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CVE-2019-6473
A packet containing a malformed DUID can cause the kea-dhcp6 server to terminate
Medium6.5EPSS 1.2%
- Published
- Updated
- Reserved
- Assigned by
- isc
Description
An invalid hostname option can trigger an assertion failure in the Kea DHCPv4 server process (kea-dhcp4), causing the server process to exit. Versions affected: 1.4.0 to 1.5.0, 1.6.0-beta1, and 1.6.0-beta2.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| iscCNA (assigner) | 3.1 | Medium6.5 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium6.5 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 1.2% · top 33% of all CVEs (4 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Weakness
- An attacker who is able to deliberately exploit this vulnerability can cause the kea-dhcp4 server to stop executing, resulting in denial of service to clients. Only the DHCPv4 service is affected by this vulnerability.
- CWE-617 (opens in a new tab)All about CWE-617 and its CVEs
Affected products
What to do
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
References (1)
- https://kb.isc.org/docs/cve-2019-6473 (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2019-6473)Record last updated .