Executive Summary

Summary
Title Linux kernel (HWE) update
Informations
Name USN-4041-2 First vendor Publication 2019-06-29
Vendor Ubuntu Last vendor Modification 2019-06-29
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:P)
Cvss Base Score 5 Attack Range Network
Cvss Impact Score 2.9 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 14.04 ESM

Summary:

Several security issues were fixed in the Linux kernel.

Software Description: - linux-aws: Linux kernel for Amazon Web Services (AWS) systems - linux-azure: Linux kernel for Microsoft Azure Cloud systems - linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty

Details:

USN-4041-1 provided updates for the Linux kernel in Ubuntu. This update provides the corresponding updates for the Linux kernel for Ubuntu 16.04 ESM.

USN-4017-2 fixed vulnerabilities in the Linux kernel. Unfortunately, the update introduced a regression that interfered with networking applications that setup very low SO_SNDBUF values. This update fixes the problem.

We apologize for the inconvenience.

Jonathan Looney discovered that the Linux kernel could be coerced into segmenting responses into multiple TCP segments. A remote attacker could construct an ongoing sequence of requests to cause a denial of service. (CVE-2019-11479)

Update instructions:

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

Ubuntu 14.04 ESM:
linux-image-4.15.0-1049-azure 4.15.0-1049.54~14.04.1
linux-image-4.4.0-1048-aws 4.4.0-1048.52
linux-image-4.4.0-154-generic 4.4.0-154.181~14.04.1
linux-image-4.4.0-154-generic-lpae 4.4.0-154.181~14.04.1
linux-image-4.4.0-154-lowlatency 4.4.0-154.181~14.04.1
linux-image-4.4.0-154-powerpc-e500mc 4.4.0-154.181~14.04.1
linux-image-4.4.0-154-powerpc-smp 4.4.0-154.181~14.04.1
linux-image-4.4.0-154-powerpc64-emb 4.4.0-154.181~14.04.1
linux-image-4.4.0-154-powerpc64-smp 4.4.0-154.181~14.04.1
linux-image-aws 4.4.0.1048.49
linux-image-azure 4.15.0.1049.36
linux-image-generic-lpae-lts-xenial 4.4.0.154.135
linux-image-generic-lts-xenial 4.4.0.154.135
linux-image-lowlatency-lts-xenial 4.4.0.154.135
linux-image-powerpc-e500mc-lts-xenial 4.4.0.154.135
linux-image-powerpc-smp-lts-xenial 4.4.0.154.135
linux-image-powerpc64-emb-lts-xenial 4.4.0.154.135
linux-image-powerpc64-smp-lts-xenial 4.4.0.154.135
linux-image-virtual-lts-xenial 4.4.0.154.135

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/4041-2
https://usn.ubuntu.com/4041-1
CVE-2019-11479, https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SACKPanic

Original Source

Url : http://www.ubuntu.com/usn/USN-4041-2

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-770 Allocation of Resources Without Limits or Throttling

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 134
Application 122
Application 124
Application 117
Application 143
Application 119
Application 87
Application 111
Application 136
Application 133
Application 137
Application 122
Application 97
Application 4
Application 1
Application 1
Application 3
Application 1
Hardware 7
Hardware 6
Os 5
Os 3320
Os 1

Alert History

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0
1
Date Informations
2019-06-29 09:21:51
  • Multiple Updates
2019-06-29 09:18:43
  • First insertion