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Ubuntu Security Notice USN-1248-1

Ubuntu Security Notice USN-1248-1
Posted Oct 25, 2011
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1248-1 - Tim Brown discovered that KSSL in KDE-Libs did not properly perform input validation when displaying the common name (CN) for an SSL certificate. An attacker could exploit this to spoof the common name which could be used in an attack to trick the user into accepting a fraudulent certificate. This issue only affected Ubuntu 10.04 LTS and Ubuntu 10.10. It was discovered that KIO in KDE-Libs did not properly perform input validation during proxy authentication. An attacker could exploit this to modify displaying of the realm and proxy URL. Various other issues were also addressed.

tags | advisory, spoof
systems | linux, ubuntu
advisories | CVE-2011-3365
SHA-256 | b72f099c8d8ac3650765e3fd99be619d5711842026d8fc594ef9d2cacd4f30d8

Ubuntu Security Notice USN-1248-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-1248-1
October 25, 2011

kde4libs vulnerability
==========================================================================

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

- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS

Summary:

KDE-Libs could improperly display fraudulent security certificates.

Software Description:
- kde4libs: KDE 4 core applications and libraries

Details:

Tim Brown discovered that KSSL in KDE-Libs did not properly perform input
validation when displaying the common name (CN) for an SSL certificate. An
attacker could exploit this to spoof the common name which could be used in
an attack to trick the user into accepting a fraudulent certificate. This
issue only affected Ubuntu 10.04 LTS and Ubuntu 10.10. (CVE-2011-3365)

It was discovered that KIO in KDE-Libs did not properly perform input
validation during proxy authentication. An attacker could exploit this to
modify displaying of the realm and proxy URL.

Update instructions:

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

Ubuntu 11.04:
libkio5 4:4.6.5-0ubuntu1.1

Ubuntu 10.10:
libkio5 4:4.5.5-0ubuntu2.1

Ubuntu 10.04 LTS:
kdelibs5 4:4.4.5-0ubuntu1.2

After a standard system update you need to restart any applications that
use KSSL and KIO, such as Konqueror and Rekong, to make all the necessary
changes.

References:
http://www.ubuntu.com/usn/usn-1248-1
CVE-2011-3365

Package Information:
https://launchpad.net/ubuntu/+source/kde4libs/4:4.6.5-0ubuntu1.1
https://launchpad.net/ubuntu/+source/kde4libs/4:4.5.5-0ubuntu2.1
https://launchpad.net/ubuntu/+source/kde4libs/4:4.4.5-0ubuntu1.2


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