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AA-2009.0030                  AUSCERT Advisory

                                  [Linux]
 Local Denial of Service (DoS) vulnerability corrected in the Linux Kernel
                             18 February 2009
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        AusCERT Advisory Summary
        ------------------------

Product:              kernel
Operating System:     Linux variants
Impact:               Denial of Service
Access:               Existing Account
CVE Names:            CVE-2009-0322
Member content until: Wednesday, March 18 2009

OVERVIEW:

       A vulnerability has been corrected in the Linux kernel versions
       2.6.27.13 and 2.6.28.2.


IMPACT:

       CVE-2009-0322 has been assigned to this vulnerability which describes
       it as:

       "drivers/firmware/dell_rbu.c in the Linux kernel before 2.6.27.13, 
       and 2.6.28.x before 2.6.28.2, allows local users to cause a denial of 
       service (system crash) via a read system call that specifies zero 
       bytes from the (1) image_type or (2) packet_size file in 
       /sys/devices/platform/dell_rbu/." [1]

       The fix has been noted in the changelog for these versions. [2] [3]


MITIGATION:

       Upgrade to 2.6.27.13, 2.6.28.2 or later.


REFERENCES:

       [1] Vulnerability Summary for CVE-2009-0322
           http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2009-0322

       [2] Kernel.org ChangeLog-2.6.28.2
           http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.28.2

       [3] Kernel.org ChangeLog-2.6.27.13
           http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.27.13
  
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

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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.
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