DSA-2271-1 curl -- improper delegation of client credentials

Debian Security Advisory

DSA-2271-1 curl -- improper delegation of client credentials

Date Reported:

02 Jul 2011

Affected Packages:

curl

Vulnerable:

Yes

Security database references:

In Mitre's CVE dictionary: CVE-2011-2192.

More information:

Richard Silverman discovered that 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 very sensitive operation, which should only be done when the user explicitly so directs.

For the oldstable distribution (lenny), this problem has been fixed in version 7.18.2-8lenny5.

For the stable distribution (squeeze), this problem has been fixed in version 7.21.0-2.

For the testing distribution (wheezy), this problem has been fixed in version 7.21.6-2.

For the unstable distribution (sid), this problem has been fixed in version 7.21.6-2.

We recommend that you upgrade your curl packages.