VulnerabilityModified
CVE-2019-3878
A vulnerability was found in mod_auth_mellon before v0.14.2.
HIGH 8.1EPSS 2.97%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.97%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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 HIGHCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.97% probability · 86th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-305, CWE-287
- Affected
- mod auth mellon project/mod auth mellon · fedoraproject/fedora · redhat/enterprise linux · redhat/enterprise linux desktop · redhat/enterprise linux server · redhat/enterprise linux server aus · redhat/enterprise linux server eus · redhat/enterprise linux server tus · redhat/enterprise linux workstation · canonical/ubuntu linux
- Source
- secalert@redhat.com
References
- https://access.redhat.com/errata/RHBA-2019:0959
- https://access.redhat.com/errata/RHSA-2019:0746Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0766Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0985
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3878Issue Tracking, Patch, Third Party Advisory
- https://github.com/Uninett/mod_auth_mellon/pull/196Exploit, Patch, Third Party Advisory
- 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/Third Party Advisory
- https://access.redhat.com/errata/RHBA-2019:0959
- https://access.redhat.com/errata/RHSA-2019:0746Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0766Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0985
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3878Issue Tracking, Patch, Third Party Advisory
- https://github.com/Uninett/mod_auth_mellon/pull/196Exploit, Patch, Third Party Advisory
- 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/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.