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AUSCERT External Security Bulletin Redistribution
ESB-2018.1922
Linux kernel vulnerabilities patched in some Ubuntu versions
3 July 2018
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: linux
linux-raspi2
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Access Privileged Data -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2018-11508 CVE-2018-7757 CVE-2018-7755
CVE-2018-6927 CVE-2018-5803 CVE-2018-5750
CVE-2018-1130
Reference: ASB-2018.0145
ESB-2018.1917
ESB-2018.1549
ESB-2018.0533.2
Original Bulletin:
http://www.ubuntu.com/usn/usn-3697-1
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==========================================================================
Ubuntu Security Notice USN-3697-1
July 02, 2018
linux, linux-raspi2 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- - Ubuntu 17.10
Summary:
Several security issues were fixed in the Linux kernel.
Software Description:
- - linux: Linux kernel
- - linux-raspi2: Linux kernel for Raspberry Pi 2
Details:
It was discovered that a null pointer dereference vulnerability existed in
the DCCP protocol implementation in the Linux kernel. A local attacker
could use this to cause a denial of service (system crash). (CVE-2018-1130)
Jann Horn discovered that the 32 bit adjtimex() syscall implementation for
64 bit Linux kernels did not properly initialize memory returned to user
space in some situations. A local attacker could use this to expose
sensitive information (kernel memory). (CVE-2018-11508)
Wang Qize discovered that an information disclosure vulnerability existed
in the SMBus driver for ACPI Embedded Controllers in the Linux kernel. A
local attacker could use this to expose sensitive information (kernel
pointer addresses). (CVE-2018-5750)
It was discovered that the SCTP Protocol implementation in the Linux kernel
did not properly validate userspace provided payload lengths in some
situations. A local attacker could use this to cause a denial of service
(system crash). (CVE-2018-5803)
It was discovered that an integer overflow error existed in the futex
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash). (CVE-2018-6927)
It was discovered that an information leak vulnerability existed in the
floppy driver in the Linux kernel. A local attacker could use this to
expose sensitive information (kernel memory). (CVE-2018-7755)
It was discovered that a memory leak existed in the SAS driver subsystem of
the Linux kernel. A local attacker could use this to cause a denial of
service (memory exhaustion). (CVE-2018-7757)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 17.10:
linux-image-4.13.0-1023-raspi2 4.13.0-1023.24
linux-image-4.13.0-46-generic 4.13.0-46.51
linux-image-4.13.0-46-generic-lpae 4.13.0-46.51
linux-image-4.13.0-46-lowlatency 4.13.0-46.51
linux-image-generic 4.13.0.46.49
linux-image-generic-lpae 4.13.0.46.49
linux-image-lowlatency 4.13.0.46.49
linux-image-raspi2 4.13.0.1023.21
After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.
References:
https://usn.ubuntu.com/usn/usn-3697-1
CVE-2018-1130, CVE-2018-11508, CVE-2018-5750, CVE-2018-5803,
CVE-2018-6927, CVE-2018-7755, CVE-2018-7757
Package Information:
https://launchpad.net/ubuntu/+source/linux/4.13.0-46.51
https://launchpad.net/ubuntu/+source/linux-raspi2/4.13.0-1023.24
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