Scientific Linux Security Update : kernel on SL6.x i386/x86_64

This script is Copyright (C) 2012-2013 Tenable Network Security, Inc.


Synopsis :

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

Description :

The kernel packages contain the Linux kernel, the core of any Linux
operating system.

This update fixes the following security issues :

- A buffer overflow flaw was found in the way the Linux
kernel's XFS file system implementation handled links
with overly long path names. A local, unprivileged user
could use this flaw to cause a denial of service or
escalate their privileges by mounting a
specially-crafted disk. (CVE-2011-4077, Moderate)

- Flaws in ghash_update() and ghash_final() could allow a
local, unprivileged user to cause a denial of service.
(CVE-2011-4081, Moderate)

- A flaw was found in the Linux kernel's Journaling Block
Device (JBD). A local, unprivileged user could use this
flaw to crash the system by mounting a specially-crafted
ext3 or ext4 disk. (CVE-2011-4132, Moderate)

- It was found that the kvm_vm_ioctl_assign_device()
function in the KVM (Kernel-based Virtual Machine)
subsystem of a Linux kernel did not check if the user
requesting device assignment was privileged or not. A
local, unprivileged user on the host could assign unused
PCI devices, or even devices that were in use and whose
resources were not properly claimed by the respective
drivers, which could result in the host crashing.
(CVE-2011-4347, Moderate)

- Two flaws were found in the way the Linux kernel's
__sys_sendmsg() function, when invoked via the
sendmmsg() system call, accessed user-space memory. A
local, unprivileged user could use these flaws to cause
a denial of service. (CVE-2011-4594, Moderate)

- A flaw was found in the way the KVM subsystem of a Linux
kernel handled PIT (Programmable Interval Timer) IRQs
(interrupt requests) when there was no virtual interrupt
controller set up. A local, unprivileged user on the
host could force this situation to occur, resulting in
the host crashing. (CVE-2011-4622, Moderate)

- A flaw was found in the way the Linux kernel's XFS file
system implementation handled on-disk Access Control
Lists (ACLs). A local, unprivileged user could use this
flaw to cause a denial of service or escalate their
privileges by mounting a specially-crafted disk.
(CVE-2012-0038, Moderate)

- A flaw was found in the way the Linux kernel's KVM
hypervisor implementation emulated the syscall
instruction for 32-bit guests. An unprivileged guest
user could trigger this flaw to crash the guest.
(CVE-2012-0045, Moderate)

- A divide-by-zero flaw was found in the Linux kernel's
igmp_heard_query() function. An attacker able to send
certain IGMP (Internet Group Management Protocol)
packets to a target system could use this flaw to cause
a denial of service. (CVE-2012-0207, Moderate)

Users should upgrade to these updated packages, which contain
backported patches to correct these issues. The system must be
rebooted for this update to take effect.

See also :

http://www.nessus.org/u?e6e1e050

Solution :

Update the affected packages.

Risk factor :

High / CVSS Base Score : 7.8
(CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C)
Public Exploit Available : true

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 61277 ()

Bugtraq ID:

CVE ID: CVE-2011-4077
CVE-2011-4081
CVE-2011-4132
CVE-2011-4347
CVE-2011-4594
CVE-2011-4611
CVE-2011-4622
CVE-2012-0038
CVE-2012-0045
CVE-2012-0207