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AUSCERT External Security Bulletin Redistribution
ESB-2017.1174
Apache HTTP Server vulnerabilities
10 May 2017
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AusCERT Security Bulletin Summary
---------------------------------
Product: apache2
Publisher: Ubuntu
Operating System: Linux variants
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Provide Misleading Information -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2016-8743 CVE-2016-2161 CVE-2016-0736
Reference: ASB-2017.0058
ASB-2017.0021
ASB-2017.0014
ESB-2017.1046
ESB-2017.0127
Original Bulletin:
http://www.ubuntu.com/usn/usn-3279-1
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Ubuntu Security Notice USN-3279-1
May 09, 2017
apache2 vulnerabilities
==========================================================================
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 encrypting
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 Régis Leroy discovered that the Apache HTTP Server
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 compatibility
issues with clients that do not strictly follow HTTP protocol
specifications. A new configuration option "HttpProtocolOptions Unsafe" can
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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