Ubuntu security

USN-3976-4: Samba vulnerability samba vulnerability A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 14.04 ESM Summary USN-3876-1 introduced a regression in Samba. Software Description samba – SMB/CIFS file, print, and login server for Unix Details USN-3976-1 fixed a vulnerability in Samba. The update introduced a regression causing Samba to occasionally crash. This update fixes the problem. Original advisory details: Isaac Boukris and Andrew Bartlett discovered that Samba incorrectly checked S4U2Self packets. In certain environments, a remote attacker could possibly use this issue to escalate privileges. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 ESM samba – 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm2 To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades. In general, a standard system update will make all the necessary changes. References USN-3976-1 LP: 1827924 Source: USN-3976-4: Samba vulnerability

USN-3994-1: gnome-desktop vulnerability gnome-desktop3 vulnerability A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 19.04 Ubuntu 18.10 Ubuntu 18.04 LTS Summary gnome-desktop could be made to escape the thumbnailer sandbox. Software Description gnome-desktop3 – Introspection data for GnomeDesktop Details It was discovered that gnome-desktop incorrectly confined thumbnailers. If a user were tricked into downloading a malicious image file, a remote attacker could possibly combine this issue with another vulnerability to escape the sandbox and execute arbitrary code. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 19.04 libgnome-desktop-3-17 – 3.32.1-1ubuntu1.1 Ubuntu 18.10 libgnome-desktop-3-17 – 3.30.1-1ubuntu1.1 Ubuntu 18.04 LTS libgnome-desktop-3-17 – 3.28.2-0ubuntu1.3 To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades. After a standard system update you need to restart your session to make all the necessary changes. References CVE-2019-11460 [ more… ]

USN-3976-3: Samba regression samba regression A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 18.04 LTS Ubuntu 16.04 LTS Summary USN-3976-1 introduced a regression in Samba. Software Description samba – SMB/CIFS file, print, and login server for Unix Details USN-3976-1 fixed a vulnerability in Samba. The update introduced a regression causing Samba to occasionally crash. This update fixes the problem. We apologize for the inconvenience. Original advisory details: Isaac Boukris and Andrew Bartlett discovered that Samba incorrectly checked S4U2Self packets. In certain environments, a remote attacker could possibly use this issue to escalate privileges. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS samba – 2:4.7.6+dfsg~ubuntu-0ubuntu2.11 Ubuntu 16.04 LTS samba – 2:4.3.11+dfsg-0ubuntu0.16.04.21 To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades. In general, a standard system update [ more… ]

USN-3957-2: MariaDB vulnerabilities MariaDB vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 14.04 ESM Summary Several security issues were fixed in MariaDB. Software Description mariadb-5.5 – MariaDB database Details USN-3957-1 fixed multiple vulnerabilities in MySQL. This update addresses some of them in MariaDB 5.5. Ubuntu 14.04 LTS has been updated to MariaDB 5.5.64. In addition to security fixes, the updated packages contain bug fixes, new features, and possibly incompatible changes. Please see the following for more information: https://mariadb.com/kb/en/library/mariadb-5564-changelog/ https://mariadb.com/kb/en/library/mariadb-5564-release-notes/ Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 ESM mariadb-server – 5.5.64-1ubuntu0.14.04.1 To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades. This update uses a new upstream release, which includes additional bug fixes. In general, a standard system update will make all the necessary changes. References [ more… ]

USN-3977-2: Intel Microcode update intel-microcode update A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 19.04 Ubuntu 18.10 Ubuntu 18.04 LTS Ubuntu 16.04 LTS Ubuntu 14.04 ESM Summary The system could be made to expose sensitive information. Software Description intel-microcode – Processor microcode for Intel CPUs Details USN-3977-1 provided mitigations for Microarchitectural Data Sampling (MDS) vulnerabilities in Intel Microcode for a large number of Intel processor families. This update provides the corresponding updated microcode mitigations for Intel Cherry Trail and Bay Trail processor families. Original advisory details: Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Giorgi Maisuradze, Dan Horea Lutas, Andrei Lutas, Volodymyr Pikhur, Stephan van Schaik, Alyssa Milburn, Sebastian Österlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, Cristiano Giuffrida, Moritz Lipp, Michael Schwarz, and Daniel Gruss discovered that memory previously stored in microarchitectural fill buffers of an [ more… ]