Executive Summary

Summary
Title X.Org X server vulnerabilities
Informations
Name USN-3453-1 First vendor Publication 2017-10-12
Vendor Ubuntu Last vendor Modification 2017-10-12
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:L/AC:L/Au:N/C:P/I:P/A:P)
Cvss Base Score 4.6 Attack Range Local
Cvss Impact Score 6.4 Attack Complexity Low
Cvss Expoit Score 3.9 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

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

- Ubuntu 17.04 - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in the X.Org X server.

Software Description: - xorg-server: X.Org X11 server - xorg-server-hwe-16.04: X.Org X11 server - xorg-server-lts-xenial: X.Org X11 server

Details:

Michal Srb discovered that the X.Org X server incorrectly handled shared memory segments. An attacker able to connect to an X server, either locally or remotely, could use this issue to crash the server, or possibly replace shared memory segments of other X clients in the same session. (CVE-2017-13721)

Michal Srb discovered that the X.Org X server incorrectly handled XKB buffers. An attacker able to connect to an X server, either locally or remotely, could use this issue to crash the server, or possibly execute arbitrary code. (CVE-2017-13723)

Update instructions:

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

Ubuntu 17.04:
xserver-xorg-core 2:1.19.3-1ubuntu1.2

Ubuntu 16.04 LTS:
xserver-xorg-core 2:1.18.4-0ubuntu0.6
xserver-xorg-core-hwe-16.04 2:1.19.3-1ubuntu1~16.04.3

Ubuntu 14.04 LTS:
xserver-xorg-core 2:1.15.1-0ubuntu2.10
xserver-xorg-core-lts-xenial 2:1.18.3-1ubuntu2.3~trusty3

After a standard system update you need to reboot your computer to make all the necessary changes.

References:
https://www.ubuntu.com/usn/usn-3453-1
CVE-2017-13721, CVE-2017-13723

Package Information:
https://launchpad.net/ubuntu/+source/xorg-server/2:1.19.3-1ubuntu1.2
https://launchpad.net/ubuntu/+source/xorg-server/2:1.18.4-0ubuntu0.6

https://launchpad.net/ubuntu/+source/xorg-server-hwe-16.04/2:1.19.3-1ubuntu1~16.04.3
https://launchpad.net/ubuntu/+source/xorg-server/2:1.15.1-0ubuntu2.10

https://launchpad.net/ubuntu/+source/xorg-server-lts-xenial/2:1.18.3-1ubuntu2.3~trusty3

Original Source

Url : http://www.ubuntu.com/usn/USN-3453-1

CWE : Common Weakness Enumeration

% Id Name
50 % CWE-269 Improper Privilege Management
50 % CWE-119 Failure to Constrain Operations within the Bounds of a Memory Buffer

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 170
Os 2

Nessus® Vulnerability Scanner

Date Description
2017-12-01 Name : The remote EulerOS host is missing a security update.
File : EulerOS_SA-2017-1295.nasl - Type : ACT_GATHER_INFO
2017-12-01 Name : The remote EulerOS host is missing a security update.
File : EulerOS_SA-2017-1296.nasl - Type : ACT_GATHER_INFO
2017-11-27 Name : The remote Debian host is missing a security update.
File : debian_DLA-1186.nasl - Type : ACT_GATHER_INFO
2017-11-27 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2017-3047-1.nasl - Type : ACT_GATHER_INFO
2017-11-17 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2017-3025-1.nasl - Type : ACT_GATHER_INFO
2017-10-30 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201710-30.nasl - Type : ACT_GATHER_INFO
2017-10-18 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-4000.nasl - Type : ACT_GATHER_INFO
2017-10-13 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3453-1.nasl - Type : ACT_GATHER_INFO
2017-10-10 Name : The remote FreeBSD host is missing one or more security-related updates.
File : freebsd_pkg_4f8ffb9cf3884fbdb90fb3131559d888.nasl - Type : ACT_GATHER_INFO
2017-10-09 Name : The remote Slackware host is missing a security update.
File : Slackware_SSA_2017-279-03.nasl - Type : ACT_GATHER_INFO

Alert History

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0
1
2
Date Informations
2017-11-06 05:24:16
  • Multiple Updates
2017-10-14 13:25:00
  • Multiple Updates
2017-10-12 21:22:47
  • First insertion