星球 - USN-3083-1: Linux kernel vulnerabilities

來自:Ubuntu security notices | 2016/9/24 4:42:54

Ubuntu Security Notice USN-3083-1


19th September, 2016


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 kernel.





Software description





  • linux
    - Linux kernel







Details


Dmitry Vyukov discovered that the IPv6 implementation in the Linux kernel
did not properly handle options data, including a use-after-free. A local
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2016-3841)



It was discovered that a race condition existed when handling heartbeat-
timeout events in the SCTP implementation of the Linux kernel. A remote
attacker could use this to cause a denial of service. (CVE-2015-8767)



Update instructions


The problem can be corrected by updating your system to the following
package version:




Ubuntu 14.04 LTS:




linux-image-3.13.0-96-powerpc-smp

3.13.0-96.143






linux-image-3.13.0-96-powerpc-e500mc

3.13.0-96.143






linux-image-3.13.0-96-powerpc64-smp

3.13.0-96.143






linux-image-3.13.0-96-generic

3.13.0-96.143






linux-image-3.13.0-96-generic-lpae

3.13.0-96.143






linux-image-3.13.0-96-powerpc-e500

3.13.0-96.143






linux-image-3.13.0-96-powerpc64-emb

3.13.0-96.143






linux-image-3.13.0-96-lowlatency

3.13.0-96.143






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.



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.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.





References




CVE-2015-8767,

CVE-2016-3841