Scientific Linux Security Update : kernel on SL7.x x86_64

This script is Copyright (C) 2017 Tenable Network Security, Inc.


Synopsis :

The remote Scientific Linux host is missing one or more security
updates.

Description :

Security Fix(es) :

- Linux kernel built with the Kernel-based Virtual Machine
(CONFIG_KVM) support is vulnerable to a NULL pointer
dereference flaw. It could occur on x86 platform, when
emulating an undefined instruction. An attacker could
use this flaw to crash the host kernel resulting in DoS.
(CVE-2016-8630, Important)

- A race condition issue leading to a use-after-free flaw
was found in the way the raw packet sockets
implementation in the Linux kernel networking subsystem
handled synchronization while creating the TPACKET_V3
ring buffer. A local user able to open a raw packet
socket (requires the CAP_NET_RAW capability) could use
this flaw to elevate their privileges on the system.
(CVE-2016-8655, Important)

- A flaw was discovered in the Linux kernel's
implementation of VFIO. An attacker issuing an ioctl can
create a situation where memory is corrupted and modify
memory outside of the expected area. This may overwrite
kernel memory and subvert kernel execution.
(CVE-2016-9083, Important)

- The use of a kzalloc with an integer multiplication
allowed an integer overflow condition to be reached in
vfio_pci_intrs.c. This combined with CVE-2016-9083 may
allow an attacker to craft an attack and use unallocated
memory, potentially crashing the machine.
(CVE-2016-9084, Moderate)

See also :

http://www.nessus.org/u?69647445

Solution :

Update the affected packages.

Risk factor :

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

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 97516 ()

Bugtraq ID:

CVE ID: CVE-2016-8630
CVE-2016-8655
CVE-2016-9083
CVE-2016-9084

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