xocQSVCFxcwvwCglVcO
    QliHu8jwRQHxlRE0tkwQQI0D+wfQwKdvhDplxHJ5nf7U8c/yE/vdvpN6lF0tmFrK
    XBUX+K7u4ifrZlQvj/81M4INjtXreqDiJtr99Rs6xa0ScZqITuZC4CWxJa9GynBE
    D3+D2t1V/f8l0smsuYoFOF7Ib49IkTdbtwAThlZp8bEhELBeGaPdNCcmfZ66rKUd
    G5sRA/9ovnc1krSQF2+sqB9/o7w5/q2qiyzwOSTnkjtBUVKn4zLUOf6aeBAoV6NM
    CC3Kj9aZHfA+ND0ehPaVGJgjaVNFhPi4x0e7BULdvgOoAqajLfvkURHAeSsxXIoE
    myW/xC1sBbDkDUIBSx5oej73XCZgnj/inphRqGpsb+1nKFvF+rQoU3VTRSBQYWNr
    YWdlIFNpZ25pbmcgS2V5IDxidWlsZEBzdXNlLmRlPohcBBMRAgAcBQI57vSBBQkD
    wmcABAsKAwQDFQMCAxYCAQIXgAAKCRCoTtronIAKyl8sAJ98BgD40zw0GHJHIf6d
    NfnwI2PAsgCgjH1+PnYEl7TFjtZsqhezX7vZvYCIRgQQEQIABgUCOnBeUgAKCRCe
    QOMQAAqrpNzOAKCL512FZvv4VZx94TpbA9lxyoAejACeOO1HIbActAevk5MUBhNe
    LZa/qM2JARUDBRA6cGBvd7LmAD0l09kBATWnB/9An5vfiUUE1VQnt+T/EYklES3t
    XXaJJp9pHMa4fzFa8jPVtv5UBHGee3XoUNDVwM2OgSEISZxbzdXGnqIlcT08TzBU
    D9i579uifklLsnr35SJDZ6ram51/CWOnnaVhUzneOA9gTPSr+/fT3WeVnwJiQCQ3
    0kNLWVXWATMnsnT486eAOlT6UNBPYQLpUprF5Yryk23pQUPAgJENDEqeU6iIO9Ot
    1ZPtB0lniw+/xCi13D360o1tZDYOp0hHHJN3D3EN8C1yPqZd5CvvznYvB6bWBIpW
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