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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.2582 libx11 vulnerabilities 31 August 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: libx11 Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction Access Privileged Data -- Remote with User Interaction Denial of Service -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2018-14600 CVE-2018-14599 CVE-2018-14598 CVE-2016-7943 CVE-2016-7942 Reference: ASB-2017.0219 ESB-2018.2562 Original Bulletin: http://www.ubuntu.com/usn/usn-3758-1 http://www.ubuntu.com/usn/usn-3758-2 Comment: This bulletin contains two (2) Ubuntu security advisories. - --------------------------BEGIN INCLUDED TEXT-------------------- USN-3758-1: libx11 vulnerabilities 30 August 2018 libx11 vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: o Ubuntu 18.04 LTS o Ubuntu 16.04 LTS o Ubuntu 14.04 LTS Summary Several security issues were fixed in libx11. Software Description o libx11 - X11 client-side library Details Tobias Stoeckmann discovered that libx11 incorrectly handled certain images. An attacker could possibly use this issue to access sensitive information (CVE-2016-7942) Tobias Stoeckmann discovered that libx11 incorrectly handled certain inputs. An attacker could possibly use this issue to access sensitive information. (CVE-2016-7943) It was discovered that libx11 incorrectly handled certain inputs. An attacker could possibly use this issue to cause a denial of service. (CVE-2018-14598, CVE-2018-14599, CVE-2018-14600) Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS libx11-6 - 2:1.6.4-3ubuntu0.1 libx11-dev - 2:1.6.4-3ubuntu0.1 Ubuntu 16.04 LTS libx11-6 - 2:1.6.3-1ubuntu2.1 libx11-dev - 2:1.6.3-1ubuntu2.1 Ubuntu 14.04 LTS libx11-6 - 2:1.6.2-1ubuntu2.1 libx11-dev - 2:1.6.2-1ubuntu2.1 To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades After a standard system update you need to reboot your computer to make all the necessary changes. References o CVE-2016-7942 o CVE-2016-7943 o CVE-2018-14598 o CVE-2018-14599 o CVE-2018-14600 - ------------------------------------------------------------------------------- USN-3758-2: libx11 vulnerabilities 30 August 2018 libx11 vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: o Ubuntu 12.04 ESM Summary Several security issues were fixed in libx11. Software Description o libx11 - X11 client-side library Details USN-3758-1 fixed several vulnerabilities in libx11. This update provides the corresponding update for Ubuntu 12.04 ESM. Original advisory details: Tobias Stoeckmann discovered that libx11 incorrectly handled certain images. An attacker could possibly use this issue to access sensitive information (CVE-2016-7942) Tobias Stoeckmann discovered that libx11 incorrectly handled certain inputs. An attacker could possibly use this issue to access sensitive information. (CVE-2016-7943) It was discovered that libx11 incorrectly handled certain inputs. An attacker could possibly use this issue to cause a denial of service. (CVE-2018-14598, CVE-2018-14599, CVE-2018-14600) Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 12.04 ESM libx11-6 - 2:1.4.99.1-0ubuntu2.4 libx11-dev - 2:1.4.99.1-0ubuntu2.4 To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades After a standard system update you need to reboot your computer to make all the necessary changes. References o USN-3758-1 o CVE-2016-7942 o CVE-2016-7943 o CVE-2018-14598 o CVE-2018-14599 o CVE-2018-14600 - --------------------------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 auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au 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 iQIVAwUBW4iZXWaOgq3Tt24GAQjcZA/+P1Ig5zO8EzVhX2kcZ63JW1DtrrfC9chS 7z3b//vS768yVMNmdATt/G6unA3t7ekwLbX03VPdhOMbAk+UvtmVDA7LATsA4ovm XwC5D5F8Rwn2/kic/7kaCVZLA2mC8egVAftwMqA9QdBsi0GhwwsKUpTHFQ90uYsd l8iYePTEQlqN5GyHZpsLzPm4rmXqN0aEEkWGBN97R8NUHfe0vfm0rX4SiuV07/5j IYEtjohl6l1ZyJC5u/JV8nep4jhqdblkuMbNJjzG3mqKxCtEopDumnGdD+5kC6DI Jic5yMifjDw6oJXjaFbEx+ylAmLL4dvA3vwWPVRlvENfjeSAmEIHm/Wl0df7d91M m0PACsnHmrE2ruHp01fMxr7n6/3NIf3Cm5vAM0F3cZaIApYdbEeJsgsx7id6en5K 7cKHw6xm+ktAEfmQwOxIQnUDuWVUse80xhRAA+r9ufSDcDUgVQ4DWQqBaTA4a1eR h+G04sHYoXGBQWEYFUw+IllzsfeRb3MamXnXwQlIsDxW+7hMADoJmfb4pjorMBT4 ukyXlC1ls0vW/U1/4SoszWMvM7qPcQAU5kYMl8P+ZBBI3Iqn9qjkjYgjSERuWbC7 JJqQxGgte4bfuaJR/z8dj/x6Hopm1Kf+lm25GqVX9UwGzITV2g5SyhIgR31GtozU qMOw01TpCWo= =sp/Z -----END PGP SIGNATURE-----