RedHat: RHSA-2016-1581:01 Important: kernel security update
Summary
The kernel packages contain the Linux kernel, the core of any Linux
operating system.
Security Fix(es):
* A flaw was found in the way certain interfaces of the Linux kernel's
Infiniband subsystem used write() as bi-directional ioctl() replacement,
which could lead to insufficient memory security checks when being invoked
using the splice() system call. A local unprivileged user on a system with
either Infiniband hardware present or RDMA Userspace Connection Manager
Access module explicitly loaded, could use this flaw to escalate their
privileges on the system. (CVE-2016-4565)
Red Hat would like to thank Jann Horn for reporting this issue.
Summary
Solution
For details on how to apply this update, which includes the changes
described in this advisory, refer to:
https://access.redhat.com/articles/11258
The system must be rebooted for this update to take effect.
References
https://access.redhat.com/security/cve/CVE-2016-4565 https://access.redhat.com/security/updates/classification/#important
Package List
Red Hat Enterprise Linux Server AUS (v. 6.4):
Source:
kernel-2.6.32-358.72.1.el6.src.rpm
noarch:
kernel-doc-2.6.32-358.72.1.el6.noarch.rpm
kernel-firmware-2.6.32-358.72.1.el6.noarch.rpm
x86_64:
kernel-2.6.32-358.72.1.el6.x86_64.rpm
kernel-debug-2.6.32-358.72.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-358.72.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-358.72.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-358.72.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-358.72.1.el6.x86_64.rpm
kernel-devel-2.6.32-358.72.1.el6.x86_64.rpm
kernel-headers-2.6.32-358.72.1.el6.x86_64.rpm
perf-2.6.32-358.72.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-358.72.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-358.72.1.el6.x86_64.rpm
Red Hat Enterprise Linux Server Optional AUS (v. 6.4):
Source:
kernel-2.6.32-358.72.1.el6.src.rpm
x86_64:
kernel-debug-debuginfo-2.6.32-358.72.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-358.72.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-358.72.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-358.72.1.el6.x86_64.rpm
python-perf-2.6.32-358.72.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-358.72.1.el6.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/
Topic
An update for kernel is now available for Red Hat Enterprise Linux 6.4Advanced Update Support.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux Server AUS (v. 6.4) - noarch, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 6.4) - x86_64
Bugs Fixed
1310570 - CVE-2016-4565 kernel: infiniband: Unprivileged process can overwrite kernel memory using rdma_ucm.ko