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-4135-2 First vendor Publication 2019-09-18
Vendor Ubuntu Last vendor Modification 2019-09-18
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:L/AC:L/Au:N/C:C/I:C/A:C)
Cvss Base Score 7.2 Attack Range Local
Cvss Impact Score 10 Attack Complexity Low
Cvss Expoit Score 3.9 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 - Ubuntu 12.04 ESM

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-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty - linux-lts-trusty: Linux hardware enablement kernel from Trusty for Precise ESM

Details:

Peter Pi discovered a buffer overflow in the virtio network backend (vhost_net) implementation in the Linux kernel. An attacker in a guest may be able to use this to cause a denial of service (host OS crash) or possibly execute arbitrary code in the host OS. (CVE-2019-14835)

It was discovered that the Linux kernel on PowerPC architectures did not properly handle Facility Unavailable exceptions in some situations. A local attacker could use this to expose sensitive information. (CVE-2019-15030)

It was discovered that the Linux kernel on PowerPC architectures did not properly handle exceptions on interrupts in some situations. A local attacker could use this to expose sensitive information. (CVE-2019-15031)

Update instructions:

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

Ubuntu 14.04 ESM:
linux-image-3.13.0-173-generic 3.13.0-173.224
linux-image-3.13.0-173-generic-lpae 3.13.0-173.224
linux-image-3.13.0-173-lowlatency 3.13.0-173.224
linux-image-3.13.0-173-powerpc-e500 3.13.0-173.224
linux-image-3.13.0-173-powerpc-e500mc 3.13.0-173.224
linux-image-3.13.0-173-powerpc-smp 3.13.0-173.224
linux-image-3.13.0-173-powerpc64-emb 3.13.0-173.224
linux-image-3.13.0-173-powerpc64-smp 3.13.0-173.224
linux-image-4.15.0-1059-azure 4.15.0-1059.64~14.04.1
linux-image-4.4.0-1054-aws 4.4.0-1054.58
linux-image-4.4.0-164-generic 4.4.0-164.192~14.04.1
linux-image-4.4.0-164-generic-lpae 4.4.0-164.192~14.04.1
linux-image-4.4.0-164-lowlatency 4.4.0-164.192~14.04.1
linux-image-4.4.0-164-powerpc-e500mc 4.4.0-164.192~14.04.1
linux-image-4.4.0-164-powerpc-smp 4.4.0-164.192~14.04.1
linux-image-4.4.0-164-powerpc64-emb 4.4.0-164.192~14.04.1
linux-image-4.4.0-164-powerpc64-smp 4.4.0-164.192~14.04.1
linux-image-aws 4.4.0.1054.55
linux-image-azure 4.15.0.1059.45
linux-image-generic 3.13.0.173.184
linux-image-generic-lpae 3.13.0.173.184
linux-image-generic-lpae-lts-xenial 4.4.0.164.143
linux-image-generic-lts-xenial 4.4.0.164.143
linux-image-lowlatency 3.13.0.173.184
linux-image-lowlatency-lts-xenial 4.4.0.164.143
linux-image-powerpc-e500 3.13.0.173.184
linux-image-powerpc-e500mc 3.13.0.173.184
linux-image-powerpc-e500mc-lts-xenial 4.4.0.164.143
linux-image-powerpc-smp 3.13.0.173.184
linux-image-powerpc-smp-lts-xenial 4.4.0.164.143
linux-image-powerpc64-emb 3.13.0.173.184
linux-image-powerpc64-emb-lts-xenial 4.4.0.164.143
linux-image-powerpc64-smp 3.13.0.173.184
linux-image-powerpc64-smp-lts-xenial 4.4.0.164.143
linux-image-server 3.13.0.173.184
linux-image-virtual 3.13.0.173.184
linux-image-virtual-lts-xenial 4.4.0.164.143

Ubuntu 12.04 ESM:
linux-image-3.13.0-173-generic 3.13.0-173.224~12.04.1
linux-image-3.13.0-173-generic-lpae 3.13.0-173.224~12.04.1
linux-image-3.13.0-173-lowlatency 3.13.0-173.224~12.04.1
linux-image-3.2.0-143-generic 3.2.0-143.190
linux-image-3.2.0-143-generic-pae 3.2.0-143.190
linux-image-3.2.0-143-highbank 3.2.0-143.190
linux-image-3.2.0-143-omap 3.2.0-143.190
linux-image-3.2.0-143-powerpc-smp 3.2.0-143.190
linux-image-3.2.0-143-powerpc64-smp 3.2.0-143.190
linux-image-3.2.0-143-virtual 3.2.0-143.190
linux-image-generic 3.2.0.143.158
linux-image-generic-lpae-lts-trusty 3.13.0.173.161
linux-image-generic-lts-trusty 3.13.0.173.161
linux-image-generic-pae 3.2.0.143.158
linux-image-highbank 3.2.0.143.158
linux-image-omap 3.2.0.143.158
linux-image-powerpc 3.2.0.143.158
linux-image-powerpc-smp 3.2.0.143.158
linux-image-powerpc64-smp 3.2.0.143.158
linux-image-server 3.2.0.143.158
linux-image-virtual 3.2.0.143.158

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/4135-2
https://usn.ubuntu.com/4135-1
CVE-2019-14835, CVE-2019-15030, CVE-2019-15031

Original Source

Url : http://www.ubuntu.com/usn/USN-4135-2

CWE : Common Weakness Enumeration

% Id Name
50 % CWE-662 Insufficient Synchronization
50 % CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') (CWE/SANS Top 25)

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 2
Application 2
Application 5
Application 1
Application 1
Application 1
Application 1
Application 1
Application 1
Os 7
Os 3
Os 2
Os 3331
Os 2
Os 2
Os 2
Os 3
Os 2
Os 3
Os 7
Os 5
Os 2

Alert History

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0
1
Date Informations
2019-09-19 00:22:08
  • Multiple Updates
2019-09-18 17:18:53
  • First insertion