RHEL 7 : gtk-vnc (RHSA-2017:2258)

critical Nessus Plugin ID 102153

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Synopsis

The remote Red Hat host is missing one or more security updates.

Description

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2017:2258 advisory.

The gtk-vnc packages provide a VNC viewer widget for GTK. The gtk-vnc widget is built by using co- routines, which allows the widget to be completely asynchronous while remaining single-threaded.

The following packages have been upgraded to a later upstream version: gtk-vnc (0.7.0). (BZ#1416783)

Security Fix(es):

* It was found that gtk-vnc lacked proper bounds checking while processing messages using RRE, hextile, or copyrect encodings. A remote malicious VNC server could use this flaw to crash VNC viewers which are based on the gtk-vnc library. (CVE-2017-5884)

* An integer overflow flaw was found in gtk-vnc. A remote malicious VNC server could use this flaw to crash VNC viewers which are based on the gtk-vnc library. (CVE-2017-5885)

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.4 Release Notes linked from the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

Plugin Details

Severity: Critical

ID: 102153

File Name: redhat-RHSA-2017-2258.nasl

Version: 3.13

Type: local

Agent: unix

Family: Red Hat Local Security Checks

Published: 8/3/2017

Updated: 11/5/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

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

CVSS Score Source: CVE-2017-5885

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:gvnc-devel, p-cpe:/a:redhat:enterprise_linux:gvnc-tools, p-cpe:/a:redhat:enterprise_linux:gtk-vnc-python, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:redhat:enterprise_linux:gtk-vnc-devel, p-cpe:/a:redhat:enterprise_linux:gtk-vnc, p-cpe:/a:redhat:enterprise_linux:gvncpulse, p-cpe:/a:redhat:enterprise_linux:gvncpulse-devel, p-cpe:/a:redhat:enterprise_linux:gtk-vnc2, p-cpe:/a:redhat:enterprise_linux:gvnc, p-cpe:/a:redhat:enterprise_linux:gtk-vnc2-devel

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

Exploit Ease: No known exploits are available

Patch Publication Date: 8/1/2017

Vulnerability Publication Date: 2/28/2017

Reference Information

CVE: CVE-2017-5884, CVE-2017-5885

CWE: 190, 787

RHSA: 2017:2258

Detections

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