Ubuntu 14.04 LTS : linux-lts-vivid regression (USN-2910-2)

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 :

USN-2910-1 fixed vulnerabilities in the Ubuntu 15.04 Linux kernel
backported to Ubuntu 14.04 LTS. An incorrect locking fix caused a
regression that broke graphics displays for Ubuntu 14.04 LTS guests
running the Ubuntu 15.04 backport kernel within VMware virtual
machines. This update fixes the problem.

We apologize for the inconvenience.

halfdog discovered that OverlayFS, when mounting on top of a FUSE
mount, incorrectly propagated file attributes, including setuid. A
local unprivileged attacker could use this to gain privileges.
(CVE-2016-1576)

halfdog discovered that OverlayFS in the Linux kernel
incorrectly propagated security sensitive extended
attributes, such as POSIX ACLs. A local unprivileged
attacker could use this to gain privileges. (CVE-2016-1575)

It was discovered that the Linux kernel keyring subsystem
contained a race between read and revoke operations. A local
attacker could use this to cause a denial of service (system
crash). (CVE-2015-7550)

Guoyong Gang discovered that the Linux kernel networking
implementation did not validate protocol identifiers for
certain protocol families, A local attacker could use this
to cause a denial of service (system crash) or possibly gain
administrative privileges. (CVE-2015-8543)

Dmitry Vyukov discovered that the pptp implementation in the
Linux kernel did not verify an address length when setting
up a socket. A local attacker could use this to craft an
application that exposed sensitive information from kernel
memory. (CVE-2015-8569)

David Miller discovered that the Bluetooth implementation in
the Linux kernel did not properly validate the socket
address length for Synchronous Connection-Oriented (SCO)
sockets. A local attacker could use this to expose sensitive
information. (CVE-2015-8575)

It was discovered that the Linux kernel's Filesystem in
Userspace (FUSE) implementation did not handle initial zero
length segments properly. A local attacker could use this to
cause a denial of service (unkillable task). (CVE-2015-8785).

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-3.19-generic,
linux-image-3.19-generic-lpae and / or linux-image-3.19-lowlatency
packages.

Risk factor :

High / CVSS Base Score : 7.2
(CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 6.0
(CVSS2#E:F/RL:OF/RC:ND)
Public Exploit Available : true

Family: Ubuntu Local Security Checks

Nessus Plugin ID: 89026 ()

Bugtraq ID:

CVE ID: CVE-2015-7550
CVE-2015-8543
CVE-2015-8569
CVE-2015-8575
CVE-2015-8785
CVE-2016-1575
CVE-2016-1576

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