CVE-2019-6474

A packet containing a malformed DUID can cause the kea-dhcp6 server to terminate

Description

A missing check on incoming client requests can be exploited to cause a situation where the Kea server's lease storage contains leases which are rejected as invalid when the server tries to load leases from storage on restart. If the number of such leases exceeds a hard-coded limit in the Kea code, a server trying to restart will conclude that there is a problem with its lease store and give up. Versions affected: 1.4.0 to 1.5.0, 1.6.0-beta1, and 1.6.0-beta2

Remediation

Solution:

  • Upgrade to a version of Kea containing a fix, available via https://www.isc.org/downloads. - Kea 1.4.0-P2 - Kea 1.5.0-P1 - Kea 1.6.0

Category

5.7
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.59% Top 20%
Vendor Advisory isc.org
Affected: ISC Kea
Published at:
Updated at:

References

Link Tags
https://kb.isc.org/docs/cve-2019-6474 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2019-6474?
CVE-2019-6474 has been scored as a medium severity vulnerability.
How to fix CVE-2019-6474?
To fix CVE-2019-6474: Upgrade to a version of Kea containing a fix, available via https://www.isc.org/downloads. - Kea 1.4.0-P2 - Kea 1.5.0-P1 - Kea 1.6.0
Is CVE-2019-6474 being actively exploited in the wild?
It is possible that CVE-2019-6474 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2019-6474?
CVE-2019-6474 affects ISC Kea.
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