ALAS-2019-1200


Amazon Linux AMI Security Advisory: ALAS-2019-1200
Advisory Release Date: 2019-05-06 17:51 Pacific
Severity: Important

Issue Overview:

A vulnerability was found in mod_auth_mellon. 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. (CVE-2019-3878 )

A vulnerability was found in mod_auth_mellon where 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. (CVE-2019-3877 )


Affected Packages:

mod24_auth_mellon


Issue Correction:
Run yum update mod24_auth_mellon to update your system.

New Packages:
i686:
    mod24_auth_mellon-diagnostics-0.14.0-2.8.amzn1.i686
    mod24_auth_mellon-debuginfo-0.14.0-2.8.amzn1.i686
    mod24_auth_mellon-0.14.0-2.8.amzn1.i686

src:
    mod24_auth_mellon-0.14.0-2.8.amzn1.src

x86_64:
    mod24_auth_mellon-diagnostics-0.14.0-2.8.amzn1.x86_64
    mod24_auth_mellon-debuginfo-0.14.0-2.8.amzn1.x86_64
    mod24_auth_mellon-0.14.0-2.8.amzn1.x86_64