Scientific Linux Security Update : kernel on SL5.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
updates.

Description :

- An out-of-bounds memory access flaw was found in the
Linux kernel's system call auditing implementation. On a
system with existing audit rules defined, a local,
unprivileged user could use this flaw to leak kernel
memory to user space or, potentially, crash the system.
(CVE-2014-3917, Moderate)

This update also fixes the following bugs :

- A bug in the journaling code (jbd and jbd2) could, under
very heavy workload of fsync() operations, trigger a
BUG_ON and result in a kernel oops. Also, fdatasync()
could fail to immediately write out changes in the file
size only. These problems have been resolved by
backporting a series of patches that fixed these
problems in the respective code on Scientific Linux 6.
This update also improves performance of ext3 and ext4
file systems.

- Due to a bug in the ext4 code, the fdatasync() system
call did not force the inode size change to be written
to the disk if it was the only metadata change in the
file. This could result in the wrong inode size and
possible data loss if the system terminated
unexpectedly. The code handling inode updates has been
fixed and fdatasync() now writes data to the disk as
expected in this situation.

- A workaround to a DMA read problem in the tg3 driver was
incorrectly applied to the whole Broadcom 5719 and 5720
chipset family. This workaround is valid only to the A0
revision of the 5719 chips and for other revisions and
chips causes occasional Tx timeouts. This update
correctly applies the aforementioned workaround only to
the A0 revision of the 5719 chips.

- Due to a bug in the page writeback code, the system
could become unresponsive when being under memory
pressure and heavy NFS load. This update fixes the code
responsible for handling of dirty pages, and dirty page
write outs no longer flood the work queue.

The system must be rebooted for this update to take effect.

See also :

http://www.nessus.org/u?77ff23ef

Solution :

Update the affected packages.

Risk factor :

Low / CVSS Base Score : 3.3
(CVSS2#AV:L/AC:M/Au:N/C:P/I:N/A:P)

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 77552 ()

Bugtraq ID:

CVE ID: CVE-2014-3917

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