Ubuntu 12.04 LTS : linux vulnerabilities (USN-2886-1)

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 :

It was discovered that a use-after-free vulnerability existed in the
AF_UNIX implementation in the Linux kernel. A local attacker could use
crafted epoll_ctl calls to cause a denial of service (system crash) or
expose sensitive information. (CVE-2013-7446)

It was discovered that the KVM implementation in the Linux kernel did
not properly restore the values of the Programmable Interrupt Timer
(PIT). A user-assisted attacker in a KVM guest could cause a denial of
service in the host (system crash). (CVE-2015-7513)

Guoyong Gang discovered that the ppp implementation in the Linux
kernel did not ensure that certain slot numbers are valid. A local
attacker with the privilege to call ioctl() on /dev/ppp could cause a
denial of service (system crash). (CVE-2015-7799)

Sasha Levin discovered that the Reliable Datagram Sockets (RDS)
implementation in the Linux kernel had a race condition when checking
whether a socket was bound or not. A local attacker could use this to
cause a denial of service (system crash). (CVE-2015-7990)

It was discovered that the Btrfs implementation in the Linux kernel
incorrectly handled compressed inline extants on truncation. A local
attacker could use this to expose sensitive information.
(CVE-2015-8374)

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 packages.

Risk factor :

Medium / CVSS Base Score : 6.9
(CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C)

Family: Ubuntu Local Security Checks

Nessus Plugin ID: 88518 ()

Bugtraq ID:

CVE ID: CVE-2013-7446
CVE-2015-7513
CVE-2015-7799
CVE-2015-7990
CVE-2015-8374
CVE-2015-8543
CVE-2015-8569
CVE-2015-8575
CVE-2015-8785

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