[Ksplice][EL7-Updates] New Ksplice updates for OL 7, RHEL 7, CentOS 7, and Scientific Linux 7 (ELSA-2017-0933)

[Jamie Iles]

Synopsis: ELSA-2017-0933 can now be patched using Ksplice
CVEs: CVE-2016-8650 CVE-2016-9793 CVE-2017-2618 CVE-2017-2636 CVE-2017-7184

Systems running RHCK on Oracle Linux 7, Red Hat Enterprise Linux 7,
CentOS 7, and Scientific Linux 7 can now use Ksplice to patch against
the latest Red Hat kernel update, ELSA-2017-0933.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running OL 7, RHEL 7,
CentOS 7, and Scientific Linux 7 install these updates.

On systems that have "autoinstall = yes" in /etc/uptrack/uptrack.conf,
these updates will be installed automatically and you do not need to
take any action.

Alternatively, you can install these updates by running:

# /usr/sbin/uptrack-upgrade -y


DESCRIPTION

* CVE-2017-2636: Privilege escalation in High Level Data Synchronous TTY line discipline.

A race condition when flushing the transmit queue concurently to sending
frames in the HDLC TTY line discipline could lead to a double free.  A
local, unprivileged user could use this flaw to elevate his privileges.


* CVE-2017-7184: Privilege escalation when using xfrm IP framework.

A missing check when using xfrm IP framework could lead to an out of
bound access. A local attacker could use this flaw to cause a denial of
service or to escalate privilege.


* CVE-2016-8650: NULL pointer dereference in the key management subsystem.

A missing check in the Multiprecision maths library used to implement
RSA digital signature verification could lead to a NULL pointer
dereference. A local user could use this flaw to cause a denial-of-service.


* CVE-2016-9793: Denial-of-service in socket configuration.

Incorrect validation of arguments for the setsockopt ioctl could allow
a local user with CAP_NET_ADMIN privileges to cause memory corruption
or crash the kernel.


* CVE-2017-2618: Information leak in SELinux attribute handling.

An off-by-one error in SELinux attribute handling can cause sensitive
information to be leaked from the kernel. A local attacker could use
this flaw to facilitate an exploit.

SUPPORT

Ksplice support is available at ksplice-support_ww at oracle.com.