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==========================================================================
Ubuntu Security Notice USN-1134-1
May 24, 2011

apache2, apr vulnerabilities
==========================================================================

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

- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS
- Ubuntu 8.04 LTS
- Ubuntu 6.06 LTS

Summary:

A denial of service issue exists that affects the Apache web server.

Software Description:
- apr: The Apache Portable Runtime Library
- apache2: a scalable, extensible web server

Details:

Maksymilian Arciemowicz reported that a flaw in the fnmatch()
implementation in the Apache Portable Runtime (APR) library could allow
an attacker to cause a denial of service. This can be demonstrated
in a remote denial of service attack against mod_autoindex in the
Apache web server. (CVE-2011-0419)

Is was discovered that the fix for CVE-2011-0419 introduced a different
flaw in the fnmatch() implementation that could also result in a
denial of service. (CVE-2011-1928)

Update instructions:

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

Ubuntu 11.04:
  libapr1                         1.4.2-7ubuntu2.1

Ubuntu 10.10:
  libapr1                         1.4.2-3ubuntu1.1

Ubuntu 10.04 LTS:
  libapr1                         1.3.8-1ubuntu0.3

Ubuntu 8.04 LTS:
  libapr1                         1.2.11-1ubuntu0.2

Ubuntu 6.06 LTS:
  libapr0                         2.0.55-4ubuntu2.13

After a standard system update you need to restart the Apache web
server or any other service that depends on the APR library to make
all the necessary changes.

References:
  CVE-2011-0419, CVE-2011-1928

Package Information:
  https://launchpad.net/ubuntu/+source/apr/1.4.2-7ubuntu2.1
  https://launchpad.net/ubuntu/+source/apr/1.4.2-3ubuntu1.1
  https://launchpad.net/ubuntu/+source/apr/1.3.8-1ubuntu0.3
  https://launchpad.net/ubuntu/+source/apr/1.2.11-1ubuntu0.2
  https://launchpad.net/ubuntu/+source/apache2/2.0.55-4ubuntu2.13

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