USN-1110-1: KDE-Libs vulnerabilities

Ubuntu Security Notice USN-1110-1

14th April, 2011

kde4libs vulnerabilities

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

  • Ubuntu 10.10
  • Ubuntu 10.04 LTS
  • Ubuntu 9.10


An attacker could send crafted input to Konqueror to view sensitive information.

Software description

  • kde4libs - KDE 4 core applications


It was discovered that KDE KSSL did not properly verify X.509 certificates
when the certificate was issued for an IP address. An attacker could
exploit this to perform a man in the middle attack to view sensitive
information or alter encrypted communications. (CVE-2011-1094)

Tim Brown discovered that KDE KHTML did not properly escape URLs from
externally generated error pages. An attacker could expoit this to conduct
cross-site scripting attacks. With cross-site scripting vulnerabilities, if
a user were tricked into viewing server output during a crafted server
request, a remote attacker could exploit this to modify the contents, or
steal confidential data (such as passwords), within the same domain.

Update instructions

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

Ubuntu 10.10:
libkio5 4:4.5.1-0ubuntu8.1
libkhtml5 4:4.5.1-0ubuntu8.1
Ubuntu 10.04 LTS:
kdelibs5 4:4.4.5-0ubuntu1.1
Ubuntu 9.10:
kdelibs5 4:4.3.2-0ubuntu7.3

To update your system, please follow these instructions:

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


CVE-2011-1094, CVE-2011-1168