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Ubuntu Security Notice USN-2843-2 17th December, 2015 linux-lts-wily vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 14.04 LTS Summary Several security issues were fixed in the kernel. Software description linux-lts-wily – Linux hardware enablement kernel from Wily Details Jan Beulich discovered that the KVM svm hypervisor implementation in theLinux kernel did not properly catch Debug exceptions on AMD processors. Anattacker in a guest virtual machine could use this to cause a denial ofservice (system crash) in the host OS. (CVE-2015-8104) 郭永刚 discovered that the ppp implementation in the Linux kernel didnot ensure that certain slot numbers are valid. A local attacker with theprivilege to call ioctl() on /dev/ppp could cause a denial of service(system crash). (CVE-2015-7799) Dmitry Vyukov discovered that the Linux kernel's keyring handler attemptedto garbage collect incompletely instantiated keys. A local unprivilegedattacker could [ more… ]

Ubuntu Security Notice USN-2843-3 17th December, 2015 linux-raspi2 vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 15.10 Summary Several security issues were fixed in the kernel. Software description linux-raspi2 – Linux kernel for Raspberry Pi 2 Details 郭永刚 discovered that the ppp implementation in the Linux kernel didnot ensure that certain slot numbers are valid. A local attacker with theprivilege to call ioctl() on /dev/ppp could cause a denial of service(system crash). (CVE-2015-7799) Dmitry Vyukov discovered that the Linux kernel's keyring handler attemptedto garbage collect incompletely instantiated keys. A local unprivilegedattacker could use this to cause a denial of service (system crash).(CVE-2015-7872) It was discovered that the virtual video osd test driver in the Linuxkernel did not properly initialize data structures. A local attacker coulduse this to obtain sensitive information from the kernel. (CVE-2015-7884) It [ more… ]

Ubuntu Security Notice USN-2840-2 17th December, 2015 linux-ti-omap4 vulnerability A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 12.04 LTS Summary The system could be made to crash under certain conditions. Software description linux-ti-omap4 – Linux kernel for OMAP4 Details Dmitry Vyukov discovered that the Linux kernel's keyring handler attemptedto garbage collect incompletely instantiated keys. A local unprivilegedattacker could use this to cause a denial of service (system crash). Update instructions The problem can be corrected by updating your system to the following package version: Ubuntu 12.04 LTS: linux-image-3.2.0-1475-omap4 3.2.0-1475.97 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 makeall the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates havebeen given a new version number, which requires you to recompile andreinstall [ more… ]