The RuntimeEventRouter::OnExtensionUninstalled function in extensions/browser/api/runtime/runtime_api.cc in Google Chrome before 45.0.2454.85 does not ensure that the setUninstallURL preference corresponds to the URL of a web site, which allows user-assisted remote attackers to trigger access to an arbitrary URL via a crafted extension that is uninstalled.
https://security.gentoo.org/glsa/201603-09
https://codereview.chromium.org/1282263002/
https://code.google.com/p/chromium/issues/detail?id=518827
http://www.securitytracker.com/id/1033472
http://www.debian.org/security/2015/dsa-3351
http://rhn.redhat.com/errata/RHSA-2015-1712.html
http://lists.opensuse.org/opensuse-updates/2015-11/msg00013.html
http://lists.opensuse.org/opensuse-updates/2015-09/msg00029.html
http://googlechromereleases.blogspot.com/2015/09/stable-channel-update.html