[Ksplice][Ubuntu-Oracle-Updates] New Ksplice updates for Ubuntu OCI kernel (USN-4660-1)

[Oracle Ksplice]

Synopsis: USN-4660-1 can now be patched using Ksplice
CVEs: CVE-2020-14351 CVE-2020-14390 CVE-2020-25211 CVE-2020-25284 CVE-2020-25285 CVE-2020-25641 CVE-2020-25643 CVE-2020-25645 CVE-2020-28915

Systems running Ubuntu OCI kernel can now use Ksplice to patch against
the latest Ubuntu Security Notice, USN-4660-1.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running Ubuntu OCI
kernel 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-2020-25641: Denial-of-service in biovec when zero-length biovec is issued.

A flaw in biovec implementation could cause the system to enter
an infinite loop when a zero-length biovec request is issued to
the block subsystem. A local, non privileged user could exploit
this vulnerability to cause a denial-of-service.


* CVE-2020-25643: Memory corruption in WAN HDLC-PPP due to missing error checking.

A missing error handling code in WAN HDLC-PPP implementation could lead
to a memory corruption. A local user could use this flaw to cause
a denial-of-service or an arbitrary code execution.


* CVE-2020-25285: Denial-of-service in sysctls of Linux Memory Manager.

A race condition in sysctls of Linux Kernel Virtual Memory Manager
could lead to NULL pointer dereference. A local attacker could use
this flaw to cause a denial-of-service.


* CVE-2020-25645: Possible information leak between encrypted geneve endpoints.

A logic error may end up inadvertently transmitting data between two
geneve endpoints unencrypted. This may allow unintended parties to view
confidential network data.


* CVE-2020-25211: Denial-of-service in Netfilter due to out-of-bounds memory access.

A flaw in Netfilter framework implementation could lead to
a out-of-bounds memory access. A local user could use this flaw to cause
a system crash and a denial-of-service.


* CVE-2020-14390: Memory corruption when resizing the framebuffer.

A logic error when handling framebuffer resizing and scrollbacks could
lead to memory corruption.  A local user could use this to cause a
denial-of-service or possibly arbitrary code execution or privilege
escalation.


* CVE-2020-25284: Permission bypass when creating or removing a Rados block device.

A non-comprehensive privilege check may allow to create or remove Rados
block devices. A privileged use in a user namespace with user id zero
could use this flaw to cause a denial-of-service.


* CVE-2020-14351: Privilege escalation in perf subsystem due to use-after-free.

A flaw in the perf subsystem could lead to a use-after-free memory
error. This flaw could allow a local attacker with permission to monitor
perf events to corrupt memory and possibly escalate privileges.


* CVE-2020-28915: Information leak due to out-of-bounds read in Framebuffer Console.

A flaw in the font handling code of the Framebuffer Console could lead to
an out-of-bounds read of kernel memory. A local attacker could use this
flaw to cause an information leak and the system's memory disclosure.

SUPPORT

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