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Ubuntu 16.04 LTS 0013-1 Severe: Kernel Denial Of Service Threats

ubuntu
Calendar Grey November 30, 2016
Scroller Ubuntu
Various kernel vulnerabilities resolved in Ubuntu 16.04 LTS targeting both local and remote threats, enhancing overall system protection.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

Ondrej Kozina discovered that the keyring interface in the Linux kernel

contained a buffer overflow when displaying timeout events via the

/proc/keys interface. A local attacker could use this to cause a denial of

service (system crash). (CVE-2016-7042)

Dmitry Vyukov discovered a use-after-free vulnerability during error

processing in the recvmmsg(2) implementation in the Linux kernel. A remote

attacker could use this to cause a denial of service (system crash) or

possibly execute arbitrary code. (CVE-2016-7117)

Marco Grassi discovered that the driver for Areca RAID Controllers in the

Linux kernel did not properly validate control messages. A local attacker

could use this to cause a denial of service (system crash) or possibly gain

privileges. (CVE-2016-7425)

Daxing Guo discovered a stack-based buffer overflow in the Broadcom

IEEE802.11n FullMAC driver in the Linux kernel. A...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow kernel local attack ubuntu severe

Update Instructions

The problem can be corrected by updating your livepatches to the following
versions:

| Kernel          | Version  | flavors                  |
|-----------------+----------+--------------------------|
| 4.4.0-21.37     | 14.1     | generic, lowlatency      |
| 4.4.0-22.39     | 14.1     | generic, lowlatency      |
| 4.4.0-22.40     | 14.1     | generic, lowlatency      |
| 4.4.0-24.43     | 14.1     | generic, lowlatency      |
| 4.4.0-28.47     | 14.1     | generic, lowlatency      |
| 4.4.0-31.50     | 14.1     | generic, lowlatency      |
| 4.4.0-34.53     | 14.1     | generic, lowlatency      |
| 4.4.0-36.55     | 14.1     | generic, lowlatency      |
| 4.4.0-38.57     | 14.1     | generic, lowlatency      |
| 4.4.0-42.62     | 14.1     | generic, lowlatency      |
| 4.4.0-43.63     | 14.1     | generic, lowlatency      |
| 4.4.0-45.66     | 14.1     | generic, lowlatency      |
| 4.4.0-47.68     | 14.1     | generic, lowlatency      |

Additionally, you should install an updated kernel with these fixes and
reboot at your convienience.

References

CVE-2016-7042, CVE-2016-7117, CVE-2016-7425, CVE-2016-8658

Severity
critical
Lowest
Low
Medium
High
Critical

November 30, 2016

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow kernel local attack ubuntu severe

Package Information

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