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-3930-1 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 18.10

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-azure: Linux kernel for Microsoft Azure Cloud systems - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems - linux-kvm: Linux kernel for cloud environments - linux-raspi2: Linux kernel for Raspberry Pi 2

Details:

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)

Jakub Jirasek discovered a use-after-free vulnerability in the SCTP 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-2019-8956)

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)

It was discovered that a use-after-free vulnerability existed in the IPMI implementation in the Linux kernel. A local attacker with access to the IPMI character device files could use this to cause a denial of service (system crash). (CVE-2019-9003)

Jann Horn discovered that the SNMP NAT implementation in the Linux kernel performed insufficient ASN.1 length checks. An attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-9162)

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 18.10:
linux-image-4.18.0-1008-gcp 4.18.0-1008.9
linux-image-4.18.0-1009-kvm 4.18.0-1009.9
linux-image-4.18.0-1011-raspi2 4.18.0-1011.13
linux-image-4.18.0-1012-aws 4.18.0-1012.14
linux-image-4.18.0-1014-azure 4.18.0-1014.14
linux-image-4.18.0-17-generic 4.18.0-17.18
linux-image-4.18.0-17-generic-lpae 4.18.0-17.18
linux-image-4.18.0-17-lowlatency 4.18.0-17.18
linux-image-4.18.0-17-snapdragon 4.18.0-17.18
linux-image-aws 4.18.0.1012.12
linux-image-azure 4.18.0.1014.15
linux-image-gcp 4.18.0.1008.8
linux-image-generic 4.18.0.17.18
linux-image-generic-lpae 4.18.0.17.18
linux-image-gke 4.18.0.1008.8
linux-image-kvm 4.18.0.1009.9
linux-image-lowlatency 4.18.0.17.18
linux-image-raspi2 4.18.0.1011.8
linux-image-snapdragon 4.18.0.17.18
linux-image-virtual 4.18.0.17.18

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/usn/usn-3930-1
CVE-2018-19824, CVE-2019-3459, CVE-2019-3460, CVE-2019-6974,
CVE-2019-7221, CVE-2019-7222, CVE-2019-7308, CVE-2019-8912,
CVE-2019-8956, CVE-2019-8980, CVE-2019-9003, CVE-2019-9162,
CVE-2019-9213

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.18.0-17.18
https://launchpad.net/ubuntu/+source/linux-aws/4.18.0-1012.14
https://launchpad.net/ubuntu/+source/linux-azure/4.18.0-1014.14
https://launchpad.net/ubuntu/+source/linux-gcp/4.18.0-1008.9
https://launchpad.net/ubuntu/+source/linux-kvm/4.18.0-1009.9
https://launchpad.net/ubuntu/+source/linux-raspi2/4.18.0-1011.13

Original Source

Url : http://www.ubuntu.com/usn/USN-3930-1

CWE : Common Weakness Enumeration

% Id Name
43 % CWE-416 Use After Free
14 % CWE-787 Out-of-bounds Write (CWE/SANS Top 25)
7 % CWE-476 NULL Pointer Dereference
7 % CWE-401 Failure to Release Memory Before Removing Last Reference ('Memory Leak')
7 % CWE-362 Race Condition
7 % CWE-189 Numeric Errors (CWE/SANS Top 25)
7 % CWE-125 Out-of-bounds Read
7 % CWE-20 Improper Input Validation

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 134
Application 122
Application 124
Application 117
Application 143
Application 87
Application 111
Application 136
Application 133
Application 137
Application 122
Application 97
Application 7
Application 1
Application 1
Application 1
Application 1
Application 1
Application 1
Application 1
Application 1
Hardware 7
Hardware 6
Os 8
Os 1
Os 2
Os 3454
Os 2
Os 4
Os 1
Os 5
Os 2
Os 2
Os 3
Os 3
Os 1
Os 5
Os 1
Os 5
Os 1
Os 1

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

Alert History

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0
1
2
Date Informations
2019-04-12 17:21:35
  • Multiple Updates
2019-04-03 05:21:28
  • Multiple Updates
2019-04-03 05:18:39
  • First insertion