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Date: Mon, 01 Apr 2019 20:31:24 -0500
From: Daniel Ruggeri <>
Subject: CVE-2019-0217: mod_auth_digest access control bypass

CVE-2019-0217: mod_auth_digest access control bypass

Severity: important

Vendor: The Apache Software Foundation

Versions Affected:
httpd 2.4.0 to 2.4.38

In Apache HTTP Server 2.4 release 2.4.38 and prior, a race condition
in mod_auth_digest when running in a threaded server could allow a
user with valid credentials to authenticate using another username,
bypassing configured access control restrictions.

All httpd users deploying mod_auth_digest should upgrade to 2.4.39 or later.

The issue was discovered by Simon Kappel.


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