Public Date:
1695020: CVE-2019-0217 httpd: mod_auth_digest: access control bypass due to race condition
A race condition was found in mod_auth_digest when the web server was running in a threaded MPM configuration. It could allow a user with valid credentials to authenticate using another username, bypassing configured access control restrictions.

Find out more about CVE-2019-0217 from the MITRE CVE dictionary dictionary and NIST NVD.


Based on the the fact that digest authentication is rarely used in modern day web applications and httpd package shipped with Red Hat products do not ship threaded MPM configuration by default, this flaw has been rated as having Moderate level security impact. Red Hat Enterprise Linux 6 is now in Maintenance Support 2 Phase of the support and maintenance life cycle. This flaw has been rated as having a security impact of Moderate, and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle:

CVSS v3 metrics

NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.

CVSS3 Base Score 7.1
CVSS3 Base Metrics CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity Impact High
Availability Impact None

Affected Packages State

Platform Package State
Red Hat Virtualization 4 rhvm-appliance Not affected
Red Hat Software Collections for Red Hat Enterprise Linux httpd24-httpd Affected
Red Hat JBoss EWS 2 httpd Under investigation
Red Hat JBoss Core Services 1 httpd Affected
Red Hat Enterprise Linux 8 httpd:2.4/httpd Affected
Red Hat Enterprise Linux 7 httpd Affected
Red Hat Enterprise Linux 6 httpd Out of support scope
Red Hat Enterprise Linux 5 httpd Under investigation


This flaw only affects a threaded server configuration, so using the prefork MPM is an effective mitigation. In versions of httpd package shipped with Red Hat Enterprise Linux 7, the prefork MPM is the default configuration.

External References

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