Executive Summary
| Summary | |
|---|---|
| Title | Linux kernel (HWE) vulnerabilities |
| Informations | |||
|---|---|---|---|
| Name | USN-3931-2 | First vendor Publication | 2019-04-02 |
| Vendor | Ubuntu | Last vendor Modification | 2019-04-02 |
| 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 16.04 LTS - Ubuntu 14.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - 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 - linux-oracle: Linux kernel for Oracle Cloud systems Details: USN-3931-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 18.04 LTS for Ubuntu 16.04 LTS and for the Linux Azure kernel for Ubuntu 14.04 LTS. M. Vefa Bicakci and Andy Lutomirski discovered that the kernel did not properly set up all arguments to an error handler callback used when running as a paravirtualized guest. An unprivileged attacker in a paravirtualized guest VM could use this to cause a denial of service (guest VM crash). (CVE-2018-14678) It was discovered that the KVM implementation in the Linux kernel on ARM 64bit processors did not properly handle some ioctls. An attacker with the privilege to create KVM-based virtual machines could use this to cause a denial of service (host system crash) or execute arbitrary code in the host. (CVE-2018-18021) Mathias Payer and Hui Peng discovered a use-after-free vulnerability in the Advanced Linux Sound Architecture (ALSA) subsystem. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2018-19824) Shlomi Oberman, Yuli Shapiro, and Ran Menscher discovered an information leak in the Bluetooth implementation of the Linux kernel. An attacker within Bluetooth range could use this to expose sensitive information (kernel memory). (CVE-2019-3459, CVE-2019-3460) Jann Horn discovered that the KVM implementation in the Linux kernel contained a use-after-free vulnerability. An attacker in a guest VM with access to /dev/kvm could use this to cause a denial of service (guest VM crash). (CVE-2019-6974) Jim Mattson and Felix Wilhelm discovered a use-after-free vulnerability in the KVM subsystem of the Linux kernel, when using nested virtual machines. A local attacker in a guest VM could use this to cause a denial of service (system crash) or possibly execute arbitrary code in the host system. (CVE-2019-7221) Felix Wilhelm discovered that an information leak vulnerability existed in the KVM subsystem of the Linux kernel, when nested virtualization is used. A local attacker could use this to expose sensitive information (host system memory to a guest VM). (CVE-2019-7222) Jann Horn discovered that the eBPF implementation in the Linux kernel was insufficiently hardened against Spectre V1 attacks. A local attacker could use this to expose sensitive information. (CVE-2019-7308) It was discovered that a use-after-free vulnerability existed in the user- space API for crypto (af_alg) 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-2019-8912) It was discovered that the Linux kernel did not properly deallocate memory when handling certain errors while reading files. A local attacker could use this to cause a denial of service (excessive memory consumption). (CVE-2019-8980) Jann Horn discovered that the mmap implementation in the Linux kernel did not properly check for the mmap minimum address in some situations. A local attacker could use this to assist exploiting a kernel NULL pointer dereference vulnerability. (CVE-2019-9213) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 LTS: Ubuntu 14.04 LTS: 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-3931-2 |
CWE : Common Weakness Enumeration
| % | Id | Name |
|---|---|---|
| 33 % | CWE-416 | Use After Free |
| 17 % | CWE-20 | Improper Input Validation |
| 8 % | CWE-665 | Improper Initialization |
| 8 % | CWE-476 | NULL Pointer Dereference |
| 8 % | CWE-401 | Failure to Release Memory Before Removing Last Reference ('Memory Leak') |
| 8 % | CWE-362 | Race Condition |
| 8 % | CWE-189 | Numeric Errors (CWE/SANS Top 25) |
| 8 % | CWE-125 | Out-of-bounds Read |
CPE : Common Platform Enumeration
Nessus® Vulnerability Scanner
| Date | Description |
|---|---|
| 2019-01-17 | Name : The remote Fedora host is missing one or more security updates. File : fedora_2019-509c133845.nasl - Type : ACT_GATHER_INFO |
| 2019-01-17 | Name : The remote Fedora host is missing one or more security updates. File : fedora_2019-f812c9fb22.nasl - Type : ACT_GATHER_INFO |
| 2019-01-03 | Name : The remote Fedora host is missing one or more security updates. File : fedora_2018-5904d0794d.nasl - Type : ACT_GATHER_INFO |
| 2019-01-03 | Name : The remote Fedora host is missing one or more security updates. File : fedora_2018-a0914af224.nasl - Type : ACT_GATHER_INFO |
| 2019-01-03 | Name : The remote Fedora host is missing one or more security updates. File : fedora_2018-cc812838fb.nasl - Type : ACT_GATHER_INFO |
| 2019-01-03 | Name : The remote Fedora host is missing one or more security updates. File : fedora_2018-ddbaca855e.nasl - Type : ACT_GATHER_INFO |
| 2019-01-03 | Name : The remote Fedora host is missing one or more security updates. File : fedora_2018-f392ab8c84.nasl - Type : ACT_GATHER_INFO |
| 2018-11-09 | Name : The remote Amazon Linux 2 host is missing a security update. File : al2_ALAS-2018-1100.nasl - Type : ACT_GATHER_INFO |
| 2018-11-08 | Name : The remote Amazon Linux AMI host is missing a security update. File : ala_ALAS-2018-1100.nasl - Type : ACT_GATHER_INFO |
| 2018-10-11 | Name : The remote Fedora host is missing one or more security updates. File : fedora_2018-94315e9a6b.nasl - Type : ACT_GATHER_INFO |
| 2018-10-10 | Name : The remote Debian host is missing a security-related update. File : debian_DSA-4313.nasl - Type : ACT_GATHER_INFO |
| 2018-10-04 | Name : The remote Debian host is missing a security update. File : debian_DLA-1531.nasl - Type : ACT_GATHER_INFO |
| 2018-10-02 | Name : The remote Debian host is missing a security-related update. File : debian_DSA-4308.nasl - Type : ACT_GATHER_INFO |
| 2018-08-06 | Name : The remote Fedora host is missing one or more security updates. File : fedora_2018-49bda79bd5.nasl - Type : ACT_GATHER_INFO |
Alert History
| Date | Informations |
|---|---|
| 2019-04-12 17:21:35 |
|
| 2019-04-03 05:21:28 |
|
| 2019-04-03 05:18:40 |
|
