Ubuntu 16.04 LTS : linux-raspi2 vulnerabilities (USN-3161-3)

Ubuntu Security Notice (C) 2016 Canonical, Inc. / NASL script (C) 2016 Tenable Network Security, Inc.


Synopsis :

The remote Ubuntu host is missing one or more security-related
patches.

Description :

Tilman Schmidt and Sasha Levin discovered a use-after-free condition
in the TTY implementation in the Linux kernel. A local attacker could
use this to expose sensitive information (kernel memory).
(CVE-2015-8964)

It was discovered that the Video For Linux Two (v4l2) implementation
in the Linux kernel did not properly handle multiple planes when
processing a VIDIOC_DQBUF ioctl(). A local attacker could use this to
cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2016-4568)

CAI Qian discovered that shared bind mounts in a mount namespace
exponentially added entries without restriction to the Linux kernel's
mount table. A local attacker could use this to cause a denial of
service (system crash). (CVE-2016-6213)

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)

Andreas Gruenbacher and Jan Kara discovered that the filesystem
implementation in the Linux kernel did not clear the setgid bit during
a setxattr call. A local attacker could use this to possibly elevate
group privileges. (CVE-2016-7097)

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)

It was discovered that the KVM implementation for x86/x86_64 in the
Linux kernel could dereference a NULL pointer. An attacker in a guest
virtual machine could use this to cause a denial of service (system
crash) in the KVM host. (CVE-2016-8630)

Eyal Itkin discovered that the IP over IEEE 1394 (FireWire)
implementation in the Linux kernel contained a buffer overflow when
handling fragmented packets. A remote attacker could use this to
possibly execute arbitrary code with administrative privileges.
(CVE-2016-8633)

Marco Grassi discovered that the TCP implementation in the Linux
kernel mishandles socket buffer (skb) truncation. A local attacker
could use this to cause a denial of service (system crash).
(CVE-2016-8645)

Daxing Guo discovered a stack-based buffer overflow in the Broadcom
IEEE802.11n FullMAC driver in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash) or possibly gain
privileges. (CVE-2016-8658)

It was discovered that an information leak existed in
__get_user_asm_ex() in the Linux kernel. A local attacker could use
this to expose sensitive information. (CVE-2016-9178)

Andrey Konovalov discovered that the SCTP implementation in the Linux
kernel improperly handled validation of incoming data. A remote
attacker could use this to cause a denial of service (system crash).
(CVE-2016-9555).

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.

Solution :

Update the affected linux-image-4.4-raspi2 and / or linux-image-raspi2
packages.

Risk factor :

Critical / CVSS Base Score : 10.0
(CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 7.4
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

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