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-4076-1 First vendor Publication 2019-07-25
Vendor Ubuntu Last vendor Modification 2019-07-25
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
 
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Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:C/I:C/A:C)
Cvss Base Score 9.3 Attack Range Network
Cvss Impact Score 10 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
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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

Details:

It was discovered that a race condition existed in the Serial Attached SCSI (SAS) implementation in the Linux kernel. A local attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2018-20836)

It was discovered that the ext4 file system implementation in the Linux kernel did not properly zero out memory in some situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2019-11833)

It was discovered that the Bluetooth Human Interface Device Protocol (HIDP) implementation in the Linux kernel did not properly verify strings were NULL terminated in certain situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2019-11884)

It was discovered that the Linux kernel on ARM processors allowed a tracing process to modify a syscall after a seccomp decision had been made on that syscall. A local attacker could possibly use this to bypass seccomp restrictions. (CVE-2019-2054)

Hugues Anguelkov discovered that the Broadcom Wifi driver in the Linux kernel did not properly prevent remote firmware events from being processed for USB Wifi devices. A physically proximate attacker could use this to send firmware events to the device. (CVE-2019-9503)

It was discovered that an integer overflow existed in the Freescale (PowerPC) hypervisor manager in the Linux kernel. A local attacker with write access to /dev/fsl-hv could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-10142)

Update instructions:

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

Ubuntu 16.04 LTS:
linux-image-4.4.0-1052-kvm 4.4.0-1052.59
linux-image-4.4.0-1088-aws 4.4.0-1088.99
linux-image-4.4.0-1117-raspi2 4.4.0-1117.126
linux-image-4.4.0-157-generic 4.4.0-157.185
linux-image-4.4.0-157-generic-lpae 4.4.0-157.185
linux-image-4.4.0-157-lowlatency 4.4.0-157.185
linux-image-4.4.0-157-powerpc-e500mc 4.4.0-157.185
linux-image-4.4.0-157-powerpc-smp 4.4.0-157.185
linux-image-4.4.0-157-powerpc64-emb 4.4.0-157.185
linux-image-4.4.0-157-powerpc64-smp 4.4.0-157.185
linux-image-aws 4.4.0.1088.91
linux-image-generic 4.4.0.157.165
linux-image-generic-lpae 4.4.0.157.165
linux-image-kvm 4.4.0.1052.52
linux-image-lowlatency 4.4.0.157.165
linux-image-powerpc-e500mc 4.4.0.157.165
linux-image-powerpc-smp 4.4.0.157.165
linux-image-powerpc64-emb 4.4.0.157.165
linux-image-powerpc64-smp 4.4.0.157.165
linux-image-raspi2 4.4.0.1117.117
linux-image-virtual 4.4.0.157.165

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/4076-1
CVE-2018-20836, CVE-2019-10142, CVE-2019-11833, CVE-2019-11884,
CVE-2019-2054, CVE-2019-9503

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.4.0-157.185
https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1088.99
https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1052.59
https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1117.126

Original Source

Url : http://www.ubuntu.com/usn/USN-4076-1

CWE : Common Weakness Enumeration

% Id Name
33 % CWE-416 Use After Free
33 % CWE-362 Race Condition
33 % CWE-190 Integer Overflow or Wraparound (CWE/SANS Top 25)

CPE : Common Platform Enumeration

TypeDescriptionCount
Os 1
Os 3301

Alert History

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0
1
Date Informations
2019-08-02 12:13:52
  • Multiple Updates
2019-07-26 00:18:52
  • First insertion