[USN-3370-2] Apache HTTP Server vulnerability

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Ubuntu Security Notice USN-3370-2
August 01, 2017

apache2 vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 ESM

Summary:

Apache HTTP Server could be made to crash or leak sensitive information
if it received specially crafted network traffic.

Software Description:
- apache2: Apache HTTP server

Details:

USN-3370-1 fixed a vulnerability in Apache HTTP Server.
This update provides the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

 Robert Święcki discovered that the Apache HTTP Server mod_auth_digest
 module incorrectly cleared values when processing certain requests. A
 remote attacker could use this issue to cause the server to crash,
 resulting in a denial or service, or possibly obtain sensitive
 information.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 12.04 ESM:
  apache2.2-bin                   2.2.22-1ubuntu1.13

In general, a standard system update will make all the necessary
changes.

References:
  https://www.ubuntu.com/usn/usn-3370-2
  https://www.ubuntu.com/usn/usn-3370-1
  CVE-2017-9788