CentOS 7 : kdenetwork (CESA-2014:1827)

Medium Nessus Plugin ID 79219

New! Vulnerability Priority Rating (VPR)

Tenable calculates a dynamic VPR for every vulnerability. VPR combines vulnerability information with threat intelligence and machine learning algorithms to predict which vulnerabilities are most likely to be exploited in attacks. Read more about what VPR is and how it's different from CVSS.

VPR Score: 5.9


The remote CentOS host is missing one or more security updates.


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.

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.

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.

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.


Update the affected kdenetwork packages.

See Also


Plugin Details

Severity: Medium

ID: 79219

File Name: centos_RHSA-2014-1827.nasl

Version: 1.10

Type: local

Agent: unix

Published: 2014/11/13

Updated: 2021/01/04

Dependencies: 12634

Risk Information

Risk Factor: Medium

VPR Score: 5.9

CVSS Score Source: CVE-2014-6055

CVSS v2.0

Base Score: 6.5

Temporal Score: 4.8

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:P

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:centos:centos:kdenetwork, p-cpe:/a:centos:centos:kdenetwork-common, p-cpe:/a:centos:centos:kdenetwork-devel, p-cpe:/a:centos:centos:kdenetwork-fileshare-samba, p-cpe:/a:centos:centos:kdenetwork-kdnssd, p-cpe:/a:centos:centos:kdenetwork-kget, p-cpe:/a:centos:centos:kdenetwork-kget-libs, p-cpe:/a:centos:centos:kdenetwork-kopete, p-cpe:/a:centos:centos:kdenetwork-kopete-devel, p-cpe:/a:centos:centos:kdenetwork-kopete-libs, p-cpe:/a:centos:centos:kdenetwork-krdc, p-cpe:/a:centos:centos:kdenetwork-krdc-devel, p-cpe:/a:centos:centos:kdenetwork-krdc-libs, p-cpe:/a:centos:centos:kdenetwork-krfb, p-cpe:/a:centos:centos:kdenetwork-krfb-libs, cpe:/o:centos:centos:7

Required KB Items: Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2014/11/12

Vulnerability Publication Date: 2014/09/30

Reference Information

CVE: CVE-2014-6053, CVE-2014-6054, CVE-2014-6055

BID: 70092, 70094, 70096

RHSA: 2014:1827