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Vulnerability of Apache httpd mod_lua: denial of service via WebSocket PING

Synthesis of the vulnerability 

An attacker can send a malicious PING message to Apache httpd using mod_lua with a WebSocket, in order to trigger a denial of service.
Vulnerable products: Apache httpd, Apache httpd Modules ~ not comprehensive, Fedora, openSUSE, Solaris, RHEL, Slackware, Ubuntu.
Severity of this weakness: 1/4.
Creation date: 05/03/2015.
Références of this bulletin: 918352, bulletinoct2015, CVE-2015-0228, FEDORA-2015-11689, FEDORA-2015-11792, MDVSA-2015:093, openSUSE-SU-2015:0418-1, RHSA-2015:1666-01, SSA:2015-198-01, USN-2523-1, VIGILANCE-VUL-16302.

Description of the vulnerability 

The mod_lua experimental module can be installed on Apache httpd, in order to create extensions based on the Lua language.

The r:wsupgrade() function converts a connection to a WebSocket. However, when a malicious PING message is received, a fatal error occurs in the lua_websocket_read() function.

An attacker can therefore send a malicious PING message to Apache httpd using mod_lua with a WebSocket, in order to trigger a denial of service.
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This cybersecurity threat impacts software or systems such as Apache httpd, Apache httpd Modules ~ not comprehensive, Fedora, openSUSE, Solaris, RHEL, Slackware, Ubuntu.

Our Vigil@nce team determined that the severity of this computer threat note is low.

The trust level is of type confirmed by the editor, with an origin of user account.

An attacker with a expert ability can exploit this security threat.

Solutions for this threat 

Apache httpd: version 2.4.16.
The version 2.4.16 is fixed:
  http://httpd.apache.org/download.cgi

Apache httpd mod_lua: patch for WebSocket PING.
A patch is available in information sources.

Fedora: new httpd packages.
New packages are available:
  Fedora 21: httpd 2.4.16-1.fc21
  Fedora 22: httpd 2.4.16-1.fc22

Mandriva BS2: new apache packages.
New packages are available:
  Mandriva BS2: apache 2.4.12-1.mbs2

openSUSE 13.2: new apache2 packages.
New packages are available:
  openSUSE 13.2: apache2 2.4.10-16.1

RHEL: new httpd24-httpd packages.
New packages are available:
  RHEL 6: httpd24-httpd 2.4.12-4.el6.2
  RHEL 7: httpd24-httpd 2.4.12-6.el7.1

Slackware: new httpd packages.
New packages are available:
  Slackware 14.0: httpd 2.4.16-*-1_slack14.0
  Slackware 14.1: httpd 2.4.16-*-1_slack14.1

Solaris: patch for Third Party (10/2015).
A patch is available:
  https://support.oracle.com/rs?type=doc&id=1448883.1

Ubuntu: new apache2.2-bin packages.
New packages are available:
  Ubuntu 14.10: apache2.2-bin 2.4.10-1ubuntu1.1
  Ubuntu 14.04 LTS: apache2.2-bin 2.4.7-1ubuntu4.4
  Ubuntu 12.04 LTS: apache2.2-bin 2.2.22-1ubuntu1.8
  Ubuntu 10.04 LTS: apache2.2-bin 2.2.14-5ubuntu8.15
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