Sigurnosni nedostaci programskog paketa kdenetwork

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Red Hat Security Advisory

Synopsis: Moderate: kdenetwork security update
Advisory ID: RHSA-2014:1827-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2014-1827.html
Issue date: 2014-11-11
CVE Names: CVE-2014-6053 CVE-2014-6054 CVE-2014-6055
=====================================================================

1. Summary:

Updated kdenetwork packages that fix three security issues are now
available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having Moderate security
impact. Common Vulnerability Scoring System (CVSS) base scores, which give
detailed severity ratings, are available for each vulnerability from the
CVE links in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Client (v. 7) – noarch, x86_64
Red Hat Enterprise Linux Client Optional (v. 7) – noarch, x86_64
Red Hat Enterprise Linux Server (v. 7) – noarch, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) – x86_64
Red Hat Enterprise Linux Workstation (v. 7) – noarch, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) – x86_64

3. Description:

The kdenetwork packages contain networking applications for the K Desktop
Environment (KDE). Krfb Desktop Sharing, which is a part of the kdenetwork
package, is a server application that allows session sharing between users.
Krfb uses the LibVNCServer library.

A NULL pointer dereference flaw was found in the way LibVNCServer handled
certain ClientCutText message. A remote attacker could use this flaw to
crash the VNC server by sending a specially crafted ClientCutText message
from a VNC client. (CVE-2014-6053)

A divide-by-zero flaw was found in the way LibVNCServer handled the scaling
factor when it was set to “0”. A remote attacker could use this flaw to
crash the VNC server using a malicious VNC client. (CVE-2014-6054)

Two stack-based buffer overflow flaws were found in the way LibVNCServer
handled file transfers. A remote attacker could use this flaw to crash the
VNC server using a malicious VNC client. (CVE-2014-6055)

Red Hat would like to thank oCERT for reporting these issues. oCERT
acknowledges Nicolas Ruff as the original reporter.

Note: Prior to this update, the kdenetwork packages used an embedded copy
of the LibVNCServer library. With this update, the kdenetwork packages have
been modified to use the system LibVNCServer packages. Therefore, the
update provided by RHSA-2014:1826 must be installed to fully address the
issues in krfb described above.

All kdenetwork users are advised to upgrade to these updated packages,
which contain backported patches to correct these issues. All running
instances of the krfb server must be restarted for this update to take
effect.

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the
Red Hat Network to apply this update are available at
https://access.redhat.com/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

1144289 – CVE-2014-6053 libvncserver: server NULL pointer dereference flaw in ClientCutText message handling
1144291 – CVE-2014-6054 libvncserver: server divide-by-zero flaw in scaling factor handling
1144293 – CVE-2014-6055 libvncserver: server stacked-based buffer overflow flaws in file transfer handling

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
kdenetwork-4.10.5-8.el7_0.src.rpm

noarch:
kdenetwork-common-4.10.5-8.el7_0.noarch.rpm

Red Hat Enterprise Linux Client Optional (v. 7):

noarch:
kdenetwork-devel-4.10.5-8.el7_0.noarch.rpm

x86_64:
kdenetwork-4.10.5-8.el7_0.x86_64.rpm
kdenetwork-debuginfo-4.10.5-8.el7_0.i686.rpm
kdenetwork-debuginfo-4.10.5-8.el7_0.x86_64.rpm
kdenetwork-fileshare-samba-4.10.5-8.el7_0.x86_64.rpm
kdenetwork-kopete-4.10.5-8.el7_0.x86_64.rpm
kdenetwork-kopete-devel-4.10.5-8.el7_0.i686.rpm
kdenetwork-kopete-devel-4.10.5-8.el7_0.x86_64.rpm
kdenetwork-kopete-libs-4.10.5-8.el7_0.i686.rpm
kdenetwork-kopete-libs-4.10.5-8.el7_0.x86_64.rpm
kdenetwork-krdc-devel-4.10.5-8.el7_0.i686.rpm
kdenetwork-krdc-devel-4.10.5-8.el7_0.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
kdenetwork-4.10.5-8.el7_0.src.rpm

noarch:
kdenetwork-common-4.10.5-8.el7_0.noarch.rpm
kdenetwork-devel-4.10.5-8.el7_0.noarch.rpm

x86_64:
kdenetwork-debuginfo-4.10.5-8.el7_0.i686.rpm
kdenetwork-debuginfo-4.10.5-8.el7_0.x86_64.rpm
kdenetwork-kdnssd-4.10.5-8.el7_0.x86_64.rpm
kdenetwork-kget-4.10.5-8.el7_0.x86_64.rpm
kdenetwork-kget-libs-4.10.5-8.el7_0.i686.rpm
kdenetwork-kget-libs-4.10.5-8.el7_0.x86_64.rpm
kdenetwork-kopete-4.10.5-8.el7_0.x86_64.rpm
kdenetwork-kopete-devel-4.10.5-8.el7_0.i686.rpm
kdenetwork-kopete-devel-4.10.5-8.el7_0.x86_64.rpm
kdenetwork-kopete-libs-4.10.5-8.el7_0.i686.rpm
kdenetwork-kopete-libs-4.10.5-8.el7_0.x86_64.rpm
kdenetwork-krdc-4.10.5-8.el7_0.x86_64.rpm
kdenetwork-krdc-devel-4.10.5-8.el7_0.i686.rpm
kdenetwork-krdc-devel-4.10.5-8.el7_0.x86_64.rpm
kdenetwork-krdc-libs-4.10.5-8.el7_0.i686.rpm
kdenetwork-krdc-libs-4.10.5-8.el7_0.x86_64.rpm
kdenetwork-krfb-4.10.5-8.el7_0.x86_64.rpm
kdenetwork-krfb-libs-4.10.5-8.el7_0.i686.rpm
kdenetwork-krfb-libs-4.10.5-8.el7_0.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 7):

x86_64:
kdenetwork-4.10.5-8.el7_0.x86_64.rpm
kdenetwork-debuginfo-4.10.5-8.el7_0.x86_64.rpm
kdenetwork-fileshare-samba-4.10.5-8.el7_0.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
kdenetwork-4.10.5-8.el7_0.src.rpm

noarch:
kdenetwork-common-4.10.5-8.el7_0.noarch.rpm
kdenetwork-devel-4.10.5-8.el7_0.noarch.rpm

Red Hat Enterprise Linux Workstation Optional (v. 7):

x86_64:
kdenetwork-4.10.5-8.el7_0.x86_64.rpm
kdenetwork-debuginfo-4.10.5-8.el7_0.x86_64.rpm
kdenetwork-fileshare-samba-4.10.5-8.el7_0.x86_64.rpm

These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2014-6053
https://access.redhat.com/security/cve/CVE-2014-6054
https://access.redhat.com/security/cve/CVE-2014-6055
https://access.redhat.com/security/updates/classification/#moderate
https://rhn.redhat.com/errata/RHSA-2014-1826.html

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

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