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
NameUSN-4116-1First vendor Publication2019-09-02
VendorUbuntuLast vendor Modification2019-09-02
Severity (Vendor) N/ARevisionN/A

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:S/C:N/I:N/A:C)
Cvss Base Score6.8Attack RangeNetwork
Cvss Impact Score6.9Attack ComplexityLow
Cvss Expoit Score8AuthenticationRequires single instance
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:

It was discovered that a use-after-free error existed in the block layer subsystem of the Linux kernel when certain failure conditions occurred. A local attacker could possibly use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-20856)

Amit Klein and Benny Pinkas discovered that the Linux kernel did not sufficiently randomize IP ID values generated for connectionless networking protocols. A remote attacker could use this to track particular Linux devices. (CVE-2019-10638)

Praveen Pandey discovered that the Linux kernel did not properly validate sent signals in some situations on PowerPC systems with transactional memory disabled. A local attacker could use this to cause a denial of service. (CVE-2019-13648)

It was discovered that the floppy driver in the Linux kernel did not properly validate meta data, leading to a buffer overread. A local attacker could use this to cause a denial of service (system crash). (CVE-2019-14283)

It was discovered that the floppy driver in the Linux kernel did not properly validate ioctl() calls, leading to a division-by-zero. A local attacker could use this to cause a denial of service (system crash). (CVE-2019-14284)

Jason Wang discovered that an infinite loop vulnerability existed in the virtio net driver in the Linux kernel. A local attacker in a guest VM could possibly use this to cause a denial of service in the host system. (CVE-2019-3900)

Update instructions:

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

Ubuntu 16.04 LTS:
linux-image-4.4.0-1056-kvm 4.4.0-1056.63
linux-image-4.4.0-1092-aws 4.4.0-1092.103
linux-image-4.4.0-1120-raspi2 4.4.0-1120.129
linux-image-4.4.0-1124-snapdragon 4.4.0-1124.130
linux-image-4.4.0-161-generic 4.4.0-161.189
linux-image-4.4.0-161-generic-lpae 4.4.0-161.189
linux-image-4.4.0-161-lowlatency 4.4.0-161.189
linux-image-4.4.0-161-powerpc-e500mc 4.4.0-161.189
linux-image-4.4.0-161-powerpc-smp 4.4.0-161.189
linux-image-4.4.0-161-powerpc64-emb 4.4.0-161.189
linux-image-4.4.0-161-powerpc64-smp 4.4.0-161.189
linux-image-aws 4.4.0.1092.96
linux-image-generic 4.4.0.161.169
linux-image-generic-lpae 4.4.0.161.169
linux-image-kvm 4.4.0.1056.56
linux-image-lowlatency 4.4.0.161.169
linux-image-powerpc-e500mc 4.4.0.161.169
linux-image-powerpc-smp 4.4.0.161.169
linux-image-powerpc64-emb 4.4.0.161.169
linux-image-powerpc64-smp 4.4.0.161.169
linux-image-raspi2 4.4.0.1120.120
linux-image-snapdragon 4.4.0.1124.116
linux-image-virtual 4.4.0.161.169

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/4116-1
CVE-2018-20856, CVE-2019-10638, CVE-2019-13648, CVE-2019-14283,
CVE-2019-14284, CVE-2019-3900

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.4.0-161.189
https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1092.103
https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1056.63
https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1120.129
https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1124.130

Original Source

Url : http://www.ubuntu.com/usn/USN-4116-1

CWE : Common Weakness Enumeration

%idName
14 %CWE-416Use After Free
14 %CWE-400Uncontrolled Resource Consumption ('Resource Exhaustion')
14 %CWE-399Resource Management Errors
14 %CWE-369Divide By Zero
14 %CWE-200Information Exposure
14 %CWE-190Integer Overflow or Wraparound (CWE/SANS Top 25)
14 %CWE-125Out-of-bounds Read

CPE : Common Platform Enumeration

TypeDescriptionCount
Os2
Os3303
Os2

Alert History

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0
DateInformations
2019-09-03 05:18:31
  • First insertion