============================================================================ Ubuntu Security Notice USN-2334-1 September 02, 2014 linux vulnerabilities ============================================================================ A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 12.04 LTS Summary: Several security issues were fixed in the kernel. Software Description: - linux: Linux kernel Details: An flaw was discovered in the Linux kernel's audit subsystem when auditing certain syscalls. A local attacker could exploit this flaw to obtain potentially sensitive single-bit values from kernel memory or cause a denial of service (OOPS). (CVE-2014-3917) An information leak was discovered in the rd_mcp backend of the iSCSI target subsystem in the Linux kernel. A local user could exploit this flaw to obtain sensitive information from ramdisk_mcp memory by leveraging access to a SCSI initiator. (CVE-2014-4027) Sasha Levin reported an issue with the Linux kernel's shared memory subsystem when used with range notifications and hole punching. A local user could exploit this flaw to cause a denial of service. (CVE-2014-4171) Toralf F=C3=B6rster reported an error in the Linux kernels syscall auditing on 32 bit x86 platforms. A local user could exploit this flaw to cause a denial of service (OOPS and system crash). (CVE-2014-4508) An information leak was discovered in the control implemenation of the Advanced Linux Sound Architecture (ALSA) subsystem in the Linux kernel. A local user could exploit this flaw to obtain sensitive information from kernel memory. (CVE-2014-4652) A use-after-free flaw was discovered in the Advanced Linux Sound Architecture (ALSA) control implementation of the Linux kernel. A local user could exploit this flaw to cause a denial of service (system crash). (CVE-2014-4653) A authorization bug was discovered with the snd_ctl_elem_add function of the Advanced Linux Sound Architecture (ALSA) in the Linux kernel. A local user could exploit his bug to cause a denial of service (remove kernel controls). (CVE-2014-4654) A flaw discovered in how the snd_ctl_elem function of the Advanced Linux Sound Architecture (ALSA) handled a reference count. A local user could exploit this flaw to cause a denial of service (integer overflow and limit bypass). (CVE-2014-4655) An integer overflow flaw was discovered in the control implementation of the Advanced Linux Sound Architecture (ALSA). A local user could exploit this flaw to cause a denial of service (system crash). (CVE-2014-4656) An integer underflow flaw was discovered in the Linux kernel's handling of the backlog value for certain SCTP packets. A remote attacker could exploit this flaw to cause a denial of service (socket outage) via a crafted SCTP packet. (CVE-2014-4667) Jason Gunthorpe reported a flaw with SCTP authentication in the Linux kernel. A remote attacker could exploit this flaw to cause a denial of service (NULL pointer dereference and OOPS). (CVE-2014-5077) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 12.04 LTS: linux-image-3.2.0-68-generic 3.2.0-68.102 linux-image-3.2.0-68-generic-pae 3.2.0-68.102 linux-image-3.2.0-68-highbank 3.2.0-68.102 linux-image-3.2.0-68-omap 3.2.0-68.102 linux-image-3.2.0-68-powerpc-smp 3.2.0-68.102 linux-image-3.2.0-68-powerpc64-smp 3.2.0-68.102 linux-image-3.2.0-68-virtual 3.2.0-68.102 After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. If you use linux-restricted-modules, you have to update that package as well to get modules which work with the new kernel version. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-server, linux-powerpc), a standard system upgrade will automatically perform this as well. References: http://www.ubuntu.com/usn/usn-2334-1 CVE-2014-3917, CVE-2014-4027, CVE-2014-4171, CVE-2014-4508, CVE-2014-4652, CVE-2014-4653, CVE-2014-4654, CVE-2014-4655, CVE-2014-4656, CVE-2014-4667, CVE-2014-5077 Package Information: https://launchpad.net/ubuntu/+source/linux/3.2.0-68.102