USN-1134-1: APR vulnerabilities

Releases

• Ubuntu 11.04
• Ubuntu 10.10
• Ubuntu 10.04
• Ubuntu 8.04
• Ubuntu 6.06

Packages

• apache2 - a scalable, extensible web server
• apr - The Apache Portable Runtime Library

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 8.04

• libapr1 - 1.2.11-1ubuntu0.2

Ubuntu 6.06

• libapr0 - 2.0.55-4ubuntu2.13

Ubuntu 11.04

• libapr1 - 1.4.2-7ubuntu2.1

Ubuntu 10.10

• libapr1 - 1.4.2-3ubuntu1.1

Ubuntu 10.04

• libapr1 - 1.3.8-1ubuntu0.3

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