Ubuntu 14.04 LTS : linux-lts-xenial, linux-aws regression (USN-3509-4) (Dirty COW)
High Nessus Plugin ID 105355
SynopsisThe remote Ubuntu host is missing one or more security-related patches.
DescriptionUSN-3509-2 fixed vulnerabilities in the Linux Hardware Enablement kernel for Ubuntu 14.04 LTS. Unfortunately, it also introduced a regression that prevented the Ceph network filesystem from being used.
This update fixes the problem.
We apologize for the inconvenience.
Mohamed Ghannam discovered that a use-after-free vulnerability existed in the Netlink subsystem (XFRM) in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-16939)
It was discovered that the Linux kernel did not properly handle copy-on- write of transparent huge pages. A local attacker could use this to cause a denial of service (application crashes) or possibly gain administrative privileges. (CVE-2017-1000405)
Fan Wu, Haoran Qiu, and Shixiong Zhao discovered that the associative array implementation in the Linux kernel sometimes did not properly handle adding a new entry. A local attacker could use this to cause a denial of service (system crash). (CVE-2017-12193)
Andrey Konovalov discovered an out-of-bounds read in the GTCO digitizer USB driver for the Linux kernel. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.
Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
SolutionUpdate the affected packages.