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 vulnerabilities
Informations
NameUSN-3877-1First vendor Publication2019-01-31
VendorUbuntuLast vendor Modification2019-01-31
Severity (Vendor) N/ARevisionN/A

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:N/I:N/A:C)
Cvss Base Score7.8Attack RangeNetwork
Cvss Impact Score6.9Attack ComplexityLow
Cvss Expoit Score10AuthenticationNone Required
Calculate full CVSS 2.0 Vectors scores

Detail

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

- Ubuntu 18.10 - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in LibVNCServer.

Software Description: - libvncserver: vnc server library

Details:

It was discovered that LibVNCServer incorrectly handled certain operations. A remote attacker able to connect to applications using 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 18.10:
libvncclient1 0.9.11+dfsg-1.1ubuntu0.1
libvncserver1 0.9.11+dfsg-1.1ubuntu0.1

Ubuntu 18.04 LTS:
libvncclient1 0.9.11+dfsg-1ubuntu1.1
libvncserver1 0.9.11+dfsg-1ubuntu1.1

Ubuntu 16.04 LTS:
libvncclient1 0.9.10+dfsg-3ubuntu0.16.04.3
libvncserver1 0.9.10+dfsg-3ubuntu0.16.04.3

Ubuntu 14.04 LTS:
libvncserver0 0.9.9+dfsg-1ubuntu1.4

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

References:
https://usn.ubuntu.com/usn/usn-3877-1
CVE-2018-15126, CVE-2018-15127, CVE-2018-20019, CVE-2018-20020,
CVE-2018-20021, CVE-2018-20022, CVE-2018-20023, CVE-2018-20024,
CVE-2018-20748, CVE-2018-20749, CVE-2018-20750, CVE-2018-6307

Package Information:
https://launchpad.net/ubuntu/+source/libvncserver/0.9.11+dfsg-1.1ubuntu0.1
https://launchpad.net/ubuntu/+source/libvncserver/0.9.11+dfsg-1ubuntu1.1
https://launchpad.net/ubuntu/+source/libvncserver/0.9.10+dfsg-3ubuntu0.16.04.3
https://launchpad.net/ubuntu/+source/libvncserver/0.9.9+dfsg-1ubuntu1.4

Original Source

Url : http://www.ubuntu.com/usn/USN-3877-1

CWE : Common Weakness Enumeration

%idName
50 %CWE-787Out-of-bounds Write (CWE/SANS Top 25)
17 %CWE-416Use After Free
17 %CWE-200Information Exposure
8 %CWE-476NULL Pointer Dereference
8 %CWE-400Uncontrolled Resource Consumption ('Resource Exhaustion')

CPE : Common Platform Enumeration

TypeDescriptionCount
Application1
Os4
Os2

Nessus® Vulnerability Scanner

DateDescription
2019-01-17Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2019-0059.nasl - Type : ACT_GATHER_INFO
2018-12-27Name : The remote Debian host is missing a security update.
File : debian_DLA-1617.nasl - Type : ACT_GATHER_INFO

Alert History

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0
DateInformations
2019-01-31 21:19:00
  • First insertion