25 July 2017
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.1820 X.Org X server vulnerabilities 25 July 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: xserver-xorg-core Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Root Compromise -- Existing Account Access Privileged Data -- Existing Account Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2017-10972 CVE-2017-10971 CVE-2017-2624 Reference: ESB-2017.1715 Original Bulletin: http://www.ubuntu.com/usn/usn-3362-1 - --------------------------BEGIN INCLUDED TEXT-------------------- ========================================================================== Ubuntu Security Notice USN-3362-1 July 24, 2017 xorg-server, xorg-server-hwe-16.04, xorg-server-lts-xenial vulnerabilities ========================================================================== 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: It was discovered that the X.Org X server incorrectly handled endianness conversion of certain X events. 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 as an administrator. (CVE-2017-10971) It was discovered that the X.Org X server incorrectly handled endianness conversion of certain X events. An attacker able to connect to an X server, either locally or remotely, could use this issue to possibly obtain sensitive information. (CVE-2017-10972) Eric Sesterhenn discovered that the X.Org X server incorrectly compared MIT cookies. An attacker could possibly use this issue to perform a timing attack and recover the MIT cookie. (CVE-2017-2624) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 17.04: xserver-xorg-core 2:1.19.3-1ubuntu1.1 Ubuntu 16.04 LTS: xserver-xorg-core 2:1.18.4-0ubuntu0.3 xserver-xorg-core-hwe-16.04 2:1.18.4-1ubuntu6.1~16.04.2 Ubuntu 14.04 LTS: xserver-xorg-core 2:1.15.1-0ubuntu2.9 xserver-xorg-core-lts-xenial 2:1.18.3-1ubuntu2.3~trusty2 After a standard system update you need to reboot your computer to make all the necessary changes. References: https://www.ubuntu.com/usn/usn-3362-1 CVE-2017-10971, CVE-2017-10972, CVE-2017-2624 Package Information: https://launchpad.net/ubuntu/+source/xorg-server/2:1.19.3-1ubuntu1.1 https://launchpad.net/ubuntu/+source/xorg-server/2:1.18.4-0ubuntu0.3 https://launchpad.net/ubuntu/+source/xorg-server-hwe-16.04/2:1.18.4-1ubuntu6.1~16.04.2 https://launchpad.net/ubuntu/+source/xorg-server/2:1.15.1-0ubuntu2.9 https://launchpad.net/ubuntu/+source/xorg-server-lts-xenial/2:1.18.3-1ubuntu2.3~trusty2 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to email@example.com and we will forward your request to the appropriate person. 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If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: firstname.lastname@example.org Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBWXaO04x+lLeg9Ub1AQgNmxAAm+sbOok0SDmcgivdOpew/mlNwmY8M3lT xVtzKgV5+FctVMRTF7KdLN63ZSmc3UI1f5E+wkRTYF4JEA8TiLBnLfudDrH5W+6R gFZWKJdqVmX2bK1ZzM916lXDNBg9nsCxSbntRSYmnJwn4nqXtzOkYIPZJ08WtWka W2xs30VM7YqTxGoTNJQ1Ik0gF1ezKMAt1AdgVmJzAGnSb67eBZ+Ex2Qe4u4BmsqV 5fCdcDrjqX6AQQK3Wca8HEoAU9Zm6ZxKTdRF6wzNXxF8SmCLg7lI50MBd8eG3EP5 bHw5NYGJ29fc+vRyx0sUqArfiOwvVye/9IDYpcmcEJQfgS5CLVz0hJZYVk2/8FZs hN1Vn9SMET9mAeFk7nswbmeGZ1Xj2zYXCO8DiNHPET9hD9jU4dJJ6yQmrGezPy0E N0hVzUpSr2MthxpOSrEvHpBvQQ4BE7v67slvSoCTbPeeNcLnM30ROzgzl6EH8CDn qPprdxreB7JsyxvfON4T6uLm7GC0lw/1eS7sGUwHyGDrNc+WHj0TmrRoVqhughPv rvEd3b7nFqj9/V6wEsfVstMMLPWuEzYzd0lfDTCTPsqiK5k13Pyv2UsgRs2S08kY nm8eTO8KOy/X13brw4vPUvHHQSRmjT621W8T7ihEFX7BbuTii6/CIUpZX+pyhR3T gEnKqORSxik= =HBMY -----END PGP SIGNATURE-----