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Date: Mon, 01 Apr 2019 20:31:27 -0500
From: Daniel Ruggeri <>
Subject: CVE-2019-0220: URL normalization inconsistincies

CVE-2019-0220: URL normalization inconsistincies

Severity: Low

Vendor: The Apache Software Foundation

Versions Affected:
httpd 2.4.0 to 2.4.39

When the path component of a request URL contains multiple consecutive slashes
('/'), directives such as LocationMatch and RewriteRule must account for
duplicates in regular expressions while other aspects of the servers processing
will implicitly collapse them.
Regular expressions used in directives that match against the path component
of the request URL can be modified to account for multiple consecutive slashes.

The issue was discovered by Bernhard Lorenz <> 
of Alpha Strike Labs GmbH".


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