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                         AUSCERT Security Bulletin

                               ASB-2009.1016
                             AIX vulnerability
                               16 July 2009

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

Product:              IBM AIX
Operating System:     AIX
Impact/Access:        Execute Arbitrary Code/Commands -- Existing Account
                      Denial of Service               -- Existing Account
Resolution:           Patch
CVE Names:            CVE-2009-2434  
Member content until: Saturday, August 15 2009

OVERVIEW

        IBM have confirmed a buffer overflow vulnerability in AIX 5.x 
        and 6.x.


IMPACT

        The vendor has provided the following details regarding this 
        vulnerability:
        
        "IBM AIX is vulnerable to a buffer overflow, caused by improper 
        bounds checking by the syscall functionality. By using unknown 
        attack vectors, a local attacker could overflow a buffer and 
        execute arbitrary code on the system or cause the application 
        to crash." [1]


MITIGATION

        The vendor recommends referring to IBM APARs IZ54713 and IZ54714 
        for patches, upgrades and workarounds. [1]


REFERENCES

        [1] ibm-aix-syscall-bo (51612)
            http://xforce.iss.net/xforce/xfdb/51612

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.
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