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

===========================================================================
AA-2007.0105                  AUSCERT Advisory

                                  [Linux]
                   Linux Kernel CIFS VFS Buffer Overflow
                             19 November 2007
- ---------------------------------------------------------------------------

        AusCERT Advisory Summary
        ------------------------

Product:              CIFS VFS in Linux kernel 2.6.23 and prior
Operating System:     Linux variants
Impact:               Execute Arbitrary Code/Commands
                      Denial of Service
Access:               Remote/Unauthenticated
CVE Names:            CVE-2007-5904
Member content until: Monday, December 17 2007


OVERVIEW:

        Due to multiple buffer overflows in CIFS VFS in Linux kernel
        2.6.23 and earlier, a remote attacker can cause a DOS and 
        possibly execute arbitrary code.


IMPACT:

        The National Vulnerability Database [1], gives the following
        information regarding this vulnerability:

        Multiple buffer overflows in CIFS VFS in Linux kernel 2.6.23 and 
        earlier allows remote attackers to cause a denial of service 
        (crash) and possibly execute arbitrary code via long SMB responses 
        that trigger the overflows in the SendReceive function. [2]
        

MITIGATION:

        This vulnerability has been fixed in the GIT repository. [3]


REFERENCES:

        [1] National Vulnerability Database
            http://nvd.nist.gov/

        [2] National Vulnerability Database (CVE-2007-5904)
            http://nvd.nist.gov/nvd.cfm?cvename=CVE-2007-5904

        [3] git.kernel.org
            http://git.kernel.org/?p=linux/kernel/git/sfrench/cifs-2.6.git;a=commit;h=133672efbc1085f9af990bdc145e1822ea93bcf3


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

iQCVAwUBR0E1Syh9+71yA2DNAQKTjgP/bYI02hPWSjoPsQoa3mlKqYDnehk5fkhd
vwfuxu5wD6Wp3ArS93Qfvs+X4d/pvK3a6eK1dWyYTp3ALfHxSpTQEYcrmQhpr4Rc
VcGHtboOSil0JinS+1hJ4n0pz7vh8JLKYB6NAfmz7OJvI8afAoUWLuPgFgF6xJ32
XII9CSkSaDE=
=0az6
-----END PGP SIGNATURE-----