When doing GSSAPI authentication, libcurl unconditionally performs credential delegation. This hands the server a copy of the client's security credentials, allowing the server to impersonate the client to any other using the same GSSAPI mechanism. This is obviously a sensitive operation, which should only be done when the user explicitly so directs.
The GSS/Negotiate feature is only used by libcurl for HTTP authentication if told to, and only if libcurl was built with a library that provides the GSSAPI. Many builds of libcurl do not have GSS enabled.
{
"CWE": {
"id": "CWE-281",
"desc": "Improper Preservation of Permissions"
},
"severity": "Medium",
"last_affected": "7.21.6",
"affects": "both",
"www": "https://curl.se/docs/CVE-2011-2192.html",
"URL": "https://curl.se/docs/CVE-2011-2192.json",
"package": "curl"
}