Ubuntu 16.04 LTS : linux-raspi2 vulnerabilities (USN-3056-1)

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


Synopsis :

The remote Ubuntu host is missing a security-related patch.

Description :

Ben Hawkes discovered an integer overflow in the Linux netfilter
implementation. On systems running 32 bit kernels, a local
unprivileged attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code with administrative
privileges. (CVE-2016-3135)

It was discovered that the keyring implementation in the Linux kernel
did not ensure a data structure was initialized before referencing it
after an error condition occurred. A local attacker could use this to
cause a denial of service (system crash). (CVE-2016-4470)

Sasha Levin discovered that a use-after-free existed in the percpu
allocator in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash) or possibly execute arbitrary
code with administrative privileges. (CVE-2016-4794)

Kangjie Lu discovered an information leak in the netlink
implementation of the Linux kernel. A local attacker could use this to
obtain sensitive information from kernel memory. (CVE-2016-5243).

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 package.

Risk factor :

High / CVSS Base Score : 7.2
(CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 6.5
(CVSS2#E:POC/RL:U/RC:ND)
Public Exploit Available : true

Family: Ubuntu Local Security Checks

Nessus Plugin ID: 92866 ()

Bugtraq ID:

CVE ID: CVE-2016-3135
CVE-2016-4470
CVE-2016-4794
CVE-2016-5243

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