Scientific Linux 5 SLSA-2015:0783-1 Kernel Important Escalation Crash

Date: Tue, 7 Apr 2015 19:00:53 +0000
Reply-To: scientific-linux-users@
Sender: Security Errata for Scientific Linux
 
From: Pat Riehecky 
Subject: Security ERRATA Important: kernel on SL5.x i386/x86_64
MIME-Version: 1.0

Synopsis: Important: kernel security and bug fix update
Advisory ID: SLSA-2015:0783-1
Issue Date: 2015-04-07
CVE Numbers: CVE-2014-8159
 CVE-2014-8867
--

* It was found that the Linux kernel's Infiniband subsystem did not
properly sanitize input parameters while registering memory regions from
user space via the (u)verbs API. A local user with access to a
/dev/infiniband/uverbsX device could use this flaw to crash the system or,
potentially, escalate their privileges on the system. (CVE-2014-8159,
Important)

* An insufficient bound checking flaw was found in the Xen hypervisor's
implementation of acceleration support for the "REP MOVS" instructions. A
privileged HVM guest user could potentially use this flaw to crash the
host. (CVE-2014-8867, Important)

This update also fixes the following bugs:

* Under memory pressure, cached data was previously flushed to the backing
server using the PID of the thread responsible for flushing the data in
the Server Message Block (SMB) headers instead of the PID of the thread
which actually wrote the data. As a consequence, when a file was locked by
the writing thread prior to writing, the server considered writes by the
thread flushing the pagecache as being a separate process from writing to
a locked file, and thus rejected the writes. In addition, the data to be
written was discarded. This update ensures that the correct PID is sent to
the server, and data corruption is avoided when data is being written from
a client under memory pressure.

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

SL5
 x86_64
 kernel-2.6.18-404.el5.x86_64.rpm
 kernel-debug-2.6.18-404.el5.x86_64.rpm
 kernel-debug-debuginfo-2.6.18-404.el5.x86_64.rpm
 kernel-debug-devel-2.6.18-404.el5.x86_64.rpm
 kernel-debuginfo-2.6.18-404.el5.x86_64.rpm
 kernel-debuginfo-common-2.6.18-404.el5.x86_64.rpm
 kernel-devel-2.6.18-404.el5.x86_64.rpm
 kernel-headers-2.6.18-404.el5.x86_64.rpm
 kernel-xen-2.6.18-404.el5.x86_64.rpm
 kernel-xen-debuginfo-2.6.18-404.el5.x86_64.rpm
 kernel-xen-devel-2.6.18-404.el5.x86_64.rpm
 i386
 kernel-2.6.18-404.el5.i686.rpm
 kernel-PAE-2.6.18-404.el5.i686.rpm
 kernel-PAE-debuginfo-2.6.18-404.el5.i686.rpm
 kernel-PAE-devel-2.6.18-404.el5.i686.rpm
 kernel-debug-2.6.18-404.el5.i686.rpm
 kernel-debug-debuginfo-2.6.18-404.el5.i686.rpm
 kernel-debug-devel-2.6.18-404.el5.i686.rpm
 kernel-debuginfo-2.6.18-404.el5.i686.rpm
 kernel-debuginfo-common-2.6.18-404.el5.i686.rpm
 kernel-devel-2.6.18-404.el5.i686.rpm
 kernel-headers-2.6.18-404.el5.i386.rpm
 kernel-xen-2.6.18-404.el5.i686.rpm
 kernel-xen-debuginfo-2.6.18-404.el5.i686.rpm
 kernel-xen-devel-2.6.18-404.el5.i686.rpm
 noarch
 kernel-doc-2.6.18-404.el5.noarch.rpm

- Scientific Linux Development Team