[El-errata] New Ksplice updates for UEKR4 4.1.12 on OL6 and OL7 (ELSA-2018-4265)

[Errata Announcements for Oracle Linux]

Synopsis: ELSA-2018-4265 can now be patched using Ksplice
CVEs: CVE-2017-13168 CVE-2018-7757

Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Linux Security Advisory, ELSA-2018-4265.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running UEKR4 4.1.12 on
OL6 and OL7 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-2017-13168: Denial-of-service in sg read/write implementation.

An unsafe implementation of read/write in the sg driver can result in
userspace being able to corrupt Kernel memory. A local user with access
to an sg device could use this flaw to cause undefined behaviour or a
Kernel crash, leading to a denial-of-service.

Orabug: 28824718


* Memory leak in Intel XL710 rx descriptor cleanup.

A failure to properly clean up the rx descriptors in the Intel XL710
driver could lead to a memory leak and possible denial-of-service.

Orabug: 28228724


* CVE-2018-7757: Memory leak when reading invalid_dword_count attribute of SAS Domain Transport driver.

A missing free when reading invalid_dword_count attribute of SAS Domain
Transport driver could lead to a memory leak. A local attacker could use
this flaw to exhaust kernel memory and cause a denial-of-service.

Orabug: 27927687


* Denial-of-service when an I/O error happens while reading OCFS2 block.

A logic error when an I/O error happens while reading OCFS2 block could
lead to a kernel assert. A local attacker could use this flaw to cause a
denial-of-service.

Orabug: 28580543


* Use-after-free while using GRO with Mellanox Technologies 1/10/40Gbit Ethernet driver.

A logic error when using Generic Receive Offload (GRO) with Mellanox
Technologies 1/10/40Gbit Ethernet driver could lead to a use-after-free.
A local attacker could use this flaw to cause a denial-of-service.

Orabug: 28376051


* Invalid memory access during initialization of QLogic QLA2XXX Fibre Channel driver.

A race condition during initialization of QLogic QLA2XXX Fibre Channel
driver could lead to an invalid memory access. A local attacker could
use this flaw to cause a denial-of-service.

Orabug: 28013813


* Denial-of-service when forking a process with hugetlb mappings.

A logic error when forking a process with hugetlb mappings could lead to
a kernel assert. A local attacker could use this flaw to cause a
denial-of-service.

Orabug: 28839992

SUPPORT

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