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Ubuntu Security Notice USN-1134-1

Ubuntu Security Notice USN-1134-1
Posted May 25, 2011
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1134-1 - 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. 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.

tags | advisory, remote, web, denial of service
systems | linux, ubuntu
advisories | CVE-2011-0419, CVE-2011-1928
MD5 | 7640fe85831b9ec631f18a4b21a8ece4

Ubuntu Security Notice USN-1134-1

Change Mirror Download
==========================================================================
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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