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Ubuntu 14.04: Dnsmasq Important Denial of Service USN-7689-1 CVE-2019-14834

ubuntu
Calendar Grey August 11, 2025
Dist Ubuntu Esm H88
Dnsmasq running on Ubuntu 14.04 LTS is susceptible to a denial of service flaw. It is advised to apply updates for secure operation.
Dnsmasq could be made to crash if it received specially crafted network traffic.

Summary

Dnsmasq could be made to crash if it received specially crafted network

traffic.

Software Description:

- dnsmasq: Small caching DNS proxy and DHCP/TFTP server

Details:

Xu Mingjie discovered that Dnsmasq did not correctly handle certain memory

operations. A remote attacker could possibly use this issue to cause a

denial of service.

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu important dnsmasq network crash

Update Instructions

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

Ubuntu 14.04 LTS
  dnsmasq                         2.68-1ubuntu0.2+esm3
                                  Available with Ubuntu Pro
  dnsmasq-base                    2.68-1ubuntu0.2+esm3
                                  Available with Ubuntu Pro
  dnsmasq-utils                   2.68-1ubuntu0.2+esm3
                                  Available with Ubuntu Pro

After a standard system update you need to restart dnsmasq to make
all the necessary changes.

References

https://ubuntu.com/security/notices/USN-7689-1

CVE-2019-14834

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7689-1

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu important dnsmasq network crash

Package Information

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