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

This script is Copyright (C) 2012-2014 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 :

- IPv6 fragment identification value generation could
allow a remote attacker to disrupt a target system's
networking, preventing legitimate users from accessing
its services. (CVE-2011-2699, Important)

- A signedness issue was found in the Linux kernel's CIFS
(Common Internet File System) implementation. A
malicious CIFS server could send a specially crafted
response to a directory read request that would result
in a denial of service or privilege escalation on a
system that has a CIFS share mounted. (CVE-2011-3191,
Important)

- A flaw was found in the way the Linux kernel handled
fragmented IPv6 UDP datagrams over the bridge with UDP
Fragmentation Offload (UFO) functionality on. A remote
attacker could use this flaw to cause a denial of
service. (CVE-2011-4326, Important)

- The way IPv4 and IPv6 protocol sequence numbers and
fragment IDs were generated could allow a
man-in-the-middle attacker to inject packets and
possibly hijack connections. Protocol sequence numbers
and fragment IDs are now more random. (CVE-2011-3188,
Moderate)

- A buffer overflow flaw was found in the Linux kernel's
FUSE (Filesystem in Userspace) implementation. A local
user in the fuse group who has access to mount a FUSE
file system could use this flaw to cause a denial of
service. (CVE-2011-3353, Moderate)

- A flaw was found in the b43 driver in the Linux kernel.
If a system had an active wireless interface that uses
the b43 driver, an attacker able to send a specially
crafted frame to that interface could cause a denial of
service. (CVE-2011-3359, Moderate)

- A flaw was found in the way CIFS shares with DFS
referrals at their root were handled. An attacker on the
local network who is able to deploy a malicious CIFS
server could create a CIFS network share that, when
mounted, would cause the client system to crash.
(CVE-2011-3363, Moderate)

- A flaw was found in the way the Linux kernel handled
VLAN 0 frames with the priority tag set. When using
certain network drivers, an attacker on the local
network could use this flaw to cause a denial of
service. (CVE-2011-3593, Moderate)

- A flaw in the way memory containing security-related
data was handled in tpm_read() could allow a local,
unprivileged user to read the results of a previously
run TPM command. (CVE-2011-1162, Low)

- A heap overflow flaw was found in the Linux kernel's EFI
GUID Partition Table (GPT) implementation. A local
attacker could use this flaw to cause a denial of
service by mounting a disk that contains specially
crafted partition tables. (CVE-2011-1577, Low)

- The I/O statistics from the taskstats subsystem could be
read without any restrictions. A local, unprivileged
user could use this flaw to gather confidential
information, such as the length of a password used in a
process. (CVE-2011-2494, Low)

- It was found that the perf tool, a part of the Linux
kernel's Performance Events implementation, could load
its configuration file from the current working
directory. If a local user with access to the perf tool
were tricked into running perf in a directory that
contains a specially crafted configuration file, it
could cause perf to overwrite arbitrary files and
directories accessible to that user. (CVE-2011-2905,
Low)

This update also fixes various bugs.

See also :

http://www.nessus.org/u?905f0b62

Solution :

Update the affected packages.

Risk factor :

Critical / CVSS Base Score : 10.0
(CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C)