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Ubuntu 18.10: USN-3891-1 Critical: systemd DoS Through D-Bus Message

ubuntu
Calendar Grey February 18, 2019
Dist Ubuntu Esm H88
Ubuntu Security Notice USN-3892-1 outlines a flaw in the kernel that enables local Denial of Service (DoS) attacks through crafted network packets.
systemd could be made to crash if it received specially a crafted D-Bus message.

Summary

systemd could be made to crash if it received specially a crafted

D-Bus message.

Software Description:

- systemd: system and service manager

Details:

It was discovered that systemd incorrectly handled certain D-Bus messages.

A local unprivileged attacker could exploit this in order to crash the

init process, resulting in a system denial-of-service (kernel panic).

Topics%20covered

Topics Covered

security advisory DoS Ubuntu local attack system crash systemd D-Bus message

Update Instructions

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

Ubuntu 18.10:
  libsystemd0                     239-7ubuntu10.8
  systemd                         239-7ubuntu10.8

Ubuntu 18.04 LTS:
  libsystemd0                     237-3ubuntu10.13
  systemd                         237-3ubuntu10.13

Ubuntu 16.04 LTS:
  libsystemd0                     229-4ubuntu21.16
  systemd                         229-4ubuntu21.16

After a standard system update you need to reboot your computer to make
all the necessary changes.

References

CVE-2019-6454

Severity
critical
Lowest
Low
Medium
High
Critical

February 18, 2019

Topics%20covered

Topics Covered

security advisory DoS Ubuntu local attack system crash systemd D-Bus message

Package Information

https://launchpad.net/ubuntu/+source/systemd/239-7ubuntu10.8
https://launchpad.net/ubuntu/+source/systemd/237-3ubuntu10.13
https://launchpad.net/ubuntu/+source/systemd/229-4ubuntu21.16

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