It was found that cURL performed client credentials delegation during the
client-to-server GSS security mechanisms negotiation. A remote, rogue
server could use this flaw to impersonate the cURL client (victim) against
the correct (originally intended) server, potentially leading to denial
of cURL tool services for victim client.
This issue affects the versions of the curl package, as shipped with
Red Hat Enterprise Linux 4, 5, and 6.
--
This issue affects the versions of the curl package, as shipped with
Fedora release of 13, 14, and 15.
This issue has been addressed in following products:
Red Hat Enterprise Linux 4
Red Hat Enterprise Linux 5
Red Hat Enterprise Linux 6
Via RHSA-2011:0918 https://rhn.redhat.com/errata/RHSA-2011-0918.html