WordPress: Unauthorised Access -- Remote/Unauthenticated

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

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

                               ASB-2013.0002
    WordPress 3.4.2: Sessions not terminated upon explicit user logout
                              4 January 2013

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

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

Product:              WordPress
Operating System:     Windows
                      UNIX variants (UNIX, Linux, OSX)
Impact/Access:        Unauthorised Access -- Remote/Unauthenticated
Resolution:           Patch/Upgrade
CVE Names:            CVE-2012-5868  
Member content until: Sunday, February  3 2013

OVERVIEW

        A vulnerability has been identified in WordPress 3.4.2 and prior. [1]


IMPACT

        National Vulnerability Database provides the following information:
        
        "WordPress 3.4.2 does not invalidate a wordpress_sec session cookie 
        upon an administrator's logout action, which makes it easier for 
        remote attackers to discover valid session identifiers via a brute-
        force attack, or modify data via a replay attack." [1]


MITIGATION

        Version 3.5 is available from the vendor to address this issue. [2]


REFERENCES

        [1] Vulnerability Summary for CVE-2012-5868
            http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2012-5868

        [2] WordPress 3.5 "Elvin"
            http://wordpress.org/news/2012/12/elvin/

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.

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

iQIVAwUBUOZRqu4yVqjM2NGpAQIQEg/+OMRVMgPy41k2HAMDP5MQ9zN5H55/ji1D
5dxrKv9DeEjZ9ijU45cci/UVf/DGpWJj5zL1E11OFfG8dyNt57BSDBIBcG1RaFKp
Lh6K90NEGmcseSd+nMCj6fJ7Q//qVtG5Z/nfeFZEvRLGazpgq/E3rlrs35Ux4Bsj
JSg/giYJywv+5Jp9xDi+8GGcIZgWyjBfYvyCQgw+b96AAI2BXrgu3CTxRKY/Xr7M
Wx1ZDZWIiof2SSrMsdlQKGv7e0PdjvscDKOFMG/tanxL63XgZPbfLSLIx/Gth1+n
jDKMcv+SLWsmil6DzK++4CykgARXDnNUwrMQswdDEuzyyHu9YalXN+7i3QQ4cSSt
ckj7b0L88qIbSZxc0mL/swqEqdbiyojoxS12mL2dmh/3FSPoc/xz0oaK70ZygI5a
SCKN56xRiNXaGmnGS0FeX/8upiF/Fs83h3Q5aU/tu4BC3oOP1mcx4oJAux4tFJD7
3boAmRlXHCb7boQ0lOreAhumrz+//Orti3ap8TY5kb80D3l8VP/VRcTRS9rHGgDk
3Qo8EqQSuxba2ivzj1RYAZk9yy3ky+/nrFk9bshCWMbcZuhJtEuUGqotgNoFEfMk
AHApWIn5k46N0Q7+nNfHUgvDhbbHn/TJMz4ZXTP5yew4vycIpZA9ZQqo15YKKz7r
5r8xl1ndLwY=
=wiWp
-----END PGP SIGNATURE-----