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                         AUSCERT Security Bulletin

                               ASB-2009.1071
             f5 releases HotFixes for Multiple BIG-IP versions
                             2 September 2009

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

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

Product:              BIG-IP 10.0.0
                      BIG-IP 9.4.7
                      BIG-IP 9.4.6
                      BIG-IP 9.4.5
Operating System:     Network Appliance
Impact/Access:        Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                      Denial of Service               -- Remote/Unauthenticated
Resolution:           Patch/Upgrade
CVE Names:            CVE-2009-0696 CVE-2009-0584 CVE-2009-0583
                      CVE-2009-0040  
Member content until: Friday, October  2 2009
Reference:            ASB-2009.1033
                      AA-2009.0107

OVERVIEW

        f5 have released a number of HotFixes for BIG-IP correcting a number
        of security vulnerabilities.


IMPACT

        The vendor has provided the following information regarding these
        HotFixes and their associated vulnerabilities:
        
        libpng vulnerability CVE-2009-0040
        
        "The PNG reference library (libpng), as used in pngcrush and other 
        applications, allows context-dependent attackers to cause a denial 
        of service (application crash) or possibly execute arbitrary code 
        via a crafted PNG file that triggers a free of an uninitialized 
        pointer." [1]
        
        icclib vulnerabilities CVE-2009-0583, and CVE-2009-0584
        
        "Multiple integer overflow flaws which could lead to heap-based 
        buffer overflows, as well as multiple insufficient input validation 
        flaws, were found in Ghostscript's International Color Consortium 
        Format library (icclib). Using specially-crafted ICC profiles, an 
        attacker could create a malicious PostScript or PDF file with 
        embedded images which could cause Ghostscript to crash, or, 
        potentially, execute arbitrary code when opened by the victim." [2]
        
        BIG-IP ASM and PSM remote buffer overflow exploit
        
        "The BIG-IP Application Security Manager (ASM) and Protocol 
        Security Manager (PSM) bd daemon is vulnerable to a remote buffer 
        overflow which may cause the system to crash and dump core." [3]
        
        BIND vulnerability CVE-2009-0696
        
        "F5 Networks has determined BIG-IP GTM software is vulnerable to 
        the malicious dynamic update message described in CVE-2009-0696. 
        This vulnerability is mitigated by the fact that BIND will 
        immediately restart after the crash. However, an attacker could 
        sustain an outage by continuing to send malicious packets." [4]


MITIGATION

        BIG-IP version 10.0.0 HF3 corrects the libpng, icclib and ASM/PSM
        buffer overflow vulnerabilities.
        
        BIG-IP version 9.4.7 HF2 corrects the BIND and ASM/PSM buffer 
        overflow vulnerabilities.
        
        BIG-IP version 9.4.6 HF3 corrects the BIND and ASM/PSM buffer 
        overflow vulnerabilities.
        
        BIG-IP version 9.4.5 HF3 corrects BIND vulnerability.
        
        These HotFixes are available for download from the vendor's 
        website. [5]


REFERENCES

        [1] SOL9988: libpng vulnerability CVE-2009-0040
            https://support.f5.com/kb/en-us/solutions/public/9000/900/sol9988.html

        [2] SOL9990: icclib vulnerabilities CVE-2009-0583, and CVE-2009-0584
            https://support.f5.com/kb/en-us/solutions/public/9000/900/sol9990.html

        [3] SOL10417: BIG-IP ASM and PSM remote buffer overflow exploit
            https://support.f5.com/kb/en-us/solutions/public/10000/400/sol10417.html

        [4] SOL10366: BIND vulnerability - CVE-2009-0696
            https://support.f5.com/kb/en-us/solutions/public/10000/300/sol10366.html

        [5] F5 - Downloads
            https://downloads.f5.com/esd/productlines.jsp

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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