Ubuntu 14.04 LTS : linux vulnerabilities (USN-2395-1)

Ubuntu Security Notice (C) 2014-2016 Canonical, Inc. / NASL script (C) 2014-2016 Tenable Network Security, Inc.


Synopsis :

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

Description :

Nadav Amit reported that the KVM (Kernel Virtual Machine) mishandles
noncanonical addresses when emulating instructions that change the rip
(Instruction Pointer). A guest user with access to I/O or the MMIO can
use this flaw to cause a denial of service (system crash) of the
guest. (CVE-2014-3647)

A flaw was discovered with the handling of the invept instruction in
the KVM (Kernel Virtual Machine) subsystem of the Linux kernel. An
unprivileged guest user could exploit this flaw to cause a denial of
service (system crash) on the guest. (CVE-2014-3646)

Lars Bull reported a race condition in the PIT (programmable interrupt
timer) emulation in the KVM (Kernel Virtual Machine) subsystem of the
Linux kernel. A local guest user with access to PIT i/o ports could
exploit this flaw to cause a denial of service (crash) on the host.
(CVE-2014-3611)

Lars Bull and Nadav Amit reported a flaw in how KVM (the Kernel
Virtual Machine) handles noncanonical writes to certain MSR registers.
A privileged guest user can exploit this flaw to cause a denial of
service (kernel panic) on the host. (CVE-2014-3610)

Raphael Geissert reported a NULL pointer dereference in the Linux
kernel's CIFS client. A remote CIFS server could cause a denial of
service (system crash) or possibly have other unspecified impact by
deleting IPC$ share during resolution of DFS referrals.
(CVE-2014-7145).

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-3.13-generic,
linux-image-3.13-generic-lpae and / or linux-image-3.13-lowlatency
packages.

Risk factor :

High / CVSS Base Score : 7.8
(CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C)
CVSS Temporal Score : 6.8
(CVSS2#E:ND/RL:OF/RC:C)
Public Exploit Available : false

Family: Ubuntu Local Security Checks

Nessus Plugin ID: 78765 ()

Bugtraq ID: 69867
70742
70743
70745
70748

CVE ID: CVE-2014-3610
CVE-2014-3611
CVE-2014-3646
CVE-2014-3647
CVE-2014-7145

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