The OneClickSigninHelper::ShowInfoBarIfPossible function in browser/ui/sync/one_click_signin_helper.cc in Google Chrome before 31.0.1650.63 uses an incorrect URL during realm validation, which allows remote attackers to conduct session fixation attacks and hijack web sessions by triggering improper sync after a 302 (aka Found) HTTP status code.
googlechromereleases.blogspot.com/2013/12/stable-channel-update.html
lists.opensuse.org/opensuse-updates/2013-12/msg00090.html
lists.opensuse.org/opensuse-updates/2013-12/msg00096.html
lists.opensuse.org/opensuse-updates/2014-01/msg00042.html
secunia.com/advisories/56217
www.debian.org/security/2013/dsa-2811
www.securitytracker.com/id/1029442
code.google.com/p/chromium/issues/detail?id=307159
src.chromium.org/viewvc/chrome?revision=236563&view=revision