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

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Synopsis :

The remote Scientific Linux host is missing one or more security

Description :

These updated packages fix the following security issues :

- the absence of a protection mechanism when attempting to
access a critical section of code has been found in the
Linux kernel open file descriptors control mechanism,
fcntl. This could allow a local unprivileged user to
simultaneously execute code, which would otherwise be
protected against parallel execution. As well, a race
condition when handling locks in the Linux kernel fcntl
functionality, may have allowed a process belonging to a
local unprivileged user to gain re-ordered access to the
descriptor table. (CVE-2008-1669, Important)

- a possible hypervisor panic was found in the Linux
kernel. A privileged user of a fully virtualized guest
could initiate a stress-test File Transfer Protocol
(FTP) transfer between the guest and the hypervisor,
possibly leading to hypervisor panic. (CVE-2008-1619,

- the absence of a protection mechanism when attempting to
access a critical section of code, as well as a race
condition, have been found in the Linux kernel file
system event notifier, dnotify. This could allow a local
unprivileged user to get inconsistent data, or to send
arbitrary signals to arbitrary system processes.
(CVE-2008-1375, Important)

- when accessing kernel memory locations, certain Linux
kernel drivers registering a fault handler did not
perform required range checks. A local unprivileged user
could use this flaw to gain read or write access to
arbitrary kernel memory, or possibly cause a kernel
crash. (CVE-2008-0007, Important)

- the absence of sanity-checks was found in the hypervisor
block backend driver, when running 32-bit
paravirtualized guests on a 64-bit host. The number of
blocks to be processed per one request from guest to
host, or vice-versa, was not checked for its maximum
value, which could have allowed a local privileged user
of the guest operating system to cause a denial of
service. (CVE-2007-5498, Important)

- it was discovered that the Linux kernel handled string
operations in the opposite way to the GNU Compiler
Collection (GCC). This could allow a local unprivileged
user to cause memory corruption. (CVE-2008-1367, Low)

As well, these updated packages fix the following bugs :

- on IBM System z architectures, when running QIOASSIST
enabled QDIO devices in an IBM z/VM environment, the
output queue stalled under heavy load. This caused
network performance to degrade, possibly causing network
hangs and outages.

- multiple buffer overflows were discovered in the neofb
video driver. It was not possible for an unprivileged
user to exploit these issues, and as such, they have not
been handled as security issues.

- when running Microsoft Windows in a HVM, a bug in
vmalloc/vfree caused network performance to degrade.

- on certain architectures, a bug in the libATA sata_nv
driver may have caused infinite reboots, and an 'ata1:
CPB flags CMD err flags 0x11' error.

- repeatedly hot-plugging a PCI Express card may have
caused 'Bad DLLP' errors.

- a NULL pointer dereference in NFS, which may have caused
applications to crash, has been resolved.

- when attempting to kexec reboot, either manually or via
a panic-triggered kdump, the Unisys ES7000/one hanged
after rebooting in the new kernel, after printing the
'Memory: 32839688k/33685504k available' line.

See also :

Solution :

Update the affected packages.

Risk factor :

High / CVSS Base Score : 7.5

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 60395 ()

Bugtraq ID:

CVE ID: CVE-2007-5498

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