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

Description :

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

This update fixes the following security issues :

- A NULL pointer dereference flaw was found in the
nf_ct_frag6_reasm() function in the Linux kernel's
netfilter IPv6 connection tracking implementation. A
remote attacker could use this flaw to send specially
crafted packets to a target system that is using IPv6
and also has the nf_conntrack_ipv6 kernel module loaded,
causing it to crash. (CVE-2012-2744, Important)

- A flaw was found in the way the Linux kernel's key
management facility handled replacement session keyrings
on process forks. A local, unprivileged user could use
this flaw to cause a denial of service. (CVE-2012-2745,

This update also fixes the following bugs :

- Previously introduced firmware files required for new
Realtek chipsets contained an invalid prefix
('rtl_nic_') in the file names, for example
'/lib/firmware/rtl_nic/rtl_nic_rtl8168d-1.fw'. This
update corrects these file names. For example, the
aforementioned file is now correctly named

- This update blacklists the ADMA428M revision of the 2GB
ATA Flash Disk device. This is due to data corruption
occurring on the said device when the Ultra-DMA 66
transfer mode is used. When the
'libata.force=5:pio0,6:pio0' kernel parameter is set,
the aforementioned device works as expected.

- On Scientific Linux 6, mounting an NFS export from a
server running Windows Server 2012 Release Candidate
returned the NFS4ERR_MINOR_VERS_MISMATCH error because
Windows Server 2012 Release Candidate supports NFSv4.1
only. Scientific Linux 6 did not properly handle the
returned error and did not fall back to using NFSv3,
which caused the mount operation to fail. With this
update, when the NFS4ERR_MINOR_VERS_MISMATCH error is
returned, the mount operation properly falls back to
using NFSv3 and no longer fails.

- On ext4 file systems, when fallocate() failed to
allocate blocks due to the ENOSPC condition (no space
left on device) for a file larger than 4 GB, the size of
the file became corrupted and, consequently, caused file
system corruption. This was due to a missing cast
operator in the 'ext4_fallocate()' function. With this
update, the underlying source code has been modified to
address this issue, and file system corruption no longer

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 :

Solution :

Update the affected packages.

Risk factor :

High / CVSS Base Score : 7.8

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 61361 ()

Bugtraq ID:

CVE ID: CVE-2012-2744

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