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Ubuntu Security Notice USN-2686-1
July 27, 2015

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

- Ubuntu 15.04
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

Several security issues were fixed in the Apache HTTP server.

Software Description:
- apache2: Apache HTTP server

Details:

It was discovered that the Apache HTTP Server incorrectly parsed chunk
headers. A remote attacker could possibly use this issue to perform HTTP
request smuggling attacks. (CVE-2015-3183)

It was discovered that the Apache HTTP Server incorrectly handled the
ap_some_auth_required API. A remote attacker could possibly use this issue
to bypass intended access restrictions. This issue only affected Ubuntu
14.04 LTS and Ubuntu 15.04. (CVE-2015-3185)

Update instructions:

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

Ubuntu 15.04:
  apache2.2-bin                   2.4.10-9ubuntu1.1

Ubuntu 14.04 LTS:
  apache2.2-bin                   2.4.7-1ubuntu4.5

Ubuntu 12.04 LTS:
  apache2.2-bin                   2.2.22-1ubuntu1.10

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

References:
  http://www.ubuntu.com/usn/usn-2686-1
  CVE-2015-3183, CVE-2015-3185

Package Information:
  https://launchpad.net/ubuntu/+source/apache2/2.4.10-9ubuntu1.1
  https://launchpad.net/ubuntu/+source/apache2/2.4.7-1ubuntu4.5
  https://launchpad.net/ubuntu/+source/apache2/2.2.22-1ubuntu1.10