-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

===========================================================================
                         AUSCERT Security Bulletin

                               ASB-2009.1081
         Interim fix resolving multiple Denial of services issues
                       released for IBM HTTP Server
                             14 September 2009

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:              IBM HTTP Server 6.0.2
                      IBM HTTP Server 6.1
                      IBM HTTP Server 7.0
Operating System:     AIX
                      HP-UX
                      Linux variants
                      Solaris
                      Windows
Impact/Access:        Denial of Service -- Remote/Unauthenticated
Resolution:           Patch/Upgrade
CVE Names:            CVE-2009-0023 CVE-2009-1955 CVE-2009-1956
                      CVE-2009-1890 CVE-2009-1891 
Member content until: Wednesday, October 14 2009
Reference:            ESB-2009.0532
                      ESB-2009.1036

OVERVIEW

        IBM has released an interim fix resolving multiple Denial of Service
        issues in the IBM HTTP Server.


IMPACT

        IBM has made the following statement:
        
        "This interim fix resolves the following:
        
        ERROR DESCRIPTION:
        CVE-2009-0023 - Underflow in apr_strmatch_precompile
        CVE-2009-1956 - apr_brigade_vprintf off-by-one overflow vulnerability
        CVE-2009-1955 - apr_xml_* interface DoS vulnerability
        CVE-2009-1891 - mod_deflate DoS vulnerability
        CVE-2009-1890 - mod_proxy_http 100% CPU DoS (7.0 versions only)" [1]


MITIGATION

        IBM states:
        
          "We recommend installing this interim fix on at least 6.0.2.35,
          6.1.0.25, 7.0.0.5" [1]


REFERENCES

        [1] IBM HTTP Server interim fix for PK91361
            http://www-01.ibm.com/support/docview.wss?uid=swg24023947

AusCERT has made every effort to ensure that the information contained
in this document is accurate.  However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.

If you believe that your computer system has been compromised or attacked in 
any way, we encourage you to let us know by completing the secure National IT 
Incident Reporting Form at:

        http://www.auscert.org.au/render.html?it=3192

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours 
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967

iD8DBQFKrcl2NVH5XJJInbgRAkTGAJwIg+UhnHcDL+MzLd51AwerNYMoQwCaA0we
3CL51okz5l/Gg/KEHHo5PvA=
=FUF1
-----END PGP SIGNATURE-----