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-4185-1 First vendor Publication 2019-11-13
Vendor Ubuntu Last vendor Modification 2019-11-13
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:N/I:N/A:C)
Cvss Base Score 7.8 Attack Range Network
Cvss Impact Score 6.9 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 18.04 LTS - Ubuntu 16.04 LTS

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-gke-4.15: Linux kernel for Google Container Engine (GKE) systems - linux-kvm: Linux kernel for cloud environments - linux-oem: Linux kernel for OEM processors - linux-oracle: Linux kernel for Oracle Cloud systems - linux-aws-hwe: Linux kernel for Amazon Web Services (AWS-HWE) systems - 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:

Stephan van Schaik, Alyssa Milburn, Sebastian Ă–sterlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, Cristiano Giuffrida, Giorgi Maisuradze, Moritz Lipp, Michael Schwarz, Daniel Gruss, and Jo Van Bulck discovered that Intel processors using Transactional Synchronization Extensions (TSX) could expose memory contents previously stored in microarchitectural buffers to a malicious process that is executing on the same CPU core. A local attacker could use this to expose sensitive information. (CVE-2019-11135)

It was discovered that the Intel i915 graphics chipsets allowed userspace to modify page table entries via writes to MMIO from the Blitter Command Streamer and expose kernel memory information. A local attacker could use this to expose sensitive information or possibly elevate privileges. (CVE-2019-0155)

Deepak Gupta discovered that on certain Intel processors, the Linux kernel did not properly perform invalidation on page table updates by virtual guest operating systems. A local attacker in a guest VM could use this to cause a denial of service (host system crash). (CVE-2018-12207)

It was discovered that the Intel i915 graphics chipsets could cause a system hang when userspace performed a read from GT memory mapped input output (MMIO) when the product is in certain low power states. A local attacker could use this to cause a denial of service. (CVE-2019-0154)

Hui Peng discovered that the Atheros AR6004 USB Wi-Fi device driver for the Linux kernel did not properly validate endpoint descriptors returned by the device. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2019-15098)

Ori Nimron discovered that the AX25 network protocol implementation in the Linux kernel did not properly perform permissions checks. A local attacker could use this to create a raw socket. (CVE-2019-17052)

Ori Nimron discovered that the IEEE 802.15.4 Low-Rate Wireless network protocol implementation in the Linux kernel did not properly perform permissions checks. A local attacker could use this to create a raw socket. (CVE-2019-17053)

Ori Nimron discovered that the Appletalk network protocol implementation in the Linux kernel did not properly perform permissions checks. A local attacker could use this to create a raw socket. (CVE-2019-17054)

Ori Nimron discovered that the modular ISDN network protocol implementation in the Linux kernel did not properly perform permissions checks. A local attacker could use this to create a raw socket. (CVE-2019-17055)

Ori Nimron discovered that the Near field Communication (NFC) network protocol implementation in the Linux kernel did not properly perform permissions checks. A local attacker could use this to create a raw socket. (CVE-2019-17056)

Nico Waisman discovered that a buffer overflow existed in the Realtek Wi-Fi driver for the Linux kernel when handling Notice of Absence frames. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-17666)

Update instructions:

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

Ubuntu 18.04 LTS:
linux-image-4.15.0-1029-oracle 4.15.0-1029.32
linux-image-4.15.0-1048-gke 4.15.0-1048.51
linux-image-4.15.0-1050-kvm 4.15.0-1050.50
linux-image-4.15.0-1054-aws 4.15.0-1054.56
linux-image-4.15.0-1063-oem 4.15.0-1063.72
linux-image-4.15.0-69-generic 4.15.0-69.78
linux-image-4.15.0-69-generic-lpae 4.15.0-69.78
linux-image-4.15.0-69-lowlatency 4.15.0-69.78
linux-image-aws 4.15.0.1054.55
linux-image-aws-lts-18.04 4.15.0.1054.55
linux-image-generic 4.15.0.69.71
linux-image-generic-lpae 4.15.0.69.71
linux-image-gke 4.15.0.1048.51
linux-image-gke-4.15 4.15.0.1048.51
linux-image-kvm 4.15.0.1050.50
linux-image-lowlatency 4.15.0.69.71
linux-image-oem 4.15.0.1063.67
linux-image-oracle 4.15.0.1029.34
linux-image-oracle-lts-18.04 4.15.0.1029.34
linux-image-powerpc-e500mc 4.15.0.69.71
linux-image-powerpc-smp 4.15.0.69.71
linux-image-powerpc64-emb 4.15.0.69.71
linux-image-powerpc64-smp 4.15.0.69.71
linux-image-virtual 4.15.0.69.71

Ubuntu 16.04 LTS:
linux-image-4.15.0-1029-oracle 4.15.0-1029.32~16.04.1
linux-image-4.15.0-1049-gcp 4.15.0-1049.52
linux-image-4.15.0-1054-aws 4.15.0-1054.56~16.04.1
linux-image-4.15.0-1063-azure 4.15.0-1063.68
linux-image-4.15.0-69-generic 4.15.0-69.78~16.04.1
linux-image-4.15.0-69-generic-lpae 4.15.0-69.78~16.04.1
linux-image-4.15.0-69-lowlatency 4.15.0-69.78~16.04.1
linux-image-aws-hwe 4.15.0.1054.54
linux-image-azure 4.15.0.1063.66
linux-image-gcp 4.15.0.1049.63
linux-image-generic-hwe-16.04 4.15.0.69.89
linux-image-generic-lpae-hwe-16.04 4.15.0.69.89
linux-image-gke 4.15.0.1049.63
linux-image-lowlatency-hwe-16.04 4.15.0.69.89
linux-image-oem 4.15.0.69.89
linux-image-oracle 4.15.0.1029.22
linux-image-virtual-hwe-16.04 4.15.0.69.89

Please note that mitigating the TSX (CVE-2019-11135) and i915 (CVE-2019-0154) issues requires corresponding microcode and graphics firmware updates respectively.

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/4185-1
CVE-2018-12207, CVE-2019-0154, CVE-2019-0155, CVE-2019-11135,
CVE-2019-15098, CVE-2019-17052, CVE-2019-17053, CVE-2019-17054,
CVE-2019-17055, CVE-2019-17056, CVE-2019-17666,
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/TAA_MCEPSC_i915

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.15.0-69.78
https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1054.56
https://launchpad.net/ubuntu/+source/linux-gke-4.15/4.15.0-1048.51
https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1050.50
https://launchpad.net/ubuntu/+source/linux-oem/4.15.0-1063.72
https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1029.32
https://launchpad.net/ubuntu/+source/linux-aws-hwe/4.15.0-1054.56~16.04.1
https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1063.68
https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1049.52
https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-69.78~16.04.1
https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1029.32~16.04.1

Original Source

Url : http://www.ubuntu.com/usn/USN-4185-1

CWE : Common Weakness Enumeration

% Id Name
57 % CWE-276 Incorrect Default Permissions
14 % CWE-476 NULL Pointer Dereference
14 % CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') (CWE/SANS Top 25)
14 % CWE-20 Improper Input Validation

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 1
Application 1
Application 1
Application 1
Os 3
Os 3327
Os 2

Alert History

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0
Date Informations
2019-11-13 05:19:18
  • First insertion