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Ubuntu 21.04: 4969-1 Critical isc-dhcp Denial of Service

ubuntu
Calendar Grey May 27, 2021
Dist Ubuntu Esm H88
Patch released addressing isc-dhcp security flaw in Ubuntu, enhancing service reliability.
DHCP could be made to crash if it received specially crafted network traffic.

Summary

Topics%20covered

Topics Covered

security advisory denial of service critical ubuntu isc-dhcp

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 21.04: isc-dhcp-client 4.4.1-2.2ubuntu6.1 isc-dhcp-server 4.4.1-2.2ubuntu6.1 Ubuntu 20.10: isc-dhcp-client 4.4.1-2.1ubuntu10.1 isc-dhcp-server 4.4.1-2.1ubuntu10.1 Ubuntu 20.04 LTS: isc-dhcp-client 4.4.1-2.1ubuntu5.20.04.2 isc-dhcp-server 4.4.1-2.1ubuntu5.20.04.2 Ubuntu 18.04 LTS: isc-dhcp-client 4.3.5-3ubuntu7.3 isc-dhcp-server 4.3.5-3ubuntu7.3 In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-4969-1

CVE-2021-25217

Severity
critical
Lowest
Low
Medium
High
Critical

May 27, 2021

Topics%20covered

Topics Covered

security advisory denial of service critical ubuntu isc-dhcp

Package Information

https://launchpad.net/ubuntu/+source/isc-dhcp/4.4.1-2.2ubuntu6.1 https://launchpad.net/ubuntu/+source/isc-dhcp/4.4.1-2.1ubuntu10.1 https://launchpad.net/ubuntu/+source/isc-dhcp/4.4.1-2.1ubuntu5.20.04.2 https://launchpad.net/ubuntu/+source/isc-dhcp/4.3.5-3ubuntu7.3

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