Ubuntu 14.04 LTS : linux vulnerabilities (USN-2907-1)

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 :

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

Risk factor :

High / CVSS Base Score : 7.2
(CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C)

Family: Ubuntu Local Security Checks

Nessus Plugin ID: 88895 ()

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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