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Date: Mon, 10 Apr 2017 20:14:45 +0100
From: Mark Thomas <>
Subject: [SECURITY] CVE-2017-5647 Apache Tomcat Information Disclosure

CVE-2017-5647 Apache Tomcat Information Disclosure

Severity: Important

Vendor: The Apache Software Foundation

Versions Affected:
Apache Tomcat 9.0.0.M1 to 9.0.0.M18
Apache Tomcat 8.5.0 to 8.5.12
Apache Tomcat 8.0.0.RC1 to 8.0.42
Apache Tomcat 7.0.0 to 7.0.76
Apache Tomcat 6.0.0 to 6.0.52

A bug in the handling of the pipelined requests when send file was used
resulted in the pipelined request being lost when send file processing
of the previous request completed. This could result in responses
appearing to be sent for the wrong request. For example, a user agent
that sent requests A, B and C could see the correct response for request
A, the response for request C for request B and no response for request C.

Users of the affected versions should apply one of the following
- Switch to the BIO HTTP where available
- Disable send file
- Upgrade to Apache Tomcat 9.0.0.M19 or later
- Upgrade to Apache Tomcat 8.5.13 or later
- Upgrade to Apache Tomcat 8.0.43 or later
- Upgrade to Apache Tomcat 7.0.77 or later
- Upgrade to Apache Tomcat 6.0.53 or later

This issue was identified by the Tomcat security team.

2017-04-10 Original advisory


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