Explore top 10 tips to secure your open-source projects now. Read More

×
Alerts This Week
Warning Icon 1 428
Alerts This Week
Warning Icon 1 428

Ubuntu 16.04 LTS: LSN-0021-1 High: Kernel Denial of Service Threats

ubuntu
Calendar Grey April 13, 2017
Dist Ubuntu Esm H88
Several security flaws in the Ubuntu kernel could lead to service interruptions or unauthorized entry. Discover additional details here.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

Andrey Konovalov discovered that the AF_PACKET implementation in the Linux

kernel did not properly validate certain block-size data. A local attacker

could use this to cause a denial of service (system crash). (CVE-2017-7308)

Andrey Konovalov discovered a use-after-free vulnerability in the DCCP

implementation in the Linux kernel. A local attacker could use this to

cause a denial of service (system crash) or possibly gain administrative

privileges. (CVE-2017-6074)

It was discovered that a race condition existed in the memory manager of

the Linux kernel when handling copy-on-write breakage of private read-only

memory mappings. A local attacker could use this to gain administrative

privileges. (CVE-2016-5195)

It was discovered that a use-after-free vulnerability existed in the block

device layer of the Linux kernel. A local attacker could use this to cau...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu kernel system crash security issues administrative access

Update Instructions

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

| Kernel          | Version  | flavors                  |
|-----------------+----------+--------------------------|
| 4.4.0-21.37     | 16.1     | generic, lowlatency      |
| 4.4.0-21.37     | 17.1     | generic, lowlatency      |
| 4.4.0-21.37     | 18.1     | generic, lowlatency      |
| 4.4.0-21.37     | 21.1     | generic, lowlatency      |
| 4.4.0-22.39     | 13.2     | generic, lowlatency      |
| 4.4.0-22.39     | 16.1     | generic, lowlatency      |
| 4.4.0-22.39     | 17.1     | generic, lowlatency      |
| 4.4.0-22.39     | 18.1     | generic, lowlatency      |
| 4.4.0-22.39     | 21.1     | generic, lowlatency      |
| 4.4.0-22.40     | 16.1     | generic, lowlatency      |
| 4.4.0-22.40     | 17.1     | generic, lowlatency      |
| 4.4.0-22.40     | 18.1     | generic, lowlatency      |
| 4.4.0-22.40     | 21.1     | generic, lowlatency      |
| 4.4.0-24.43     | 16.1     | generic, lowlatency      |
| 4.4.0-24.43     | 17.1     | generic, lowlatency      |
| 4.4.0-24.43     | 18.1     | generic, lowlatency      |
| 4.4.0-24.43     | 21.1     | generic, lowlatency      |
| 4.4.0-28.47     | 16.1     | generic, lowlatency      |
| 4.4.0-28.47     | 17.1     | generic, lowlatency      |
| 4.4.0-28.47     | 18.1     | generic, lowlatency      |
| 4.4.0-28.47     | 21.1     | generic, lowlatency      |
| 4.4.0-31.50     | 16.1     | generic, lowlatency      |
| 4.4.0-31.50     | 17.1     | generic, lowlatency      |
| 4.4.0-31.50     | 18.1     | generic, lowlatency      |
| 4.4.0-31.50     | 21.1     | generic, lowlatency      |
| 4.4.0-34.53     | 16.1     | generic, lowlatency      |
| 4.4.0-34.53     | 17.1     | generic, lowlatency      |
| 4.4.0-34.53     | 18.1     | generic, lowlatency      |
| 4.4.0-34.53     | 21.1     | generic, lowlatency      |
| 4.4.0-36.55     | 16.1     | generic, lowlatency      |
| 4.4.0-36.55     | 17.1     | generic, lowlatency      |
| 4.4.0-36.55     | 18.1     | generic, lowlatency      |
| 4.4.0-36.55     | 21.1     | generic, lowlatency      |
| 4.4.0-38.57     | 16.1     | generic, lowlatency      |
| 4.4.0-38.57     | 17.1     | generic, lowlatency      |
| 4.4.0-38.57     | 18.1     | generic, lowlatency      |
| 4.4.0-38.57     | 21.1     | generic, lowlatency      |
| 4.4.0-42.62     | 16.1     | generic, lowlatency      |
| 4.4.0-42.62     | 17.1     | generic, lowlatency      |
| 4.4.0-42.62     | 18.1     | generic, lowlatency      |
| 4.4.0-42.62     | 21.1     | generic, lowlatency      |
| 4.4.0-43.63     | 16.1     | generic, lowlatency      |
| 4.4.0-43.63     | 17.1     | generic, lowlatency      |
| 4.4.0-43.63     | 18.1     | generic, lowlatency      |
| 4.4.0-43.63     | 21.1     | generic, lowlatency      |
| 4.4.0-45.66     | 16.1     | generic, lowlatency      |
| 4.4.0-45.66     | 17.1     | generic, lowlatency      |
| 4.4.0-45.66     | 18.1     | generic, lowlatency      |
| 4.4.0-45.66     | 21.1     | generic, lowlatency      |
| 4.4.0-47.68     | 16.1     | generic, lowlatency      |
| 4.4.0-47.68     | 17.1     | generic, lowlatency      |
| 4.4.0-47.68     | 18.1     | generic, lowlatency      |
| 4.4.0-47.68     | 21.1     | generic, lowlatency      |
| 4.4.0-51.72     | 16.1     | generic, lowlatency      |
| 4.4.0-51.72     | 17.1     | generic, lowlatency      |
| 4.4.0-51.72     | 18.1     | generic, lowlatency      |
| 4.4.0-51.72     | 21.1     | generic, lowlatency      |
| 4.4.0-53.74     | 16.1     | generic, lowlatency      |
| 4.4.0-53.74     | 17.1     | generic, lowlatency      |
| 4.4.0-53.74     | 18.1     | generic, lowlatency      |
| 4.4.0-53.74     | 21.1     | generic, lowlatency      |
| 4.4.0-57.78     | 17.1     | generic, lowlatency      |
| 4.4.0-57.78     | 18.1     | generic, lowlatency      |
| 4.4.0-57.78     | 21.1     | generic, lowlatency      |
| 4.4.0-59.80     | 17.1     | generic, lowlatency      |
| 4.4.0-59.80     | 18.1     | generic, lowlatency      |
| 4.4.0-59.80     | 21.1     | generic, lowlatency      |
| 4.4.0-62.83     | 17.1     | generic, lowlatency      |
| 4.4.0-62.83     | 18.1     | generic, lowlatency      |
| 4.4.0-62.83     | 21.1     | generic, lowlatency      |
| 4.4.0-63.84     | 18.1     | generic, lowlatency      |
| 4.4.0-63.84     | 21.1     | generic, lowlatency      |
| 4.4.0-64.85     | 21.1     | generic, lowlatency      |
| 4.4.0-66.87     | 21.1     | generic, lowlatency      |
| 4.4.0-67.88     | 21.1     | generic, lowlatency      |
| 4.4.0-70.91     | 21.1     | generic, lowlatency      |
| 4.4.0-71.92     | 21.1     | generic, lowlatency      |

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

References

CVE-2016-5195, CVE-2016-7910, CVE-2016-7911, CVE-2016-7912,

CVE-2016-7916, CVE-2016-8399, CVE-2016-8630, CVE-2016-8633,

CVE-2016-9191, CVE-2016-9555, CVE-2016-9756, CVE-2017-2583,

CVE-2017-6074, CVE-2017-7308

April 10, 2017

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu kernel system crash security issues administrative access

Package Information

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.