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SuSE Security Announcement: syslogd/klogd
From: Roman Drahtmueller <draht () suse de>
Date: Wed, 20 Sep 2000 03:09:34 +0200

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______________________________________________________________________________

                        SuSE Security Announcement

        Package:                syslogd/klogd
        Date:                   Wednesday, September 20th, 2000 03:00 MEST
        Affected SuSE versions: 6.1 6.2, 6.3, 6.4, 7.0
        Vulnerability Type:     local DoS, possible root compromise
        Severity (1-10):        5
        SuSE default package:   yes
        Other affected systems: Linux systems, possibly unix systems

    Content of this advisory:
        1) security vulnerability resolved: syslogd/klogd
           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 syslogd package consists of two daemons that are being launched upon
    system startup: klogd and syslogd. The former collects kernel messages
    and passes them on to the syslog(3) facility. syslogd will pick up the
    logging messages and write them to the logfiles as specified by the
    syslogd configuration file /etc/syslog.conf. Errors in both the klogd
    and the syslogd can cause both daemons do die when specially designed
    strings get passed to the kernel by the user, eg. with a malformed
    structure in a system call. These errors have been discovered by Jouko
    Pynnönen, Solar Designer, a fix for one of the bugs has been provided
    by Daniel Jacobowitz.

    There is currently no known way to exploit these bugs with an
    effect other than a DoS (Denial of Service) of the syslog/klog service.
    Since it may be possible to execute arbitrary code as a result of a
    buffer overflow, administrators should consider applying the patches
    as soon as possible. Also, logging messages resulting from firewall
    rules in the kernel can get lost if the daemon does not pick them up.
    Efficient temporary countermeasures against these attacks other than
    package upgrade do not exist.

    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/a1/syslogd-1.3.33-161.i386.rpm
      284b1975cda65cd6ed5ce65672706e19
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/7.0/zq1/syslogd-1.3.33-161.src.rpm
      49c7a171753171f4e6fd772453d46a93

    SuSE-6.4
    ftp://ftp.suse.com/pub/suse/i386/update/6.4/a1/syslogd-1.3.33-161.i386.rpm
      cb89ed419b0c9dbf7c66191a58606920
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/6.4/zq1/syslogd-1.3.33-161.src.rpm
      33686198aa6412401b0056241829aae0

    SuSE-6.3
    ftp://ftp.suse.com/pub/suse/i386/update/6.3/a1/syslogd-1.3.33-161.i386.rpm
      af5e43976fb9814e1f5d626e16c2d176
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/6.3/zq1/syslogd-1.3.33-161.src.rpm
      1e821f6fda1f471d36e9b4990aa496b4

    SuSE-6.2
    ftp://ftp.suse.com/pub/suse/i386/update/6.2/a1/syslogd-1.3.33-9.i386.rpm
      fc29df9455288f40eb1e8dbd0f47d5b3
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/6.2/zq1/syslogd-1.3.33-9.src.rpm
      ae980989a754e6bf85de9dd60676b321

    SuSE-6.1
    ftp://ftp.suse.com/pub/suse/i386/update/6.1/a1/syslogd-1.3.33-161.i386.rpm
      c8d23ec6c3a9f944c15d6e12ffebc66f
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/6.1/zq1/syslogd-1.3.33-161.src.rpm
      b0329c20caf1d1d427da9961240732f5

    SuSE-5.3
    ftp://ftp.suse.com/pub/suse/i386/update/5.3/a1/syslogd-1.3.33-9.i386.rpm
      3104e26a8b474e215ed703b7c4d48888
    source rpm:
    ftp://ftp.suse.com/pub/suse/i386/update/5.3/zq1/syslogd-1.3.33-9.src.rpm
      09c9539df1c4225d2366a2a860b01dbb


    Sparc Platform:

    SuSE-7.0
    ftp://ftp.suse.com/pub/suse/sparc/update/7.0/a1/syslogd-1.3.33-161.sparc.rpm
      38bb40e8bdfd55387f0e25407d4e5cbd
    source rpm:
    ftp://ftp.suse.com/pub/suse/sparc/update/7.0/zq1/syslogd-1.3.33-161.src.rpm
      2017cbca57305092c0a912b77c2411dd



    AXP Alpha Platform:

    SuSE-6.4
    ftp://ftp.suse.com/pub/suse/axp/update/6.4/a1/syslogd-1.3.33-162.alpha.rpm
      419ea3172f4532f77c4fc5907de345f2
    source rpm:
    ftp://ftp.suse.com/pub/suse/axp/update/6.4/zq1/syslogd-1.3.33-162.src.rpm
      44cb992c94dffff0d31b65a0938fc1cc

    SuSE-6.3
    ftp://ftp.suse.com/pub/suse/axp/update/6.3/a1/syslogd-1.3.33-161.alpha.rpm
      84cfb8fa2e471baadf96eae1d3be1d0a
    source rpm:
    ftp://ftp.suse.com/pub/suse/axp/update/6.3/zq1/syslogd-1.3.33-161.src.rpm
      23ee4562c993de6943cead4878e73259

    SuSE-6.1
    ftp://ftp.suse.com/pub/suse/axp/update/6.1/a1/syslogd-1.3.33-161.alpha.rpm
      3b04489436b536d3d2e4b4bec6bc5ced
    source rpm:
    ftp://ftp.suse.com/pub/suse/axp/update/6.1/zq1/syslogd-1.3.33-161.src.rpm
      ab7edad2685d8d820b0f72b470048e81


    PPC Power PC Platform:

    SuSE-6.4
    ftp://ftp.suse.com/pub/suse/ppc/update/6.4/a1/syslogd-1.3.33-161.ppc.rpm
      9d588d1d4614d173b60746ae74fc6046
    source rpm:
    ftp://ftp.suse.com/pub/suse/ppc/update/6.4/zq1/syslogd-1.3.33-161.src.rpm
      eae3b0cd9b7de4ded453e9151b722b0e
______________________________________________________________________________

2)  Pending vulnerabilities in SuSE Distributions and Workarounds:

    This is the updated list of currently known security problems. Other
    problems such as the one from the subject of this advisory have passed
    these vulnerabilities due to greater severity.

     - esound, xchat, gnorpm, xpdf

        These packages are known to exhibit file race conditions. We will
        provide update packages soon.

     - pine

        The pine Mail User Agent may crash when it encounters a specially
        crafted header line in an email. Again, we're working on a patch.

______________________________________________________________________________

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>.
    ===============================================

Regards,
Roman Drahtmüller.
- - --
 -                                                                      -
| Roman Drahtmüller      <draht () suse de> //          "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 <security () suse de>

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