openSUSE Security Update : LibVNCServer (openSUSE-2018-326)

critical Nessus Plugin ID 108743

Language:

New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote openSUSE host is missing a security update.

Description

LibVNCServer was updated to fix two security issues.

These security issues were fixed :

- CVE-2018-7225: Missing input sanitization inside rfbserver.c rfbProcessClientNormalMessage() (bsc#1081493).

- CVE-2016-9942: Heap-based buffer overflow in ultra.c allowed remote servers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted FramebufferUpdate message with the Ultra type tile, such that the LZO payload decompressed length exceeds what is specified by the tile dimensions (bsc#1017712).

- CVE-2016-9941: Heap-based buffer overflow in rfbproto.c allowed remote servers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted FramebufferUpdate message containing a subrectangle outside of the client drawing area (bsc#1017711). This update was imported from the SUSE:SLE-12:Update update project.

Solution

Update the affected LibVNCServer packages.

See Also

https://bugzilla.opensuse.org/show_bug.cgi?id=1017711

https://bugzilla.opensuse.org/show_bug.cgi?id=1017712

https://bugzilla.opensuse.org/show_bug.cgi?id=1081493

Plugin Details

Severity: Critical

ID: 108743

File Name: openSUSE-2018-326.nasl

Version: 1.3

Type: local

Agent: unix

Published: 3/30/2018

Updated: 1/19/2021

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.5

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

CVSS v3

Risk Factor: Critical

Base Score: 9.8

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

Vulnerability Information

CPE: cpe:2.3:o:novell:opensuse:42.3:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:opensuse:libvncserver-debugsource:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:opensuse:libvncserver-devel:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:opensuse:libvncclient0:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:opensuse:libvncclient0-debuginfo:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:opensuse:libvncserver0:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:opensuse:libvncserver0-debuginfo:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:opensuse:linuxvnc:*:*:*:*:*:*:*, p-cpe:2.3:a:novell:opensuse:linuxvnc-debuginfo:*:*:*:*:*:*:*

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

Patch Publication Date: 3/29/2018

Reference Information

CVE: CVE-2016-9941, CVE-2016-9942, CVE-2018-7225