The following updates has been released for Ubuntu Linux:
USN-3718-1: Linux kernel regression
USN-3718-2: Linux kernel (HWE) regression
USN-3719-2: Mutt vulnerabilities
USN-3720-1: python-cryptography vulnerability
USN-3718-1: Linux kernel regression
USN-3718-2: Linux kernel (HWE) regression
USN-3719-2: Mutt vulnerabilities
USN-3720-1: python-cryptography vulnerability
USN-3718-1: Linux kernel regression
=========================================================================
Ubuntu Security Notice USN-3718-1
July 21, 2018
linux, linux-aws, linux-azure, linux-gcp, linux-kvm, linux-oem regression
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.04 LTS
Summary:
A regression that caused boot failures was fixed in the Linux kernel.
Software Description:
- linux: Linux kernel
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-kvm: Linux kernel for cloud environments
- linux-oem: Linux kernel for OEM processors
Details:
USN-3695-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04
LTS. Unfortunately, the fix for CVE-2018-1108 introduced a regression
where insufficient early entropy prevented services from starting,
leading in some situations to a failure to boot, This update addresses
the issue.
We apologize for the inconvenience.
Original advisory details:
Jann Horn discovered that the Linux kernel's implementation of random
seed data reported that it was in a ready state before it had gathered
sufficient entropy. An attacker could use this to expose sensitive
information. (CVE-2018-1108)
Wen Xu discovered that the ext4 file system implementation in the Linux
kernel did not properly initialize the crc32c checksum driver. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2018-1094)
It was discovered that the cdrom driver in the Linux kernel contained an
incorrect bounds check. A local attacker could use this to expose sensitive
information (kernel memory). (CVE-2018-10940)
Wen Xu discovered that the ext4 file system implementation in the Linux
kernel did not properly validate xattr sizes. A local attacker could use
this to cause a denial of service (system crash). (CVE-2018-1095)
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)
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)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 18.04 LTS:
linux-image-4.15.0-1014-gcp 4.15.0-1014.14
linux-image-4.15.0-1016-aws 4.15.0-1016.16
linux-image-4.15.0-1016-kvm 4.15.0-1016.16
linux-image-4.15.0-1018-azure 4.15.0-1018.18
linux-image-4.15.0-29-generic 4.15.0-29.31
linux-image-4.15.0-29-generic-lpae 4.15.0-29.31
linux-image-4.15.0-29-lowlatency 4.15.0-29.31
linux-image-4.15.0-29-snapdragon 4.15.0-29.31
linux-image-aws 4.15.0.1016.16
linux-image-azure 4.15.0.1018.18
linux-image-gcp 4.15.0.1014.16
linux-image-generic 4.15.0.29.31
linux-image-generic-lpae 4.15.0.29.31
linux-image-gke 4.15.0.1014.16
linux-image-kvm 4.15.0.1016.16
linux-image-lowlatency 4.15.0.29.31
linux-image-oem 4.15.0.1012.14
linux-image-snapdragon 4.15.0.29.31
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-3718-1
https://launchpad.net/bugs/1779827, https://usn.ubuntu.com/usn/usn-3695-1
Package Information:
https://launchpad.net/ubuntu/+source/linux/4.15.0-29.31
https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1016.16
https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1018.18
https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1014.14
https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1016.16
https://launchpad.net/ubuntu/+source/linux-oem/4.15.0-1012.15
USN-3718-2: Linux kernel (HWE) regression
=========================================================================
Ubuntu Security Notice USN-3718-2
July 21, 2018
linux-hwe, linux-azure, linux-gcp regression
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.04 LTS
Summary:
A regression that caused boot failures was fixed in the Linux kernel.
Software Description:
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-hwe: Linux hardware enablement (HWE) kernel
Details:
USN-3695-2 fixed vulnerabilities in the Linux Hardware Enablement
Kernel (HWE) kernel for Ubuntu 16.04 LTS. Unfortunately, the fix
for CVE-2018-1108 introduced a regression where insufficient early
entropy prevented services from starting, leading in some situations
to a failure to boot, This update addresses the issue.
We apologize for the inconvenience.
Original advisory details:
Jann Horn discovered that the Linux kernel's implementation of random
seed data reported that it was in a ready state before it had gathered
sufficient entropy. An attacker could use this to expose sensitive
information. (CVE-2018-1108)
Wen Xu discovered that the ext4 file system implementation in the Linux
kernel did not properly initialize the crc32c checksum driver. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2018-1094)
It was discovered that the cdrom driver in the Linux kernel contained an
incorrect bounds check. A local attacker could use this to expose sensitive
information (kernel memory). (CVE-2018-10940)
Wen Xu discovered that the ext4 file system implementation in the Linux
kernel did not properly validate xattr sizes. A local attacker could use
this to cause a denial of service (system crash). (CVE-2018-1095)
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)
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)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 16.04 LTS:
linux-image-4.15.0-1014-gcp 4.15.0-1014.14~16.04.1
linux-image-4.15.0-1018-azure 4.15.0-1018.18~16.04.1
linux-image-4.15.0-29-generic 4.15.0-29.31~16.04.1
linux-image-4.15.0-29-generic-lpae 4.15.0-29.31~16.04.1
linux-image-4.15.0-29-lowlatency 4.15.0-29.31~16.04.1
linux-image-azure 4.15.0.1018.24
linux-image-gcp 4.15.0.1014.26
linux-image-generic-hwe-16.04 4.13.0.45.64
linux-image-generic-lpae-hwe-16.04 4.13.0.45.64
linux-image-gke 4.15.0.1014.26
linux-image-lowlatency-hwe-16.04 4.13.0.45.64
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-3718-2
https://usn.ubuntu.com/usn/usn-3718-1
https://launchpad.net/bugs/1779827, https://usn.ubuntu.com/usn/usn-3695-2
Package Information:
https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1018.18~16.04.1
https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1014.14~16.04.1
https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-29.31~16.04.1
USN-3719-2: Mutt vulnerabilities
==========================================================================
Ubuntu Security Notice USN-3719-2
July 23, 2018
mutt vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 ESM
Summary:
Several security issues were fixed in Mutt.
Software Description:
- mutt: text-based mailreader supporting MIME, GPG, PGP and threading
Details:
USN-3719-1 fixed a vulnerability in Mutt. This update provides
the corresponding update for Ubuntu 12.04 ESM.
Original advisory details:
It was discovered that Mutt incorrectly handled certain requests.
An attacker could possibly use this to execute arbitrary code.
(CVE-2018-14350, CVE-2018-14352, CVE-2018-14354, CVE-2018-14359,
CVE-2018-14358, CVE-2018-14353 ,CVE-2018-14357)
It was discovered that Mutt incorrectly handled certain inputs.
An attacker could possibly use this to access or expose sensitive
information. (CVE-2018-14355, CVE-2018-14356, CVE-2018-14351,
CVE-2018-14362, CVE-2018-14349)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 12.04 ESM:
mutt 1.5.21-5ubuntu2.3
mutt-patched 1.5.21-5ubuntu2.3
After a standard system update you need to restart mutt to make
all the necessary changes.
References:
https://usn.ubuntu.com/usn/usn-3719-2
https://usn.ubuntu.com/usn/usn-3719-1
CVE-2018-14349, CVE-2018-14350, CVE-2018-14351, CVE-2018-14352,
CVE-2018-14353, CVE-2018-14354, CVE-2018-14355, CVE-2018-14356,
CVE-2018-14357, CVE-2018-14358, CVE-2018-14359, CVE-2018-14362
USN-3720-1: python-cryptography vulnerability
==========================================================================
Ubuntu Security Notice USN-3720-1
July 23, 2018
python-cryptography vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.04 LTS
Summary:
python-cryptography could be made to expose sensitive information
if it received a specially crafted input.
Software Description:
- python-cryptography: Cryptography Python library
Details:
It was discovered that python-cryptography incorrectly handled certain
inputs. An attacker could possibly use this to get access to sensitive
information.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 18.04 LTS:
python-cryptography 2.1.4-1ubuntu1.2
python3-cryptography 2.1.4-1ubuntu1.2
In general, a standard system update will make all the necessary
changes.
References:
https://usn.ubuntu.com/usn/usn-3720-1
CVE-2018-10903
Package Information:
https://launchpad.net/ubuntu/+source/python-cryptography/2.1.4-1ubuntu1.2
