Vulnerability Details CVE-2019-3878
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.032
EPSS Ranking 86.4%
CVSS Severity
CVSS v3 Score 8.1
CVSS v2 Score 6.8
References
- https://access.redhat.com/errata/RHBA-2019:0959
- https://access.redhat.com/errata/RHSA-2019:0746
- https://access.redhat.com/errata/RHSA-2019:0766
- https://access.redhat.com/errata/RHSA-2019:0985
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3878
- https://github.com/Uninett/mod_auth_mellon/pull/196
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CNW5YMC5TLWVWNJEY6AIWNSNPRAMWPQJ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X7NLAU7KROWNTHAYSA2S67X347F42L2I/
- https://usn.ubuntu.com/3924-1/
- https://access.redhat.com/errata/RHBA-2019:0959
- https://access.redhat.com/errata/RHSA-2019:0746
- https://access.redhat.com/errata/RHSA-2019:0766
- https://access.redhat.com/errata/RHSA-2019:0985
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3878
- https://github.com/Uninett/mod_auth_mellon/pull/196
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CNW5YMC5TLWVWNJEY6AIWNSNPRAMWPQJ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X7NLAU7KROWNTHAYSA2S67X347F42L2I/
- https://usn.ubuntu.com/3924-1/
Products affected by CVE-2019-3878
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cpe:2.3:a:mod_auth_mellon_project:mod_auth_mellon:0.10.0
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cpe:2.3:a:mod_auth_mellon_project:mod_auth_mellon:0.11.0
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cpe:2.3:a:mod_auth_mellon_project:mod_auth_mellon:0.11.1
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cpe:2.3:a:mod_auth_mellon_project:mod_auth_mellon:0.12.0
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cpe:2.3:a:mod_auth_mellon_project:mod_auth_mellon:0.13.0
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cpe:2.3:a:mod_auth_mellon_project:mod_auth_mellon:0.13.1
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cpe:2.3:a:mod_auth_mellon_project:mod_auth_mellon:0.14.0
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cpe:2.3:a:mod_auth_mellon_project:mod_auth_mellon:0.14.1
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cpe:2.3:a:mod_auth_mellon_project:mod_auth_mellon:0.4.0
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cpe:2.3:a:mod_auth_mellon_project:mod_auth_mellon:0.5.0
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cpe:2.3:a:mod_auth_mellon_project:mod_auth_mellon:0.6.0
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cpe:2.3:a:mod_auth_mellon_project:mod_auth_mellon:0.6.1
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cpe:2.3:a:mod_auth_mellon_project:mod_auth_mellon:0.7.0
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cpe:2.3:a:mod_auth_mellon_project:mod_auth_mellon:0.8.0
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cpe:2.3:a:mod_auth_mellon_project:mod_auth_mellon:0.8.1
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cpe:2.3:a:mod_auth_mellon_project:mod_auth_mellon:0.9.0
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cpe:2.3:a:mod_auth_mellon_project:mod_auth_mellon:0.9.1
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cpe:2.3:o:canonical:ubuntu_linux:18.04
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cpe:2.3:o:canonical:ubuntu_linux:18.10
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cpe:2.3:o:fedoraproject:fedora:29
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cpe:2.3:o:fedoraproject:fedora:30
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cpe:2.3:o:redhat:enterprise_linux:7.0
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cpe:2.3:o:redhat:enterprise_linux_desktop:7.0
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cpe:2.3:o:redhat:enterprise_linux_server:7.0
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cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6
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cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6
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cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6
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cpe:2.3:o:redhat:enterprise_linux_workstation:7.0