Larissa Shapiro

**Name of the Vulnerable Software and Affected Versions** ISC DHCP versions 4.0.x through 4.1.x before 4.1.2-P1 ISC DHCP 4.0-ESV and 4.1-ESV before 4.1-ESV-R1 ISC DHCP versions 4.2.x before 4.2.1b1 **Description** The issue allows remote attackers to cause a denial of service by sending a message over IPv6 for a declined and abandoned address, resulting in an assertion failure and daemon crash. **Recommendations** For ISC DHCP versions 4.0.x through 4.1.x before 4.1.2-P1, update to version 4.1.2-P1 or later. For ISC DHCP 4.0-ESV and 4.1-ESV before 4.1-ESV-R1, update to version 4.1-ESV-R1 or later. For ISC DHCP versions 4.2.x before 4.2.1b1, update to version 4.2.1b1 or later.