SECURITY

USN-3422-1: Linux kernel vulnerabilities Ubuntu Security Notice USN-3422-1 18th September, 2017 linux vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 14.04 LTS Summary Several security issues were fixed in the Linux kernel. Software description linux – Linux kernel Details It was discovered that a buffer overflow existed in the Bluetooth stack ofthe Linux kernel when handling L2CAP configuration responses. A physicallyproximate attacker could use this to cause a denial of service (systemcrash). (CVE-2017-1000251) It was discovered that the asynchronous I/O (aio) subsystem of the Linuxkernel did not properly set permissions on aio memory mappings in somesituations. An attacker could use this to more easily exploit othervulnerabilities. (CVE-2016-10044) Baozeng Ding and Andrey Konovalov discovered a race condition in the L2TPv3IP Encapsulation implementation in the Linux kernel. A local attacker coulduse this to cause a denial of [ more… ]

USN-3424-1: libxml2 vulnerabilities Ubuntu Security Notice USN-3424-1 18th September, 2017 libxml2 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 libxml2. Software description libxml2 – GNOME XML library Details It was discovered that a type confusion error existed in libxml2. Anattacker could use this to specially construct XML data thatcould cause a denial of service or possibly execute arbitrarycode. (CVE-2017-0663) It was discovered that libxml2 did not properly validate parsed entityreferences. An attacker could use this to specially construct XMLdata that could expose sensitive information. (CVE-2017-7375) It was discovered that a buffer overflow existed in libxml2 whenhandling HTTP redirects. An attacker could use this to speciallyconstruct XML data that could cause a denial of service or possiblyexecute arbitrary code. (CVE-2017-7376) Marcel Böhme [ more… ]

USN-3423-1: Linux kernel vulnerability Ubuntu Security Notice USN-3423-1 18th September, 2017 linux vulnerability A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 12.04 LTS Summary The system could be made to crash if it received specially crafted bluetooth traffic. Software description linux – Linux kernel Details It was discovered that a buffer overflow existed in the Bluetooth stack ofthe Linux kernel when handling L2CAP configuration responses. A physicallyproximate attacker could use this to cause a denial of service (systemcrash). Update instructions The problem can be corrected by updating your system to the following package version: Ubuntu 12.04 LTS: linux-image-powerpc-smp 3.2.0.131.145 linux-image-3.2.0-131-omap 3.2.0-131.177 linux-image-3.2.0-131-powerpc-smp 3.2.0-131.177 linux-image-generic 3.2.0.131.145 linux-image-3.2.0-131-generic-pae 3.2.0-131.177 linux-image-3.2.0-131-highbank 3.2.0-131.177 linux-image-generic-pae 3.2.0.131.145 linux-image-3.2.0-131-virtual 3.2.0-131.177 linux-image-highbank 3.2.0.131.145 linux-image-virtual 3.2.0.131.145 linux-image-powerpc64-smp 3.2.0.131.145 linux-image-3.2.0-131-generic 3.2.0-131.177 linux-image-omap 3.2.0.131.145 linux-image-3.2.0-131-powerpc64-smp 3.2.0-131.177 To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades. After a [ more… ]

USN-3422-2: Linux kernel (Trusty HWE) vulnerabilities Ubuntu Security Notice USN-3422-2 18th September, 2017 linux-lts-trusty vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 12.04 LTS Summary Several security issues were fixed in the Linux kernel. Software description linux-lts-trusty – Linux hardware enablement kernel from Trusty for Precise ESM Details USN-3422-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04LTS. This update provides the corresponding updates for the LinuxHardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu12.04 LTS. It was discovered that a buffer overflow existed in the Bluetooth stack ofthe Linux kernel when handling L2CAP configuration responses. A physicallyproximate attacker could use this to cause a denial of service (systemcrash). (CVE-2017-1000251) It was discovered that the asynchronous I/O (aio) subsystem of the Linuxkernel did not properly set permissions on aio memory mappings in somesituations. An [ more… ]

USN-3420-2: Linux kernel (Xenial HWE) vulnerabilities Ubuntu Security Notice USN-3420-2 18th September, 2017 linux-lts-xenial vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 14.04 LTS Summary Several security issues were fixed in the Linux kernel. Software description linux-lts-xenial – Linux hardware enablement kernel from Xenial for Trusty Details USN-3420-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04LTS. This update provides the corresponding updates for the LinuxHardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu14.04 LTS. It was discovered that a buffer overflow existed in the Bluetooth stack ofthe Linux kernel when handling L2CAP configuration responses. A physicallyproximate attacker could use this to cause a denial of service (systemcrash). (CVE-2017-1000251) It was discovered that the Flash-Friendly File System (f2fs) implementationin the Linux kernel did not properly validate superblock metadata. A localattacker could use this to [ more… ]