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[USN-3279-1] Apache HTTP Server vulnerabilities

Posted on 09 May 2017
Ubuntu Security

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Ubuntu Security Notice USN-3279-1
May 09, 2017

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

- Ubuntu 16.10
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in Apache HTTP Server.

Software Description:
- apache2: Apache HTTP server

Details:

It was discovered that the Apache mod_session_crypto module was encryptin=
g
data and cookies using either CBC or ECB modes. A remote attacker could
possibly use this issue to perform padding oracle attacks. (CVE-2016-0736=
)

Maksim Malyutin discovered that the Apache mod_auth_digest module
incorrectly handled malicious input. A remote attacker could possibly use=

this issue to cause Apache to crash, resulting in a denial of service.
(CVE-2016-2161)

David Dennerline and R=C3=A9gis Leroy discovered that the Apache HTTP Ser=
ver
incorrectly handled unusual whitespace when parsing requests, contrary to=

specifications. When being used in combination with a proxy or backend
server, a remote attacker could possibly use this issue to perform an
injection attack and pollute cache. This update may introduce compatibili=
ty
issues with clients that do not strictly follow HTTP protocol
specifications. A new configuration option "HttpProtocolOptions Unsafe" c=
an
be used to revert to the previous unsafe behaviour in problematic
environments. (CVE-2016-8743)

Update instructions:

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

Ubuntu 16.10:
apache2-bin 2.4.18-2ubuntu4.1

Ubuntu 16.04 LTS:
apache2-bin 2.4.18-2ubuntu3.2

Ubuntu 14.04 LTS:
apache2-bin 2.4.7-1ubuntu4.14

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


References:
http://www.ubuntu.com/usn/usn-3279-1
CVE-2016-0736, CVE-2016-2161, CVE-2016-8743

Package Information:
https://launchpad.net/ubuntu/+source/apache2/2.4.18-2ubuntu4.1
https://launchpad.net/ubuntu/+source/apache2/2.4.18-2ubuntu3.2
https://launchpad.net/ubuntu/+source/apache2/2.4.7-1ubuntu4.14



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