Executive Summary



This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Summary
Title Linux kernel vulnerabilities
Informations
Name USN-3979-1 First vendor Publication 2019-05-14
Vendor Ubuntu Last vendor Modification 2019-05-14
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:C/I:C/A:C)
Cvss Base Score 10 Attack Range Network
Cvss Impact Score 10 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 19.04

Summary:

Several security issues were 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-raspi2: Linux kernel for Raspberry Pi 2

Details:

Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Giorgi Maisuradze, Dan Horea Lutas, Andrei Lutas, Volodymyr Pikhur, Stephan van Schaik, Alyssa Milburn, Sebastian Österlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, Cristiano Giuffrida, Moritz Lipp, Michael Schwarz, and Daniel Gruss discovered that memory previously stored in microarchitectural fill buffers of an Intel CPU core may be exposed to a malicious process that is executing on the same CPU core. A local attacker could use this to expose sensitive information. (CVE-2018-12130)

Brandon Falk, Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Stephan van Schaik, Alyssa Milburn, Sebastian Österlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, and Cristiano Giuffrida discovered that memory previously stored in microarchitectural load ports of an Intel CPU core may be exposed to a malicious process that is executing on the same CPU core. A local attacker could use this to expose sensitive information. (CVE-2018-12127)

Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Marina Minkin, Daniel Moghimi, Moritz Lipp, Michael Schwarz, Jo Van Bulck, Daniel Genkin, Daniel Gruss, Berk Sunar, Frank Piessens, and Yuval Yarom discovered that memory previously stored in microarchitectural store buffers of an Intel CPU core may be exposed to a malicious process that is executing on the same CPU core. A local attacker could use this to expose sensitive information. (CVE-2018-12126)

Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Volodrmyr Pikhur, Moritz Lipp, Michael Schwarz, Daniel Gruss, Stephan van Schaik, Alyssa Milburn, Sebastian Österlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, and Cristiano Giuffrida discovered that uncacheable memory previously stored in microarchitectural buffers of an Intel CPU core may be exposed to a malicious process that is executing on the same CPU core. A local attacker could use this to expose sensitive information. (CVE-2019-11091)

It was discovered that the IPv4 generic receive offload (GRO) for UDP implementation in the Linux kernel did not properly handle padded packets. A remote attacker could use this to cause a denial of service (system crash). (CVE-2019-11683)

It was discovered that a race condition existed in the Binder IPC driver for the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-1999)

Matteo Croce, Natale Vinto, and Andrea Spagnolo discovered that the cgroups subsystem of the Linux kernel did not properly account for SCTP socket buffers. A local attacker could use this to cause a denial of service (system crash). (CVE-2019-3874)

Alex Williamson discovered that the vfio subsystem of the Linux kernel did not properly limit DMA mappings. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2019-3882)

Marc Orr discovered that the KVM hypervisor implementation in the Linux kernel did not properly restrict APIC MSR register values when nested virtualization is used. An attacker in a guest vm could use this to cause a denial of service (host OS crash). (CVE-2019-3887)

Hugues Anguelkov discovered that the Broadcom Wifi driver in the Linux kernel contained a head puffer overflow. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-9500)

Hugues Anguelkov discovered that the Broadcom Wifi driver in the Linux kernel did not properly prevent remote firmware events from being processed for USB Wifi devices. A physically proximate attacker could use this to send firmware events to the device. (CVE-2019-9503)

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 19.04:
linux-image-5.0.0-1006-aws 5.0.0-1006.6
linux-image-5.0.0-1006-azure 5.0.0-1006.6
linux-image-5.0.0-1006-gcp 5.0.0-1006.6
linux-image-5.0.0-1006-kvm 5.0.0-1006.6
linux-image-5.0.0-1008-raspi2 5.0.0-1008.8
linux-image-5.0.0-15-generic 5.0.0-15.16
linux-image-5.0.0-15-generic-lpae 5.0.0-15.16
linux-image-5.0.0-15-lowlatency 5.0.0-15.16
linux-image-aws 5.0.0.1006.6
linux-image-azure 5.0.0.1006.6
linux-image-gcp 5.0.0.1006.6
linux-image-generic 5.0.0.15.16
linux-image-generic-lpae 5.0.0.15.16
linux-image-gke 5.0.0.1006.6
linux-image-kvm 5.0.0.1006.6
linux-image-lowlatency 5.0.0.15.16
linux-image-raspi2 5.0.0.1008.5
linux-image-virtual 5.0.0.15.16

After a standard system update you need to reboot your computer to make all the necessary changes.

Please note that fully mitigating the Microarchitectural Data Sampling (MDS) issues (CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, and CVE-2019-11091) requires corresponding processor microcode/firmware updates or, in virtual environments, hypervisor updates.

References:
https://usn.ubuntu.com/usn/usn-3979-1
CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, CVE-2019-11091,
CVE-2019-11683, CVE-2019-1999, CVE-2019-3874, CVE-2019-3882,
CVE-2019-3887, CVE-2019-9500, CVE-2019-9503,
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/MDS

Package Information:
https://launchpad.net/ubuntu/+source/linux/5.0.0-15.16
https://launchpad.net/ubuntu/+source/linux-aws/5.0.0-1006.6
https://launchpad.net/ubuntu/+source/linux-azure/5.0.0-1006.6
https://launchpad.net/ubuntu/+source/linux-gcp/5.0.0-1006.6
https://launchpad.net/ubuntu/+source/linux-kvm/5.0.0-1006.6
https://launchpad.net/ubuntu/+source/linux-raspi2/5.0.0-1008.8

Original Source

Url : http://www.ubuntu.com/usn/USN-3979-1

CWE : Common Weakness Enumeration

% Id Name
43 % CWE-200 Information Exposure
14 % CWE-787 Out-of-bounds Write (CWE/SANS Top 25)
14 % CWE-770 Allocation of Resources Without Limits or Throttling
14 % CWE-415 Double Free
14 % CWE-20 Improper Input Validation

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 1
Application 1
Application 1
Application 1
Application 1
Application 1
Application 1
Os 5
Os 3
Os 1
Os 1
Os 1
Os 1
Os 1
Os 1
Os 3276
Os 3
Os 1

Alert History

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0
1
Date Informations
2019-05-31 12:12:32
  • Multiple Updates
2019-05-15 00:18:45
  • First insertion