SuSE: 'esound' update

    Date11 Oct 2000
    CategorySuSE
    2341
    Posted ByLinuxSecurity Advisories
    A vulnerability exists in the esound package in SuSE versions >= 6.3.
    
    ______________________________________________________________________________
    
                            SuSE Security Announcement
    
            Package:                esound
            Date:                   Wednesday, October 11th, 2000 19:00 MEST
            Affected SuSE versions: 6.3, 6.4, 7.0
            Vulnerability Type:     local user compromise
            Severity (1-10):        3
            SuSE default package:   yes
            Other affected systems: Linux systems using esound with unix domain 
                                    socket support
    
        Content of this advisory:
            1) security vulnerability resolved: esound
               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
    
        esound, a daemon program for the Gnome desktop, is used for sound replay
        by various programs such as windowmanagers and other applications.
        The esound daemon creates a directory /tmp/.esd to host a unix domain
        socket. Upon startup, the daemon changes the modes of the socket, but
        a race condition allows an attacker to place a symlink into the 
        directory to point to an arbitrary file belonging to the victim. By
        consequence, an attacker may be able to change the permissions of any
        file belonging to the victim. If the victim's userid is root, the 
        attacker may be able to change the modes of any file in the system.
    
        SuSE distributions before SuSE-6.3 were not vulnerable to this attack
        because unix domain sockets were not supported by the esound daemon as
        shipped with these distributions.
    
        The only efficient solution for the problem is to store the unix domain
        socket in a directory where only the user has write access to. The 
        user's home directory is such a location.
    
        Update packages that fix the race conditions by placing the sockets into
        the user's home directory are available for download. It is recommended 
        to apply the fix on systems where multiple users can access the local 
        filesystem.
    
        Note: Not all filesystems support unix domain sockets. The fix might 
              not work if the user's home directory is on such a filesystem
              (such as AFS, eg.). In such rare cases, administrators are usually
              aware of such limitations. SuSE default installations do not have
              this limitation.
    
        Download the update package from locations desribed below and install 
        the package with the command `rpm -Fhv file.rpm'. The md5sum for each
        file is in the line below. You can verify the integrity of the rpm
        files using the command
            `rpm --checksig --nogpg file.rpm',
        independently from the md5 signatures below.
    
    
        i386 Intel Platform:
    
        SuSE-7.0
         ftp://ftp.suse.com/pub/suse/i386/update/7.0/snd1/esound-0.2.19-15.i386.rpm
          9d8addaa5ba29554a727eb34ae5189f4
        source rpm:
         ftp://ftp.suse.com/pub/suse/i386/update/7.0/zq1/esound-0.2.19-15.src.rpm
          a9724b99a96430b1b7c1f741a8e8d528
    
        SuSE-6.4
         ftp://ftp.suse.com/pub/suse/i386/update/6.4/snd1/esound-0.2.16-75.i386.rpm
          6f32f0867d1597a5129d0516438d9cca
        source rpm:
         ftp://ftp.suse.com/pub/suse/i386/update/6.4/zq1/esound-0.2.16-75.src.rpm
          94ca6842981f7a501300d9edfc5cbf73
    
        SuSE-6.3
         ftp://ftp.suse.com/pub/suse/i386/update/6.3/snd1/esound-0.2.15-21.i386.rpm
          16a5804a2f27e62d73df40d206b047ca
        source rpm:
         ftp://ftp.suse.com/pub/suse/i386/update/6.3/zq1/esound-0.2.15-21.src.rpm
          c86689fd5d9f719135e1263dd5a38832
    
    
        Sparc Platform:
    
        SuSE-7.0
        
    ftp://ftp.suse.com/pub/suse/sparc/update/7.0/snd1/esound-0.2.19-15.sparc.rpm
          112648ef64c351952f832b180fcca23c
        source rpm:
         ftp://ftp.suse.com/pub/suse/sparc/update/7.0/zq1/esound-0.2.19-15.src.rpm
          a0bb3e3517ca83c13abd6827a8d2295e
    
    
    
        AXP Alpha Platform:
    
        SuSE-6.4
         ftp://ftp.suse.com/pub/suse/axp/update/6.4/snd1/esound-0.2.16-75.alpha.rpm
          d2efefb21a6424a81e63788d972db49d
        source rpm:
         ftp://ftp.suse.com/pub/suse/axp/update/6.4/zq1/esound-0.2.16-75.src.rpm
          a69ebae320c6f118f4b9e07f2a9af4d2
    
        SuSE-6.3
         ftp://ftp.suse.com/pub/suse/axp/update/6.3/snd1/esound-0.2.15-21.alpha.rpm
          19942e308eda0c0d505bb64da734ad8d
        source rpm:
         ftp://ftp.suse.com/pub/suse/axp/update/6.3/zq1/esound-0.2.15-21.src.rpm
          6f337d6864111d27fa93ef2bc3cb7b5a
    
    
    
        PPC Power PC Platform:
    
        SuSE-7.0
         ftp://ftp.suse.com/pub/suse/ppc/update/7.0/snd1/esound-0.2.19-16.ppc.rpm
            be6daabfee0e7e629b848814be81d9d0
        source rpm:
         ftp://ftp.suse.com/pub/suse/ppc/update/7.0/zq1/esound-0.2.19-16.src.rpm
            c77475b2c8fff104f8662bb9179efb64
    
        SuSE-6.4
         ftp://ftp.suse.com/pub/suse/ppc/update/6.4/snd1/esound-0.2.16-75.ppc.rpm
          f0e1aa54c3fdf7c6c02b34bedc51ee0f
        source rpm:
         ftp://ftp.suse.com/pub/suse/ppc/update/6.4/zq1/esound-0.2.16-75.src.rpm
          9acd25b5521201386bb73bc707382646
    
    ______________________________________________________________________________
    
    2)  Pending vulnerabilities in SuSE Distributions and Workarounds:
    
        - gnorpm
    
            A race condition has been found in the gnorpm program, a GUI for
            the rpm system. The issue will be addressed in a following 
            announcement.
    
    
        - ncurses
    
            The ncurses library contains buffer overflows that are exploitable
            when user-supplied terminfo databases are processed. This imposes a
            security risk on programs/binaries that are linked against libncurses
            and run with special privileges. Both workaround and clean solution
            is to remove the suid bit from all executable files with setuid bit
            set.
            The issue will be addressed in a following security announcement.
    
    
        - apache mod_rewrite
    
            A bug has been discovered in the apache package that allows attackers
            to read arbitrary files on a system that runs apache. The responsible
            apache module named "mod_rewrite" is not used by default on SuSE
            installations of the apache package. The issue will be addressed in 
            a following security announcement.
    
    
        - cfengine
    
            A format string parsing bug causes the cfengine package to be 
            vulnerable to a remote root attack. Update packages are available,
            the security announcement is pending.
    
    
        - usermode/userhelper
    
            userhelper is a suid helper program designed to let the user who
            is logged on to the console execute some programs with root 
            privileges. SuSE distributions do not contain the usermode package
            and therefore are not vulnerable to the security problems recently
            discovered in the usermode package.
    
    
        - tmpwatch
    
            The tmpwatch packages as shipped with SuSE distributions are not
            vulnerable to the attacks as discussed on security forums because
            we ship an older version that does not provide the functionality
            that can be exploited.
    
    
        - lprNG
    
            The versions of the lprNG package that come with SuSE distributions
            are not vulnerable to the format string parsing errors as discussed
            in security forums.
    
    
        - traceroute
    
            The traceroute program has been found vulnerable to a bug 
            (`traceroute -g 1 -g 1') in many distributions. Newer SuSE 
            distributions have a different implementation of the traceroute
            program and are not vulnerable to the bug found by 
            Pekka Savola <This email address is being protected from spambots. You need JavaScript enabled to view it.>. The vulnerability could not be
            verified in older SuSE distributions.
    
    
    ______________________________________________________________________________
    
    3)  standard appendix:
    
        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.>.
    
        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
                    <This email address is being protected from spambots. You need JavaScript enabled to view it.>.
    
        For general information or the frequently asked questions (faq) 
        send mail to:
            <This email address is being protected from spambots. You need JavaScript enabled to view it.> or
            <This email address is being protected from spambots. You need JavaScript enabled to view it.> respectively.
    
        ===============================================
        SuSE's security contact is <This email address is being protected from spambots. You need JavaScript enabled to view it.>.
        ===============================================
    
    Regards,
    Roman Drahtmüller.
    - - -- 
     -                                                                      -
    | Roman Drahtmüller      <This email address is being protected from spambots. You need JavaScript enabled to view it.> //          "Caution: Cape does |
      SuSE GmbH - Security           Phone: //       not enable user to fly."
    | Nürnberg, Germany     +49-911-740530 // (Batman Costume warning label) |
     -                                                                      -
    ______________________________________________________________________________
    
        The information in this advisory may be distributed or reproduced,
        provided that the advisory is not modified in any way.
        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  2048/3D25D3D9 1999/03/06 SuSE Security Team <This email address is being protected from spambots. You need JavaScript enabled to view it.>
    
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