EulerOS 2.0 SP3 : libvncserver (EulerOS-SA-2018-1176)

critical Nessus Plugin ID 110828
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 EulerOS host is missing a security update.

Description

According to the version of the libvncserver package installed, the EulerOS installation on the remote host is affected by the following vulnerability :

- LibVNCServer makes writing a VNC server (or more correctly, a program exporting a framebuffer via the Remote Frame Buffer protocol) easy.It hides the programmer from the tedious task of managing clients and compression schemata.Security Fix(es):An issue was discovered in LibVNCServer through 0.9.11.
rfbProcessClientNormalMessage() in rfbserver.c does not sanitize msg.cct.length, leading to access to uninitialized and potentially sensitive data or possibly unspecified other impact (e.g., an integer overflow) via specially crafted VNC packets.(CVE-2018-7225)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected libvncserver package.

See Also

http://www.nessus.org/u?6b661351

Plugin Details

Severity: Critical

ID: 110828

File Name: EulerOS_SA-2018-1176.nasl

Version: 1.8

Type: local

Published: 7/2/2018

Updated: 1/6/2021

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.5

Vector: 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: p-cpe:/a:huawei:euleros:libvncserver, cpe:/o:huawei:euleros:2.0

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

Excluded KB Items: Host/EulerOS/uvp_version

Patch Publication Date: 6/14/2018

Reference Information

CVE: CVE-2018-7225