Executive Summary



This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Summary
Title LibVNCServer vulnerability
Informations
Name USN-3618-1 First vendor Publication 2018-04-04
Vendor Ubuntu Last vendor Modification 2018-04-04
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:P/I:P/A:P)
Cvss Base Score 7.5 Attack Range Network
Cvss Impact Score 6.4 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 17.10 - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS

Summary:

LibVNCServer could be made to crash, expose sensitive information, or run programs if it received specially crafted network traffic.

Software Description: - libvncserver: vnc server library

Details:

It was discovered that LibVNCServer incorrectly handled certain packet lengths. A remote attacker able to connect to a LibVNCServer could possibly use this issue to obtain sensitive information, cause a denial of service, or execute arbitrary code.

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 17.10:
libvncclient1 0.9.11+dfsg-1ubuntu0.1
libvncserver1 0.9.11+dfsg-1ubuntu0.1

Ubuntu 16.04 LTS:
libvncserver1 0.9.10+dfsg-3ubuntu0.16.04.2

Ubuntu 14.04 LTS:
libvncserver0 0.9.9+dfsg-1ubuntu1.3

After a standard system update you need to restart LibVNCServer applications to make all the necessary changes.

References:
https://usn.ubuntu.com/usn/usn-3618-1
CVE-2018-7225

Package Information:
https://launchpad.net/ubuntu/+source/libvncserver/0.9.11+dfsg-1ubuntu0.1
https://launchpad.net/ubuntu/+source/libvncserver/0.9.10+dfsg-3ubuntu0.16.04.2
https://launchpad.net/ubuntu/+source/libvncserver/0.9.9+dfsg-1ubuntu1.3

Original Source

Url : http://www.ubuntu.com/usn/USN-3618-1

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-190 Integer Overflow or Wraparound (CWE/SANS Top 25)

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 2
Os 3
Os 3
Os 1
Os 1
Os 1
Os 2
Os 1
Os 1

Nessus® Vulnerability Scanner

Date Description
2019-01-03 Name : The remote Fedora host is missing a security update.
File : fedora_2018-390001d1c7.nasl - Type : ACT_GATHER_INFO
2018-07-02 Name : The remote EulerOS host is missing a security update.
File : EulerOS_SA-2018-1176.nasl - Type : ACT_GATHER_INFO
2018-06-11 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-4221.nasl - Type : ACT_GATHER_INFO
2018-05-31 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2018-1055.nasl - Type : ACT_GATHER_INFO
2018-05-29 Name : The remote EulerOS host is missing a security update.
File : EulerOS_SA-2018-1139.nasl - Type : ACT_GATHER_INFO
2018-05-11 Name : The remote Amazon Linux 2 host is missing a security update.
File : al2_ALAS-2018-1012.nasl - Type : ACT_GATHER_INFO
2018-04-04 Name : The remote Fedora host is missing a security update.
File : fedora_2018-43541091ab.nasl - Type : ACT_GATHER_INFO
2018-04-02 Name : The remote Debian host is missing a security update.
File : debian_DLA-1332.nasl - Type : ACT_GATHER_INFO
2018-03-28 Name : The remote Fedora host is missing a security update.
File : fedora_2018-4897772a43.nasl - Type : ACT_GATHER_INFO

Alert History

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0
Date Informations
2018-04-04 21:19:14
  • First insertion