The Hook_Terminate function in chrome_frame/protocol_sink_wrap.cc in the Google Chrome Frame plugin before 26.0.1410.28 for Internet Explorer does not properly handle attach tab requests, which allows user-assisted remote attackers to cause a denial of service (application crash) via an _blank value for the target attribute of an A element.
https://code.google.com/p/chromium/issues/detail?id=178415
https://chromiumcodereview.appspot.com/12395021
http://src.chromium.org/viewvc/chrome?view=rev&revision=185956
http://googlechromereleases.blogspot.com/2013/03/beta-channel-update.html