High severity · published Mar 26, 2019
CVE-2019-3878
A vulnerability was found in mod_auth_mellon before v0.14.2
8.1
CVSS
3%
EPSS
No
On KEV
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 vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.0% · higher than 87% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EL
Enterprise Linux · Redhat
7.0 · source: NVD
EL
Enterprise Linux Desktop · Redhat
7.0 · source: NVD
EL
Enterprise Linux Server · Redhat
7.0 · source: NVD
EL
Enterprise Linux Server Aus · Redhat
7.6 · source: NVD
EL
Enterprise Linux Server Eus · Redhat
7.6 · source: NVD
EL
Enterprise Linux Server Tus · Redhat
7.6 · source: NVD
EL
Enterprise Linux Workstation · Redhat
7.0 · source: NVD
FE
Fedora · Fedoraproject
29; 30 · source: NVD
MA
Mod Auth Mellon · Mod Auth Mellon Project
before 0.14.2 · source: NVD
UL
Ubuntu Linux · Canonical
18.04; 18.10 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-3878
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-3878
access.redhat.com
https://access.redhat.com/errata/RHBA-2019:0959
Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0746
Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0766
access.redhat.com
https://access.redhat.com/errata/RHSA-2019:0985
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3878
Exploit
https://github.com/Uninett/mod_auth_mellon/pull/196
More from Ubuntu Linux
9.8
CVE-2020-11651
SaltStack Salt Authentication Bypass Vulnerability
9.8
CVE-2020-7247
OpenSMTPD Remote Code Execution Vulnerability
9.8
CVE-2019-11043
Underflow in PHP-FPM can lead to RCE
9.8
CVE-2019-16928
Exim Out-of-bounds Write Vulnerability
9.8
CVE-2019-10149
Exim Mail Transfer Agent (MTA) Improper Input Validation