Executive Summary

Summary
Title LibVNCServer vulnerabilities
Informations
Name USN-3171-1 First vendor Publication 2017-01-11
Vendor Ubuntu Last vendor Modification 2017-01-11
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 16.10 - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS - Ubuntu 12.04 LTS

Summary:

Several security issues were fixed in LibVNCServer.

Software Description: - libvncserver: vnc server library

Details:

Josef Gajdusek discovered that the LibVNCServer client library incorrectly handled certain FrameBufferUpdate messages. If a user were tricked into connecting to a malicious server, an attacker could use this issue to cause a denial of service, or possibly execute arbitrary code. (CVE-2016-9941, CVE-2016-9942)

Update instructions:

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

Ubuntu 16.10:
libvncclient1 0.9.10+dfsg-3ubuntu0.16.10.1
libvncserver1 0.9.10+dfsg-3ubuntu0.16.10.1

Ubuntu 16.04 LTS:
libvncclient1 0.9.10+dfsg-3ubuntu0.16.04.1
libvncserver1 0.9.10+dfsg-3ubuntu0.16.04.1

Ubuntu 14.04 LTS:
libvncserver0 0.9.9+dfsg-1ubuntu1.2

Ubuntu 12.04 LTS:
libvncserver0 0.9.8.2-2ubuntu1.2

In general, a standard system update will make all the necessary changes.

References:
http://www.ubuntu.com/usn/usn-3171-1
CVE-2016-9941, CVE-2016-9942

Package Information:
https://launchpad.net/ubuntu/+source/libvncserver/0.9.10+dfsg-3ubuntu0.16.10.1
https://launchpad.net/ubuntu/+source/libvncserver/0.9.10+dfsg-3ubuntu0.16.04.1
https://launchpad.net/ubuntu/+source/libvncserver/0.9.9+dfsg-1ubuntu1.2
https://launchpad.net/ubuntu/+source/libvncserver/0.9.8.2-2ubuntu1.2

Original Source

Url : http://www.ubuntu.com/usn/USN-3171-1

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-119 Failure to Constrain Operations within the Bounds of a Memory Buffer

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 2

Nessus® Vulnerability Scanner

Date Description
2017-07-17 Name : The remote Fedora host is missing a security update.
File : fedora_2017-6125002d79.nasl - Type : ACT_GATHER_INFO
2017-07-10 Name : The remote EulerOS host is missing a security update.
File : EulerOS_SA-2017-1130.nasl - Type : ACT_GATHER_INFO
2017-05-26 Name : The remote Fedora host is missing a security update.
File : fedora_2017-0e08170fd3.nasl - Type : ACT_GATHER_INFO
2017-05-26 Name : The remote Fedora host is missing a security update.
File : fedora_2017-dd5d2381e4.nasl - Type : ACT_GATHER_INFO
2017-05-01 Name : The remote EulerOS host is missing multiple security updates.
File : EulerOS_SA-2017-1046.nasl - Type : ACT_GATHER_INFO
2017-03-08 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2017-0622-1.nasl - Type : ACT_GATHER_INFO
2017-02-21 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201702-24.nasl - Type : ACT_GATHER_INFO
2017-02-21 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2017-0519-1.nasl - Type : ACT_GATHER_INFO
2017-01-12 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2017-0104-1.nasl - Type : ACT_GATHER_INFO
2017-01-12 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3171-1.nasl - Type : ACT_GATHER_INFO
2017-01-10 Name : The remote FreeBSD host is missing a security-related update.
File : freebsd_pkg_64be967ad37911e6a071001e67f15f5a.nasl - Type : ACT_GATHER_INFO
2017-01-06 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-3753.nasl - Type : ACT_GATHER_INFO
2017-01-04 Name : The remote Debian host is missing a security update.
File : debian_DLA-777.nasl - Type : ACT_GATHER_INFO

Alert History

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0
1
Date Informations
2017-01-13 13:24:47
  • Multiple Updates
2017-01-11 21:22:57
  • First insertion