Executive Summary

Summary
Title Linux kernel vulnerabilities
Informations
NameUSN-4008-1First vendor Publication2019-06-04
VendorUbuntuLast vendor Modification2019-06-04
Severity (Vendor) N/ARevisionN/A

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:C/I:C/A:C)
Cvss Base Score9.3Attack RangeNetwork
Cvss Impact Score10Attack ComplexityMedium
Cvss Expoit Score8.6AuthenticationNone Required
Calculate full CVSS 2.0 Vectors scores

Detail

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS

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-kvm: Linux kernel for cloud environments - linux-raspi2: Linux kernel for Raspberry Pi 2 - linux-snapdragon: Linux kernel for Snapdragon processors

Details:

Robert Święcki discovered that the Linux kernel did not properly apply Address Space Layout Randomization (ASLR) in some situations for setuid elf binaries. A local attacker could use this to improve the chances of exploiting an existing vulnerability in a setuid elf binary. (CVE-2019-11190)

It was discovered that a null pointer dereference vulnerability existed in the LSI Logic MegaRAID driver in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2019-11810)

It was discovered that a race condition leading to a use-after-free existed in the Reliable Datagram Sockets (RDS) protocol implementation in the Linux kernel. The RDS protocol is blacklisted by default in Ubuntu. If enabled, a local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-11815)

Federico Manuel Bento discovered that the Linux kernel did not properly apply Address Space Layout Randomization (ASLR) in some situations for setuid a.out binaries. A local attacker could use this to improve the chances of exploiting an existing vulnerability in a setuid a.out binary. (CVE-2019-11191)

As a hardening measure, this update disables a.out support.

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 16.04 LTS:
linux-image-4.4.0-1047-kvm 4.4.0-1047.53
linux-image-4.4.0-1084-aws 4.4.0-1084.94
linux-image-4.4.0-1110-raspi2 4.4.0-1110.118
linux-image-4.4.0-1114-snapdragon 4.4.0-1114.119
linux-image-4.4.0-150-generic 4.4.0-150.176
linux-image-4.4.0-150-generic-lpae 4.4.0-150.176
linux-image-4.4.0-150-lowlatency 4.4.0-150.176
linux-image-4.4.0-150-powerpc-e500mc 4.4.0-150.176
linux-image-4.4.0-150-powerpc-smp 4.4.0-150.176
linux-image-4.4.0-150-powerpc64-emb 4.4.0-150.176
linux-image-4.4.0-150-powerpc64-smp 4.4.0-150.176
linux-image-aws 4.4.0.1084.87
linux-image-generic 4.4.0.150.158
linux-image-generic-lpae 4.4.0.150.158
linux-image-kvm 4.4.0.1047.47
linux-image-lowlatency 4.4.0.150.158
linux-image-powerpc-e500mc 4.4.0.150.158
linux-image-powerpc-smp 4.4.0.150.158
linux-image-powerpc64-emb 4.4.0.150.158
linux-image-powerpc64-smp 4.4.0.150.158
linux-image-raspi2 4.4.0.1110.110
linux-image-snapdragon 4.4.0.1114.106
linux-image-virtual 4.4.0.150.158

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/4008-1
CVE-2019-11190, CVE-2019-11191, CVE-2019-11810, CVE-2019-11815

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.4.0-150.176
https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1084.94
https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1047.53
https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1110.118
https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1114.119

Original Source

Url : http://www.ubuntu.com/usn/USN-4008-1

CWE : Common Weakness Enumeration

%idName
75 %CWE-362Race Condition
25 %CWE-476NULL Pointer Dereference

CPE : Common Platform Enumeration

TypeDescriptionCount
Os3265

Alert History

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0
1
2
DateInformations
2019-06-07 13:21:44
  • Multiple Updates
2019-06-06 05:21:54
  • Multiple Updates
2019-06-05 05:18:56
  • First insertion