Home / mailings [USN-3169-3] Linux kernel (Raspberry Pi 2) vulnerabilities
Posted on 11 January 2017
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==========================================================================
Ubuntu Security Notice USN-3169-3
January 11, 2017
linux-raspi2 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.04 LTS
Summary:
Several security issues were fixed in the kernel.
Software Description:
- linux-raspi2: Linux kernel for Raspberry Pi 2
Details:
Baozeng Ding discovered a race condition that could lead to a use-after-
free in the Advanced Linux Sound Architecture (ALSA) subsystem of the Linux
kernel. A local attacker could use this to cause a denial of service
(system crash). (CVE-2016-9794)
Andrey Konovalov discovered that signed integer overflows existed in the
setsockopt() system call when handling the SO_SNDBUFFORCE and
SO_RCVBUFFORCE options. A local attacker with the CAP_NET_ADMIN capability
could use this to cause a denial of service (system crash or memory
corruption). (CVE-2016-9793)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 16.04 LTS:
linux-image-4.4.0-1040-raspi2 4.4.0-1040.47
linux-image-raspi2 4.4.0.1040.39
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:
http://www.ubuntu.com/usn/usn-3169-3
http://www.ubuntu.com/usn/usn-3169-1
CVE-2016-9793, CVE-2016-9794
Package Information:
https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1040.47
