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CVE Vulnerabilities

CVE-2019-3878

Authentication Bypass by Primary Weakness

Published: Mar 26, 2019 | Modified: Nov 21, 2024
CVSS 3.x
8.1
HIGH
Source:
NVD
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
6.8 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
8.1 IMPORTANT
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2019-3878
CWEhttps://cwe.mitre.org/data/definitions/305.html

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.

Weakness

The authentication algorithm is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error.

Affected Software

NameVendorStart VersionEnd Version
Mod_auth_mellonMod_auth_mellon_project*0.14.2 (excluding)
Red Hat Enterprise Linux 7RedHatmod_auth_mellon-0:0.14.0-2.el7_6.4*
Red Hat Enterprise Linux 8RedHatmod_auth_mellon-0:0.14.0-3.el8_0.2*
Red Hat Software Collections for Red Hat Enterprise Linux 6RedHathttpd24-httpd-0:2.4.34-7.el6.1*
Red Hat Software Collections for Red Hat Enterprise Linux 7RedHathttpd24-httpd-0:2.4.34-7.el7.1*
Red Hat Software Collections for Red Hat Enterprise Linux 7RedHathttpd24-mod_auth_mellon-0:0.13.1-2.el7.1*
Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSRedHathttpd24-httpd-0:2.4.34-7.el7.1*
Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSRedHathttpd24-mod_auth_mellon-0:0.13.1-2.el7.1*
Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSRedHathttpd24-httpd-0:2.4.34-7.el7.1*
Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSRedHathttpd24-mod_auth_mellon-0:0.13.1-2.el7.1*
Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSRedHathttpd24-httpd-0:2.4.34-7.el7.1*
Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSRedHathttpd24-mod_auth_mellon-0:0.13.1-2.el7.1*
Libapache2-mod-auth-mellonUbuntubionic*
Libapache2-mod-auth-mellonUbuntucosmic*
Libapache2-mod-auth-mellonUbuntudevel*
Libapache2-mod-auth-mellonUbuntudisco*
Libapache2-mod-auth-mellonUbuntueoan*
Libapache2-mod-auth-mellonUbuntuesm-apps/xenial*
Libapache2-mod-auth-mellonUbuntuesm-infra/bionic*
Libapache2-mod-auth-mellonUbuntuesm-infra/focal*
Libapache2-mod-auth-mellonUbuntufocal*
Libapache2-mod-auth-mellonUbuntugroovy*
Libapache2-mod-auth-mellonUbuntutrusty*
Libapache2-mod-auth-mellonUbuntuxenial*

References

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