Description
The DHCPv6 server in ISC DHCP 4.0.x and 4.1.x before 4.1.2-P1, 4.0-ESV and 4.1-ESV before 4.1-ESV-R1, and 4.2.x before 4.2.1b1 allows remote attackers to cause a denial of service (assertion failure and daemon crash) by sending a message over IPv6 for a declined and abandoned address.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 13 | isc-dhcp | 4.1.1-P1-16 | — |
| Debian 12 | isc-dhcp | 4.1.1-P1-16 | — |
| Debian 6.0 | isc-dhcp | 4.1.1-P1-15+squeeze1 | DSA-2184-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | dhcp +2 | 12:4.1.1-12.P1.el6_0.2 | RHSA-2011:0256 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | dhcp | 4.3.3.P1-3.1 | openSUSE-SU-2024:10358-1 |
Advisories 3
- RHSA-2011:0256 Red Hat Security Advisory: dhcp security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-2184-1 isc-dhcp - denial of service Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10358-1 dhcp-4.3.3.P1-3.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
References
- ADV-2011-0266 vdb-entry
- 43006 third-party-advisory
- ADV-2011-0235 vdb-entry
- 43354 third-party-advisory
- dhcp-dhcpv6-dos(64959) vdb-entry
- 70680 vdb-entry
- 43104 third-party-advisory
- https://kb.isc.org/article/AA-00456
- MDVSA-2011:022 vendor-advisory
- ADV-2011-0583 vdb-entry
- ADV-2011-0300 vdb-entry
- 43613 third-party-advisory
- 1024999 vdb-entry
- 43167 third-party-advisory
- RHSA-2011:0256 vendor-advisory
- 46035 vdb-entry
- FEDORA-2011-0862 vendor-advisory
- http://www.isc.org/software/dhcp/advisories/cve-2011-0413
- ADV-2011-0400 vdb-entry
- DSA-2184 vendor-advisory
- VU#686084 third-party-advisory