SB2025092392 - Ubuntu update for isc-kea
Published: September 23, 2025
Security Bulletin ID
SB2025092392
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Reachable Assertion (CVE-ID: CVE-2019-6473)
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
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.
Remediation
Install update from vendor's website.