Improper Authentication Affecting libapache2-mod-auth-mellon package, versions <0.14.2-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-LIBAPACHE2MODAUTHMELLON-341040
- published22 Mar 2019
- disclosed26 Mar 2019
Introduced: 22 Mar 2019
CVE-2019-3878 (opens in a new tab)How to fix?
Upgrade Debian:unstable libapache2-mod-auth-mellon to version 0.14.2-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libapache2-mod-auth-mellon package and not the libapache2-mod-auth-mellon package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2019-3878
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CNW5YMC5TLWVWNJEY6AIWNSNPRAMWPQJ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X7NLAU7KROWNTHAYSA2S67X347F42L2I/
- https://github.com/Uninett/mod_auth_mellon/pull/196
- https://access.redhat.com/errata/RHBA-2019:0959
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3878
- https://access.redhat.com/errata/RHSA-2019:0746
- https://access.redhat.com/errata/RHSA-2019:0766
- https://access.redhat.com/errata/RHSA-2019:0985
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2019-3878
- https://usn.ubuntu.com/3924-1/
- 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/