Synopsis:	Important: kernel security and bug fix update
Issue date:	2008-05-07
CVE Names:	CVE-2007-5498 CVE-2008-0007 CVE-2008-1367
                 CVE-2008-1375 CVE-2008-1619 CVE-2008-1669

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, Important)

* 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.

SL 5.x

    SRPMS:
kernel-2.6.18-53.1.19.el5.src.rpm
    i386:
kernel-2.6.18-53.1.19.el5.i686.rpm
kernel-debug-2.6.18-53.1.19.el5.i686.rpm
kernel-debug-devel-2.6.18-53.1.19.el5.i686.rpm
kernel-devel-2.6.18-53.1.19.el5.i686.rpm
kernel-doc-2.6.18-53.1.19.el5.noarch.rpm
kernel-headers-2.6.18-53.1.19.el5.i386.rpm
kernel-PAE-2.6.18-53.1.19.el5.i686.rpm
kernel-PAE-devel-2.6.18-53.1.19.el5.i686.rpm
kernel-xen-2.6.18-53.1.19.el5.i686.rpm
kernel-xen-devel-2.6.18-53.1.19.el5.i686.rpm
   Dependancies:
kernel-module-fuse-2.6.18-53.1.19.el5-2.6.3-1.el5.i686.rpm
kernel-module-fuse-2.6.18-53.1.19.el5PAE-2.6.3-1.el5.i686.rpm
kernel-module-fuse-2.6.18-53.1.19.el5xen-2.6.3-1.el5.i686.rpm
kernel-module-ipw3945-2.6.18-53.1.19.el5-1.2.0-2.el5.i686.rpm
kernel-module-ipw3945-2.6.18-53.1.19.el5PAE-1.2.0-2.el5.i686.rpm
kernel-module-ipw3945-2.6.18-53.1.19.el5xen-1.2.0-2.el5.i686.rpm
kernel-module-madwifi-2.6.18-53.1.19.el5-0.9.3.3-12.el5.i686.rpm
kernel-module-madwifi-2.6.18-53.1.19.el5PAE-0.9.3.3-12.el5.i686.rpm
kernel-module-madwifi-2.6.18-53.1.19.el5xen-0.9.3.3-12.el5.i686.rpm
kernel-module-madwifi-hal-2.6.18-53.1.19.el5-0.9.3.3-12.el5.i686.rpm
kernel-module-madwifi-hal-2.6.18-53.1.19.el5PAE-0.9.3.3-12.el5.i686.rpm
kernel-module-madwifi-hal-2.6.18-53.1.19.el5xen-0.9.3.3-12.el5.i686.rpm
kernel-module-ndiswrapper-2.6.18-53.1.19.el5-1.41-1.SL.i686.rpm
kernel-module-ndiswrapper-2.6.18-53.1.19.el5PAE-1.41-1.SL.i686.rpm
kernel-module-ndiswrapper-2.6.18-53.1.19.el5xen-1.41-1.SL.i686.rpm
kernel-module-openafs-2.6.18-53.1.19.el5-1.4.6-58.SL5.i686.rpm
kernel-module-openafs-2.6.18-53.1.19.el5PAE-1.4.6-58.SL5.i686.rpm
kernel-module-openafs-2.6.18-53.1.19.el5xen-1.4.6-58.SL5.i686.rpm
kernel-module-r1000-2.6.18-53.1.19.el5-1.05-1.sl.i686.rpm
kernel-module-r1000-2.6.18-53.1.19.el5PAE-1.05-1.sl.i686.rpm
kernel-module-r1000-2.6.18-53.1.19.el5xen-1.05-1.sl.i686.rpm

    x86_64:
kernel-2.6.18-53.1.19.el5.x86_64.rpm
kernel-debug-2.6.18-53.1.19.el5.x86_64.rpm
kernel-debug-devel-2.6.18-53.1.19.el5.x86_64.rpm
kernel-devel-2.6.18-53.1.19.el5.x86_64.rpm
kernel-doc-2.6.18-53.1.19.el5.noarch.rpm
kernel-headers-2.6.18-53.1.19.el5.x86_64.rpm
kernel-xen-2.6.18-53.1.19.el5.x86_64.rpm
kernel-xen-devel-2.6.18-53.1.19.el5.x86_64.rpm
   Dependancies:
kernel-module-fuse-2.6.18-53.1.19.el5-2.6.3-1.el5.x86_64.rpm
kernel-module-fuse-2.6.18-53.1.19.el5xen-2.6.3-1.el5.x86_64.rpm
kernel-module-ipw3945-2.6.18-53.1.19.el5-1.2.0-2.el5.x86_64.rpm
kernel-module-ipw3945-2.6.18-53.1.19.el5xen-1.2.0-2.el5.x86_64.rpm
kernel-module-madwifi-2.6.18-53.1.19.el5-0.9.3.3-12.el5.x86_64.rpm
kernel-module-madwifi-2.6.18-53.1.19.el5xen-0.9.3.3-12.el5.x86_64.rpm
kernel-module-madwifi-hal-2.6.18-53.1.19.el5-0.9.3.3-12.el5.x86_64.rpm
kernel-module-madwifi-hal-2.6.18-53.1.19.el5xen-0.9.3.3-12.el5.x86_64.rpm
kernel-module-ndiswrapper-2.6.18-53.1.19.el5-1.41-1.SL.x86_64.rpm
kernel-module-ndiswrapper-2.6.18-53.1.19.el5xen-1.41-1.SL.x86_64.rpm
kernel-module-openafs-2.6.18-53.1.19.el5-1.4.6-58.SL5.x86_64.rpm
kernel-module-openafs-2.6.18-53.1.19.el5xen-1.4.6-58.SL5.x86_64.rpm
kernel-module-r1000-2.6.18-53.1.19.el5-1.05-1.sl.x86_64.rpm
kernel-module-r1000-2.6.18-53.1.19.el5xen-1.05-1.sl.x86_64.rpm

-Connie Sieh
-Troy Dawson