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
Name USN-3877-1 First vendor Publication 2019-01-31
Vendor Ubuntu Last vendor Modification 2019-01-31
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:N/I:N/A:C)
Cvss Base Score 7.8 Attack Range Network
Cvss Impact Score 6.9 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 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

% Id Name
55 % CWE-787 Out-of-bounds Write (CWE/SANS Top 25)
18 % CWE-665 Improper Initialization
18 % CWE-416 Use After Free
9 % CWE-476 NULL Pointer Dereference

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 1
Os 5
Os 2
Os 1
Os 1
Os 1
Os 1
Os 1
Os 1

Snort® IPS/IDS

Date Description
2020-01-07 LibVNCServer file transfer extension heap buffer overflow attempt
RuleID : 52397 - Revision : 1 - Type : SERVER-OTHER
2020-01-07 LibVNCServer file transfer extension heap buffer overflow attempt
RuleID : 52396 - Revision : 1 - Type : SERVER-OTHER
2020-01-07 LibVNCServer file transfer extension heap buffer overflow attempt
RuleID : 52395 - Revision : 1 - Type : SERVER-OTHER
2020-01-07 LibVNCServer file transfer extension heap buffer overflow attempt
RuleID : 52394 - Revision : 1 - Type : SERVER-OTHER
2020-01-07 LibVNCServer file transfer extension heap buffer overflow attempt
RuleID : 52393 - Revision : 1 - Type : SERVER-OTHER

Nessus® Vulnerability Scanner

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

Alert History

If you want to see full details history, please login or register.
0
Date Informations
2019-01-31 21:19:00
  • First insertion