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CVE-2019-3878

mod_auth_mellon: authentication bypass in ECP flow

A vulnerability was found in mod_auth_mellon before v0.14.2. If Apache is configured as a reverse proxy and mod_auth_mellon is configured to only let through authenticated users (with the require valid-user directive), adding special HTTP headers that are normally used to start the special SAML ECP (non-browser based) can be used to bypass authentication.

CVSS 3.0 · 8.1 High EPSS 3.0% KEV · Not listed
Vendors
Canonical Fedoraproject Mod Auth Mellon Project and 1 more
Products
Ubuntu Linux Fedora Mod Auth Mellon and 8 more
CVE-2019-3877

mod_auth_mellon: open redirect in logout url when using URLs with backslashes

A vulnerability was found in mod_auth_mellon before v0.14.2. An open redirect in the logout URL allows requests with backslashes to pass through by assuming that it is a relative URL, while the browsers silently convert backslash characters into forward slashes treating them as an absolute URL. This mismatch allows an attacker to bypass the redirect URL validation logic in apr_uri_parse function.

CVSS 3.0 · 5.8 Medium EPSS 2.1% KEV · Not listed
Vendors
Canonical Fedoraproject Mod Auth Mellon Project and 1 more
Products
Ubuntu Linux Fedora Mod Auth Mellon and 1 more