Synopsis: Moderate: kernel security and bug fix update
Issue Date: 2013-04-16
CVE Numbers: CVE-2013-0231
CVE-2013-0216
CVE-2013-0217
CVE-2013-1826
CVE-2012-6542
CVE-2012-6547
CVE-2012-6546
CVE-2012-6537
--
This update fixes the following security issues:
* A flaw was found in the Xen netback driver implementation in the Linux
kernel. A privileged guest user with access to a para-virtualized network
device could use this flaw to cause a long loop in netback, leading to a
denial of service that could potentially affect the entire system.
(CVE-2013-0216, Moderate)
* A flaw was found in the Xen PCI device back-end driver implementation in
the Linux kernel. A privileged guest user in a guest that has a PCI
passthrough device could use this flaw to cause a denial of service that
could potentially affect the entire system. (CVE-2013-0231, Moderate)
* A NULL pointer dereference flaw was found in the IP packet
transformation framework (XFRM) implementation in the Linux kernel. A
local user who has the CAP_NET_ADMIN capability could use this flaw to
cause a denial of service. (CVE-2013-1826, Moderate)
* Information leak flaws were found in the XFRM implementation in the
Linux kernel. A local user who has the CAP_NET_ADMIN capability could use
these flaws to leak kernel stack memory to user-space. (CVE-2012-6537,
Low)
* An information leak flaw was found in the logical link control (LLC)
implementation in the Linux kernel. A local, unprivileged user could use
this flaw to leak kernel stack memory to user-space. (CVE-2012-6542, Low)
* Two information leak flaws were found in the Linux kernel's Asynchronous
Transfer Mode (ATM) subsystem. A local, unprivileged user could use these
flaws to leak kernel stack memory to user-space. (CVE-2012-6546, Low)
* An information leak flaw was found in the TUN/TAP device driver in the
Linux kernel's networking implementation. A local user with access to a
TUN/TAP virtual interface could use this flaw to leak kernel stack memory
to user-space. (CVE-2012-6547, Low)
This update also fixes the following bugs:
* The IPv4 code did not correctly update the Maximum Transfer Unit (MTU)
of the designed interface when receiving ICMP Fragmentation Needed
packets. Consequently, a remote host did not respond correctly to ping
attempts. With this update, the IPv4 code has been modified so the MTU of
the designed interface is adjusted as expected in this situation. The ping
command now provides the expected output.
* Previously, the be2net code expected the last word of an MCC completion
message from the firmware to be transferred by direct memory access (DMA)
at once. However, this is not always true, and could therefore cause the
BUG_ON() macro to be triggered in the be_mcc_compl_is_new() function,
consequently leading to a kernel panic. The BUG_ON() macro has been
removed from be_mcc_compl_is_new(), and the kernel panic no longer occurs
in this scenario.
* Previously, the NFSv3 server incorrectly converted 64-bit cookies to
32-bit. Consequently, the cookies became invalid, which affected all file
system operations depending on these cookies, such as the READDIR
operation that is used to read entries from a directory. This led to
various problems, such as exported directories being empty or displayed
incorrectly, or an endless loop of the READDIRPLUS procedure which could
potentially cause a buffer overflow. This update modifies knfsd code so
that 64-bit cookies are now handled correctly and all file system
operations work as expected.
The system must be rebooted for this update to take effect.
--
SL5
x86_64
kernel-2.6.18-348.4.1.el5.x86_64.rpm
kernel-debug-2.6.18-348.4.1.el5.x86_64.rpm
kernel-debug-debuginfo-2.6.18-348.4.1.el5.x86_64.rpm
kernel-debug-devel-2.6.18-348.4.1.el5.x86_64.rpm
kernel-debuginfo-2.6.18-348.4.1.el5.x86_64.rpm
kernel-debuginfo-common-2.6.18-348.4.1.el5.x86_64.rpm
kernel-devel-2.6.18-348.4.1.el5.x86_64.rpm
kernel-headers-2.6.18-348.4.1.el5.x86_64.rpm
kernel-xen-2.6.18-348.4.1.el5.x86_64.rpm
kernel-xen-debuginfo-2.6.18-348.4.1.el5.x86_64.rpm
kernel-xen-devel-2.6.18-348.4.1.el5.x86_64.rpm
i386
kernel-2.6.18-348.4.1.el5.i686.rpm
kernel-PAE-2.6.18-348.4.1.el5.i686.rpm
kernel-PAE-debuginfo-2.6.18-348.4.1.el5.i686.rpm
kernel-PAE-devel-2.6.18-348.4.1.el5.i686.rpm
kernel-debug-2.6.18-348.4.1.el5.i686.rpm
kernel-debug-debuginfo-2.6.18-348.4.1.el5.i686.rpm
kernel-debug-devel-2.6.18-348.4.1.el5.i686.rpm
kernel-debuginfo-2.6.18-348.4.1.el5.i686.rpm
kernel-debuginfo-common-2.6.18-348.4.1.el5.i686.rpm
kernel-devel-2.6.18-348.4.1.el5.i686.rpm
kernel-headers-2.6.18-348.4.1.el5.i386.rpm
kernel-xen-2.6.18-348.4.1.el5.i686.rpm
kernel-xen-debuginfo-2.6.18-348.4.1.el5.i686.rpm
kernel-xen-devel-2.6.18-348.4.1.el5.i686.rpm
noarch
kernel-doc-2.6.18-348.4.1.el5.noarch.rpm
- Scientific Linux Development Team
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