Test ID:	1.3.6.1.4.1.25623.1.0.844234
Category:	Ubuntu Local Security Checks
Title:	Ubuntu: Security Advisory (USN-4185-3)
Summary:	The remote host is missing an update for the 'linux, linux-hwe, linux-oem' package(s) announced via the USN-4185-3 advisory.
Description:	Summary: The remote host is missing an update for the 'linux, linux-hwe, linux-oem' package(s) announced via the USN-4185-3 advisory. Vulnerability Insight: USN-4185-1 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 Osterlund, 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 ... [Please see the references for more information on the vulnerabilities] Affected Software/OS: 'linux, linux-hwe, linux-oem' package(s) on Ubuntu 16.04, Ubuntu 18.04. Solution: Please install the updated package(s). CVSS Score: 7.2 CVSS Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2019-0155 Bugtraq: 20191118 [slackware-security] Slackware 14.2 kernel (SSA:2019-320-01) (Google Search) https://seclists.org/bugtraq/2019/Nov/26 http://packetstormsecurity.com/files/155375/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00242.html RedHat Security Advisories: RHSA-2019:3841 https://access.redhat.com/errata/RHSA-2019:3841 RedHat Security Advisories: RHSA-2019:3887 https://access.redhat.com/errata/RHSA-2019:3887 RedHat Security Advisories: RHSA-2019:3889 https://access.redhat.com/errata/RHSA-2019:3889 RedHat Security Advisories: RHSA-2019:3908 https://access.redhat.com/errata/RHSA-2019:3908 RedHat Security Advisories: RHSA-2020:0204 https://access.redhat.com/errata/RHSA-2020:0204 https://usn.ubuntu.com/4186-2/
Copyright	Copyright (C) 2019 Greenbone AG

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