Executive Summary
Summary | |
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Title | Linux kernel vulnerability and regression |
Informations | |||
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Name | USN-4184-2 | 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 | |||
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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) | |||
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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 19.04 - Ubuntu 18.04 LTS Summary: Several issues were fixed in the Linux kernel. Software Description: - linux: Linux kernel - linux-hwe: Linux hardware enablement (HWE) kernel - linux-oem-osp1: Linux kernel for OEM processors Details: USN-4184-1 fixed vulnerabilities in the Linux kernel. It was discovered that the kernel fix for CVE-2019-0155 (i915 missing Blitter Command Streamer check) was incomplete on 64-bit Intel x86 systems. Also, the update introduced a regression that broke KVM guests where extended page tables (EPT) are disabled or not supported. This update addresses both issues. We apologize for the inconvenience. Original advisory details: Stephan van Schaik, Alyssa Milburn, Sebastian Ă–sterlund, Pietro Frigo, It was discovered that the Intel i915 graphics chipsets allowed userspace Deepak Gupta discovered that on certain Intel processors, the Linux kernel It was discovered that the Intel i915 graphics chipsets could cause a Hui Peng discovered that the Atheros AR6004 USB Wi-Fi device driver for the Jann Horn discovered a reference count underflow in the shiftfs Jann Horn discovered a type confusion vulnerability in the shiftfs Jann Horn discovered that the shiftfs implementation in the Linux kernel Ori Nimron discovered that the AX25 network protocol implementation in the Ori Nimron discovered that the IEEE 802.15.4 Low-Rate Wireless network Ori Nimron discovered that the Appletalk network protocol implementation in Ori Nimron discovered that the modular ISDN network protocol implementation Ori Nimron discovered that the Near field Communication (NFC) network Nico Waisman discovered that a buffer overflow existed in the Realtek Wi-Fi Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 19.04: Ubuntu 18.04 LTS: 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: Package Information: |
Original Source
Url : http://www.ubuntu.com/usn/USN-4184-2 |
CWE : Common Weakness Enumeration
% | Id | Name |
---|---|---|
80 % | CWE-276 | Incorrect Default Permissions |
20 % | CWE-476 | NULL Pointer Dereference |
CPE : Common Platform Enumeration
Alert History
Date | Informations |
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2019-11-13 21:19:07 |
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