SuSE Information for VU#886083

WU-FTPD does not properly handle file name globbing

Status

Affected

Vendor Statement

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______________________________________________________________________________

                        SuSE Security Announcement

        Package:                wuftpd
       Announcement-ID:        SuSE-SA:2001:043
       Date:                   Wednesday, Nov. 28th, 2001 23:45 MET
       Affected SuSE versions: 6.3, 6.4, 7.0, 7.1, 7.2, 7.3
       Vulnerability Type:     remote root compromise
       Severity (1-10):        7
       SuSE default package:   no
       Other affected systems: all liunx-like systems using wu-ftpd 2.4.x /
                               2.6.0 / 2.6.1

        Content of this advisory:
       1) security vulnerability resolved: wuftpd
          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 wuftpd package as shipped with SuSE Linux distributions comes with
   two versions of wuftpd: wuftpd-2.4.2, installed as /usr/sbin/wuftpd,
   and wuftpd-2.6.0, installed as /usr/sbin/wuftpd-2.6.
   The admin decides which version to use by the inetd/xinetd
   configuration.

    The CORE ST Team had found an exploitable bug in all versions of wuftpd's
   ftpglob() function.
   The glob function overwrites buffer bounds while matching open and closed
   brackets. Due to a missing \0 at the end of the buffer a later call to a
   function that frees allocated memory will feed free(3) with userdefined
   data. This bug could be exploited depending on the implementation of
   the dynmaic allocateable memory API (malloc(3), free(3)) in the libc
   library. Linux and other system are exploitable!

    Some weeks ago, an internal source code audit of wu-ftpd 2.6.0 performed
   by Thomas Biege, SuSE Security, revealed some other security related bugs
   that are fixed in the new RPM packages. Additionally, code from wu-ftpd
   2.6.1 were backported to version 2.6.0 to make it more stable.

    A temporary fix other than using a different server implementation of
   the ftp protocol is not available. We recommend to update the wuftpd
   package on your system.

    We thank the wuftpd team for their work on the bug, particularly because
   the coordination between the vendors and the wuftpd developers lacked
   the necessary discipline for the timely release of the information
   about the problem.

    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 -Uhv file.rpm" to apply
   the update.


    i386 Intel Platform:

    SuSE-7.3
   ftp://ftp.suse.com/pub/suse/i386/update/7.3/n2/wuftpd-2.6.0-344.i386.rpm
     d1b549b8c2d91d66a8b35fe17a1943b3
   source rpm:
   ftp://ftp.suse.com/pub/suse/i386/update/7.3/zq1/wuftpd-2.6.0-344.src.rpm
     9ef0e6ac850499dc0150939c62bc146f

    SuSE-7.2
   ftp://ftp.suse.com/pub/suse/i386/update/7.2/n2/wuftpd-2.6.0-344.i386.rpm
     4583443a993107b26529331fb1e6254d
   source rpm:
   ftp://ftp.suse.com/pub/suse/i386/update/7.2/zq1/wuftpd-2.6.0-344.src.rpm
     aaee0343670feae70ccc9217a8e22211

    SuSE-7.1
   ftp://ftp.suse.com/pub/suse/i386/update/7.1/n2/wuftpd-2.6.0-346.i386.rpm
     347a030a85cb5fcbe32d3d79d382e19e
   source rpm:
   ftp://ftp.suse.com/pub/suse/i386/update/7.1/zq1/wuftpd-2.6.0-346.src.rpm
     aa3e53641f6ce0263196e6f1cb0447c3

    SuSE-7.0
   ftp://ftp.suse.com/pub/suse/i386/update/7.0/n1/wuftpd-2.6.0-344.i386.rpm
     e34eec18ecc10f187f6aa1aa3b24b75b
   source rpm:
   ftp://ftp.suse.com/pub/suse/i386/update/7.0/zq1/wuftpd-2.6.0-344.src.rpm
     fafc8c2bbd68dd5ca3d04228433c359a

    SuSE-6.4
   ftp://ftp.suse.com/pub/suse/i386/update/6.4/n1/wuftpd-2.6.0-344.i386.rpm
     2354abe95b056762c7f6584449291ff2
   source rpm:
   ftp://ftp.suse.com/pub/suse/i386/update/6.4/zq1/wuftpd-2.6.0-344.src.rpm
     507b8d484b13737c9d2b6a68fda0cc26

    SuSE-6.3
   ftp://ftp.suse.com/pub/suse/i386/update/6.3/n1/wuftpd-2.6.0-347.i386.rpm
     9851ad02e656bba8b5e02ed2ddb46845
   source rpm:
   ftp://ftp.suse.com/pub/suse/i386/update/6.3/zq1/wuftpd-2.6.0-347.src.rpm
     5d7c4b6824836ca28b228cc5dcfc4fd6



    Sparc Platform:

    SuSE-7.3
   ftp://ftp.suse.com/pub/suse/sparc/update/7.3/n2/wuftpd-2.6.0-240.sparc.rpm
     2d19e4ead17396a1e28fca8745f9629d
   source rpm:
   ftp://ftp.suse.com/pub/suse/sparc/update/7.3/zq1/wuftpd-2.6.0-240.src.rpm
     bdb0b5ddd72f8563db3c8e444a0df7f5

    SuSE-7.1
   ftp://ftp.suse.com/pub/suse/sparc/update/7.1/n2/wuftpd-2.6.0-242.sparc.rpm
     f6b04f284bece6bf3700facccc015ffe
   source rpm:
   ftp://ftp.suse.com/pub/suse/sparc/update/7.1/zq1/wuftpd-2.6.0-242.src.rpm
     1660547ac9a5a3b32a4070d69803cf18

    SuSE-7.0
   ftp://ftp.suse.com/pub/suse/sparc/update/7.0/n1/wuftpd-2.6.0-241.sparc.rpm
     1bd905b095b9a4bb354fc190b6e54a01
   source rpm:
   ftp://ftp.suse.com/pub/suse/sparc/update/7.0/zq1/wuftpd-2.6.0-241.src.rpm
     597263eb7d0fbbf242d519d3c126a441



    AXP Alpha Platform:

    SuSE-7.1
   ftp://ftp.suse.com/pub/suse/axp/update/7.1/n2/wuftpd-2.6.0-252.alpha.rpm
     e608bfd2cc9e511c6eb6932c33c68789
   source rpm:
   ftp://ftp.suse.com/pub/suse/axp/update/7.1/zq1/wuftpd-2.6.0-252.src.rpm
     34915af1ca79b27bad8bc2fd3a5cab05

    SuSE-7.0
   ftp://ftp.suse.com/pub/suse/axp/update/7.0/n1/wuftpd-2.6.0-251.alpha.rpm
     86a7d8f60d76a053873bcc13860b0bbb
   source rpm:
   ftp://ftp.suse.com/pub/suse/axp/update/7.0/zq1/wuftpd-2.6.0-251.src.rpm
     9674f9f1630b3107ac22d275705da76e

    SuSE-6.4
   ftp://ftp.suse.com/pub/suse/axp/update/6.4/n1/wuftpd-2.6.0-251.alpha.rpm
     2501444a1e4241e8f6f4cdcc6fd133b0
   source rpm:
   ftp://ftp.suse.com/pub/suse/axp/update/6.4/zq1/wuftpd-2.6.0-251.src.rpm
     34812d943900bdb902ad7edd40e1943f

    SuSE-6.3
   ftp://ftp.suse.com/pub/suse/axp/update/6.3/n1/wuftpd-2.6.0-250.alpha.rpm
     429a49ef9d4d0865fbb443c212b8a8c7
   source rpm:
   ftp://ftp.suse.com/pub/suse/axp/update/6.3/zq1/wuftpd-2.6.0-250.src.rpm
     76467dae0f460677ba80ec907eefca28



    PPC Power PC Platform:

    SuSE-7.3
   ftp://ftp.suse.com/pub/suse/ppc/update/7.3/n2/wuftpd-2.6.0-277.ppc.rpm
     a381269b3e2fc43fda59e4d08aef57ae
   source rpm:
   ftp://ftp.suse.com/pub/suse/ppc/update/7.3/zq1/wuftpd-2.6.0-277.src.rpm
     7cacb696a88e57a843402a796212aee6

    SuSE-7.1
   ftp://ftp.suse.com/pub/suse/ppc/update/7.1/n2/wuftpd-2.6.0-277.ppc.rpm
     bfc39be2c09323d96f974fdd0c73fda1
   source rpm:
   ftp://ftp.suse.com/pub/suse/ppc/update/7.1/zq1/wuftpd-2.6.0-277.src.rpm
     e2681b2ed4801ce14b5dfb926480ac51

    SuSE-7.0
   ftp://ftp.suse.com/pub/suse/ppc/update/7.0/n1/wuftpd-2.6.0-279.ppc.rpm
     19f989e637fd9b6fa652f8a4014bb7b1
   source rpm:
   ftp://ftp.suse.com/pub/suse/ppc/update/7.0/zq1/wuftpd-2.6.0-279.src.rpm
     76c493a915691c51a2481f0925e8ce39

    SuSE-6.4
   ftp://ftp.suse.com/pub/suse/ppc/update/6.4/n1/wuftpd-2.6.0-278.ppc.rpm
     ad29cf172bbd03a5e1f301cf6b9404e5
   source rpm:
   ftp://ftp.suse.com/pub/suse/ppc/update/6.4/zq1/wuftpd-2.6.0-278.src.rpm
     82338702692eba599d8c3d242aff3d1a



______________________________________________________________________________

2)  Pending vulnerabilities in SuSE Distributions and Workarounds:

    - ssh/openssh exploits
     The wrong fix for the crc32-compensation attack is currently actively
     exploited in the internet for both the ssh and the openssh
     implementation of the ssh-1 protocol.
     We urge our users to upgrade their ssh or openssh packages to the
     latest versions that are located on our ftp server at the usual
     directories, referred to via
     http://www.suse.de/de/support/security/adv004_ssh.txt from February
     earlier this year.
     Please note, the packages for the SuSE Linux distributions 7.0 and
     older containing cryptographic code are located on the German ftp
     server ftp.suse.de, the distributions 7.1 and newer have their crypto
     updates on ftp.suse.com. There are legal constraints beyond our
     control that lead to this situation.
     Openssh packages of the version 2.9.9p2 ready to download on the ftp
     server ftp.suse.com. They fix the security problems mentioned above,
     along with a set of less serious security problems.
     The announcement is still pending while investigations about the
     status of the package are in progress.



    - libgtop_daemon
     The libgtop_daemon, part of the libgtop package for gathering and
     monitoring process and system information, has been found vulnerable
     to a format string error. We are in the process of providing fixes for
     the affected distributions 6.4-7.3. In the meanwhile, we recommend to
     disable the libgtop_daemon on systems where it is running. This daemon
     is neither installed nor started (if installed) by default on SuSE
     Systems.


    - kernel updates
     A bug in the elf loader of the linux kernels version 2.4 from our
     announcement SSA:2001:036 can cause a system to crash if a user
     executes a vmlinux kernel image. We are preparing another update
     series to workaround this problem and will re-issue the kernel
     announcement as soon as possible.


______________________________________________________________________________

3)  standard appendix:

    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-subscribe@suse.com>.

    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
               <suse-security-announce-subscribe@suse.com>.

    For general information or the frequently asked questions (faq)
   send mail to:
       <suse-security-info@suse.com> or
       <suse-security-faq@suse.com> respectively.

    ===============================================
   SuSE's security contact is <security@suse.com>.
   ===============================================

______________________________________________________________________________

    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.


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Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Vendor References

None

Addendum

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