cURL and libcurl 7.10.6 through 7.41.0 do not properly re-use authenticated Negotiate connections, which allows remote attackers to connect as other users via a request.
https://support.apple.com/kb/HT205031
https://security.gentoo.org/glsa/201509-02
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05045763
http://www.ubuntu.com/usn/USN-2591-1
http://www.securitytracker.com/id/1032232
http://www.securityfocus.com/bid/74301
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html
http://www.mandriva.com/security/advisories?name=MDVSA-2015:220
http://www.mandriva.com/security/advisories?name=MDVSA-2015:219
http://www.debian.org/security/2015/dsa-3232
http://rhn.redhat.com/errata/RHSA-2015-1254.html
http://marc.info/?l=bugtraq&m=145612005512270&w=2
http://lists.opensuse.org/opensuse-updates/2015-04/msg00057.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-May/157188.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-May/157017.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-May/156945.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-April/156250.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155957.html
http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10743