A vulnerability has be found in Splunk 4.0 - 4.3 that allows partial confidentiality and integrity violation, when a user click on a specifically crafted link that can disclose sensitive information to the attacker. Splunk recommend consumers upgrade to version 4.3.1 and to follow its hardening standard [3] to mitigate the risk of exploitation.

[1] http://www.splunk.com/view/SP-CAAAGTK
[2] http://www.splunk.com/download
[3] http://docs.splunk.com/Documentation/Splunk/latest/Admin/Hardeningstandards

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Guy Bruneau IPSS Inc. gbruneau at isc dot sans dot edu