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

This script is Copyright (C) 2014 Tenable Network Security, Inc.

Synopsis :

The remote Scientific Linux host is missing one or more security

Description :

- A flaw was found in the way the Linux kernel's SCTP
implementation handled malformed or duplicate Address
Configuration Change Chunks (ASCONF). A remote attacker
could use either of these flaws to crash the system.
(CVE-2014-3673, CVE-2014-3687, Important)

- A flaw was found in the way the Linux kernel's SCTP
implementation handled the association's output queue. A
remote attacker could send specially crafted packets
that would cause the system to use an excessive amount
of memory, leading to a denial of service.
(CVE-2014-3688, Important)

- A stack overflow flaw caused by infinite recursion was
found in the way the Linux kernel's UDF file system
implementation processed indirect ICBs. An attacker with
physical access to the system could use a specially
crafted UDF image to crash the system. (CVE-2014-6410,

- It was found that the Linux kernel's networking
implementation did not correctly handle the setting of
the keepalive socket option on raw sockets. A local user
able to create a raw socket could use this flaw to crash
the system. (CVE-2012-6657, Low)

- It was found that the parse_rock_ridge_inode_internal()
function of the Linux kernel's ISOFS implementation did
not correctly check relocated directories when
processing Rock Ridge child link (CL) tags. An attacker
with physical access to the system could use a specially
crafted ISO image to crash the system or, potentially,
escalate their privileges on the system. (CVE-2014-5471,
CVE-2014-5472, Low)

Bug fixes :

- This update fixes a race condition issue between the
sock_queue_err_skb function and sk_forward_alloc
handling in the socket error queue (MSG_ERRQUEUE), which
could occasionally cause the kernel, for example when
using PTP, to incorrectly track allocated memory for the
error queue, in which case a traceback would occur in
the system log.

- The zcrypt device driver did not detect certain crypto
cards and the related domains for crypto adapters on
System z and s390x architectures. Consequently, it was
not possible to run the system on new crypto hardware.
This update enables toleration mode for such devices so
that the system can make use of newer crypto hardware.

- After mounting and unmounting an XFS file system several
times consecutively, the umount command occasionally
became unresponsive. This was caused by the
xlog_cil_force_lsn() function that was not waiting for
completion as expected. With this update,
xlog_cil_force_lsn() has been modified to correctly wait
for completion, thus fixing this bug.

- When using the ixgbe adapter with disabled LRO and the
tx-usec or rs- usec variables set to 0, transmit
interrupts could not be set lower than the default of 8
buffered tx frames. Consequently, a delay of TCP
transfer occurred. The restriction of a minimum of 8
buffered frames has been removed, and the TCP delay no
longer occurs.

- The offb driver has been updated for the QEMU standard
VGA adapter, fixing an incorrect displaying of colors

- Under certain circumstances, when a discovered MTU
expired, the IPv6 connection became unavailable for a
short period of time. This bug has been fixed, and the
connection now works as expected.

- A low throughput occurred when using the dm-thin driver
to write to unprovisioned or shared chunks for a thin
pool with the chunk size bigger than the max_sectors_kb

- Large write workloads on thin LVs could cause the iozone
and smallfile utilities to terminate unexpectedly.

See also :

Solution :

Update the affected packages.

Risk factor :

High / CVSS Base Score : 7.8

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 80099 ()

Bugtraq ID:

CVE ID: CVE-2012-6657

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