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Ubuntu 18.04 LTS: USN-4118-1 Critical Denial of Service Issues

ubuntu
Calendar Grey September 2, 2019
Dist Ubuntu Esm H88
Urgent patches for Ubuntu's Linux kernel address several denial of service vulnerabilities. Apply updates immediately!
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-aws: Linux kernel for Amazon Web Services (AWS) systems

- linux-aws-hwe: Linux kernel for Amazon Web Services (AWS-HWE) systems

Details:

It was discovered that the alarmtimer implementation in the Linux kernel

contained an integer overflow vulnerability. A local attacker could use

this to cause a denial of service. (CVE-2018-13053)

Wen Xu discovered that the XFS filesystem implementation in the Linux

kernel did not properly track inode validations. An attacker could use this

to construct a malicious XFS image that, when mounted, could cause a denial

of service (system crash). (CVE-2018-13093)

Wen Xu discovered that the f2fs file system implementation in the Linux

kernel did not properly validate metadata. An attacker could use this to

construct a malicious f2fs image that, when mounted, could cause a denial

of service (system crash). (CVE-2018-13096, CVE-2018-13097, CVE-2018-13098,

CVE-2018-1...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service kernel update ubuntu system crash linux kernel AWS

Update Instructions

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

Ubuntu 18.04 LTS:
  linux-image-4.15.0-1047-aws     4.15.0-1047.49
  linux-image-aws                 4.15.0.1047.46

Ubuntu 16.04 LTS:
  linux-image-4.15.0-1047-aws     4.15.0-1047.49~16.04.1
  linux-image-aws-hwe             4.15.0.1047.47

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://ubuntu.com/security/notices/USN-4118-1

CVE-2018-13053, CVE-2018-13093, CVE-2018-13096, CVE-2018-13097,

CVE-2018-13098, CVE-2018-13099, CVE-2018-13100, CVE-2018-14609,

CVE-2018-14610, CVE-2018-14611, CVE-2018-14612, CVE-2018-14613,

CVE-2018-14614, CVE-2018-14615, CVE-2018-14616, CVE-2018-14617,

CVE-2018-16862, CVE-2018-19985, CVE-2018-20169, CVE-2018-20511,

CVE-2018-20784, CVE-2018-20856, CVE-2018-5383, CVE-2019-0136,

CVE-2019-10126, CVE-2019-10207, CVE-2019-10638, CVE-2019-10639,

CVE-2019-11085, CVE-2019-11487, CVE-2019-11599, CVE-2019-11810,

CVE-2019-11815, CVE-2019-11833, CVE-2019-11884, CVE-2019-12818,

CVE-2019-12819, CVE-2019-12984, CVE-2019-13233, CVE-2019-13272,

CVE-2019-13631, CVE-2019-14283, CVE-2019-14284, CVE-2019-14763,

CVE-2019-15090, CVE-2019-15211, CVE-2019-15212, CVE-2019-15214,

CVE-2019-15215, CVE-2019-15216, CVE-2019-15218, CVE-2019-15220,

CVE-2019-15221, CVE-2019-15292, CVE-2019-2024, CVE-2019-2101,

CVE-2019-3701, CVE-2019-3819, CVE-2019-3846, CVE-2019-3900,

CVE-2019-9506

Severity
critical
Lowest
Low
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Critical

September 02, 2019

Topics%20covered

Topics Covered

security advisory denial of service kernel update ubuntu system crash linux kernel AWS

Package Information

https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1047.49
https://launchpad.net/ubuntu/+source/linux-aws-hwe/4.15.0-1047.49~16.04.1

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