Debian Security Advisory

DSA-4414-1 libapache2-mod-auth-mellon -- security update

Date Reported:
23 Mar 2019
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 925197.
In Mitre's CVE dictionary: CVE-2019-3877, CVE-2019-3878.
More information:

Several issues have been discovered in Apache module auth_mellon, which provides SAML 2.0 authentication.

  • CVE-2019-3877

    It was possible to bypass the redirect URL checking on logout, so the module could be used as an open redirect facility.

  • CVE-2019-3878

    When mod_auth_mellon is used in an Apache configuration which serves as a remote proxy with the http_proxy module, it was possible to bypass authentication by sending SAML ECP headers.

For the stable distribution (stretch), these problems have been fixed in version 0.12.0-2+deb9u1.

We recommend that you upgrade your libapache2-mod-auth-mellon packages.

For the detailed security status of libapache2-mod-auth-mellon please refer to its security tracker page at: