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Ubuntu 14.04 ESM USN-5130-1 Critical: Kernel Denial of Service Issue

ubuntu
Calendar Grey November 8, 2021
Dist Ubuntu Esm H88
Debian Security Alert DSA-5130-1 highlights critical vulnerabilities in the kernel that may allow unauthorized access. Ensure your system is protected!
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

Details:

Jann Horn discovered a race condition in the tty subsystem of the Linux

kernel in the locking for the TIOCSPGRP ioctl(), leading to a use-after-

free vulnerability. A local attacker could use this to cause a denial of

service (system crash) or possibly execute arbitrary code. (CVE-2020-29661)

Jann Horn discovered that the tty subsystem of the Linux kernel did not use

consistent locking in some situations, leading to a read-after-free

vulnerability. A local attacker could use this to cause a denial of service

(system crash) or possibly expose sensitive information (kernel memory).

(CVE-2020-29660)

Topics%20covered

Topics Covered

security advisory denial of service critical exploit Ubuntu kernel

Update Instructions

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

Ubuntu 14.04 ESM:
  linux-image-3.13.0-188-generic  3.13.0-188.239
  linux-image-3.13.0-188-lowlatency  3.13.0-188.239
  linux-image-generic             3.13.0.188.197
  linux-image-lowlatency          3.13.0.188.197
  linux-image-server              3.13.0.188.197
  linux-image-virtual             3.13.0.188.197

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-5130-1

CVE-2020-29660, CVE-2020-29661

Severity
critical
Lowest
Low
Medium
High
Critical

November 09, 2021

Topics%20covered

Topics Covered

security advisory denial of service critical exploit Ubuntu kernel

Package Information

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