UBUNTU-CVE-2019-3878

Advisory lineage Upstream: 1 Downstream: 2
Upstream
CVE-2019-3878
Published: 21 Mar 2019, 00:00
Last modified:04 Feb 2026, 04:14

Vulnerability Summary

Overall Risk (default)
medium
32/100
CVSS Score
8.1 HIGH
3.0 (osv_ubuntu)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

21 Mar 2019, 00:00
Published
Vulnerability first disclosed
04 Feb 2026, 04:14
Last Modified
Vulnerability information updated

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 Metrics

  • v3.0•HIGH•Score: 8.1CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Affected Systems

  • ubuntu•libapache2-mod-auth-mellon

    < 0.12.0-2+deb9u1build0.16.04.1 | < 0.13.1-1ubuntu0.1 | < 0.14.2-1ubuntu1

References (5)