Test ID:	1.3.6.1.4.1.25623.1.0.844277
Category:	Ubuntu Local Security Checks
Title:	Ubuntu: Security Advisory (USN-4183-2)
Summary:	The remote host is missing an update for the 'linux' package(s) announced via the USN-4183-2 advisory.
Description:	Summary: The remote host is missing an update for the 'linux' package(s) announced via the USN-4183-2 advisory. Vulnerability Insight: USN-4183-1 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. This update addresses the issue. 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) Jann Horn discovered a reference count underflow in the shiftfs implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-15791) Jann Horn discovered a type confusion vulnerability in the shiftfs implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-15792) Jann Horn discovered that the shiftfs implementation in the Linux kernel did not use the correct file system uid/gid when the user namespace of a lower file system is not in the init user namespace. A local attacker could use this to possibly bypass DAC permissions or have some other unspecified impact. (CVE-2019-15793) It was discovered that a buffer overflow existed in the 802.11 Wi-Fi configuration interface for the Linux kernel when handling beacon settings. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-16746) Nico Waisman discovered that a buffer overflow existed in the Realtek Wi-Fi driver for the Linux kernel when handling Notice of Absence ... [Please see the references for more information on the vulnerabilities] Affected Software/OS: 'linux' package(s) on Ubuntu 19.10. 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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