[USN-3783-1] Apache HTTP Server vulnerabilities

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==========================================================================
Ubuntu Security Notice USN-3783-1
October 03, 2018

apache2 vulnerabilities
==========================================================================

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

- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in the Apache HTTP Server.

Software Description:
- apache2: Apache HTTP server

Details:

Robert Swiecki discovered that the Apache HTTP Server HTTP/2 module
incorrectly destroyed certain streams. A remote attacker could possibly
use this issue to cause the server to crash, leading to a denial of
service. (CVE-2018-1302)

Craig Young discovered that the Apache HTTP Server HTTP/2 module
incorrectly handled certain requests. A remote attacker could possibly
use this issue to cause the server to consume resources, leading to a
denial of service. (CVE-2018-1333)

Gal Goldshtein discovered that the Apache HTTP Server HTTP/2 module
incorrectly handled large SETTINGS frames. A remote attacker could possibly
use this issue to cause the server to consume resources, leading to a
denial of service. (CVE-2018-11763)

Update instructions:

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

Ubuntu 18.04 LTS:
apache2-bin 2.4.29-1ubuntu4.4

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

References:
https://usn.ubuntu.com/usn/usn-3783-1
CVE-2018-11763, CVE-2018-1302, CVE-2018-1333

Package Information:
https://launchpad.net/ubuntu/+source/apache2/2.4.29-1ubuntu4.4