Scientific Linux Security Update : kernel on SL5.x i386/x86_64

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

Synopsis :

The remote Scientific Linux host is missing one or more security

Description :

This update fixes the following security issues :

- Information leaks in the Linux kernel could allow a
local, unprivileged user to leak kernel memory to
user-space. (CVE-2012-6544, CVE-2012-6545,
CVE-2013-3222, CVE-2013-3224, CVE-2013-3231,
CVE-2013-3235, Low)

- An information leak was found in the Linux kernel's
POSIX signals implementation. A local, unprivileged user
could use this flaw to bypass the Address Space Layout
Randomization (ASLR) security feature. (CVE-2013-0914,

- A heap-based buffer overflow in the way the tg3 Ethernet
driver parsed the vital product data (VPD) of devices
could allow an attacker with physical access to a system
to cause a denial of service or, potentially, escalate
their privileges. (CVE-2013-1929, Low)

This update also fixes the following bugs :

- Previously on system boot, devices with associated
Reserved Memory Region Reporting (RMRR) information had
lost their RMRR information after they were removed from
the static identity (SI) domain. Consequently, a system
unexpectedly terminated in an endless loop due to
unexpected NMIs triggered by DMA errors. This problem
was observed on HP ProLiant Generation 7 (G7) and 8
(Gen8) systems. This update prevents non-USB devices
that have RMRR information associated with them from
being placed into the SI domain during system boot. HP
ProLiant G7 and Gen8 systems that contain devices with
the RMRR information now boot as expected.

- Previously, the kernel's futex wait code used timeouts
that had granularity in milliseconds. Also, when passing
these timeouts to system calls, the kernel converted the
timeouts to 'jiffies'. Consequently, programs could time
out inaccurately which could lead to significant latency
problems in certain environments. This update modifies
the futex wait code to use a high-resolution timer
(hrtimer) so the timeout granularity is now in
microseconds. Timeouts are no longer converted to
'jiffies' when passed to system calls. Timeouts passed
to programs are now accurate and the programs time out
as expected.

- A recent change modified the size of the task_struct
structure in the floating point unit (fpu) counter.
However, on Intel Itanium systems, this change caused
the kernel Application Binary Interface (kABI) to stop
working properly when a previously compiled module was
loaded, resulting in a kernel panic. With this update
the change causing this bug has been reverted so the bug
can no longer occur.

- The cxgb4 driver previously did not clear data
structures used for firmware requests. Consequently,
when initializing some Chelsio's Terminator 4 (T4)
adapters, a probe request could fail because the request
was incompatible with the adapter's firmware. This
update modifies the cxgb4 driver to properly initialize
firmware request structures before sending a request to
the firmware and the problem no longer occurs.

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

See also :

Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 4.9

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 67241 ()

Bugtraq ID:

CVE ID: CVE-2012-6544

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