Description
ISC DHCP 4.x before 4.1-ESV-R12-P1, 4.2.x, and 4.3.x before 4.3.3-P1 allows remote attackers to cause a denial of service (application crash) via an invalid length field in a UDP IPv4 packet.
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 | 4.3.3-7 | — |
| Debian 12 | isc-dhcp | 4.3.3-7 | — |
| Debian 8 | isc-dhcp | 4.3.1-6+deb8u2 | DSA-3442-1 |
| Debian 7 | isc-dhcp | 4.2.2.dfsg.1-5+deb70u8 | DSA-3442-1 |
| Debian 6.0 | isc-dhcp | 4.1.1-P1-15+squeeze9 | DLA-385-2, DLA-385-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | isc-dhcp | 4.2.4-7ubuntu12.4 | USN-2868-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | dhcp | 4.3.3-4.1 | SUSE-SU-2016:0541-1 |
| SLES 12 | dhcp | 4.2.6-14.3.1 | SUSE-SU-2016:0540-1 |
| SLES 11 SP4 | dhcp | 4.2.4.P2-0.24.1 | SUSE-SU-2016:0481-1 |
| SLES 11 SP3 | dhcp | 4.2.4.P2-0.24.1 | SUSE-SU-2016:0481-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | dhcp | 4.3.3-4.1 | SUSE-SU-2016:0541-1 |
| SLES for SAP 12 | dhcp | 4.2.6-14.3.1 | SUSE-SU-2016:0540-1 |
| SLES for SAP 11 SP4 | dhcp | 4.2.4.P2-0.24.1 | SUSE-SU-2016:0481-1 |
| SLES for SAP 11 SP3 | dhcp | 4.2.4.P2-0.24.1 | SUSE-SU-2016:0481-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | dhcp | 4.3.3.P1-3.1 | openSUSE-SU-2024:10358-1 |
Advisories 8
- USN-2868-1 isc-dhcp vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-385-2 isc-dhcp - regression update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-385-1 isc-dhcp - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3442-1 isc-dhcp - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2016:0481-1 Security update for dhcp SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0540-1 Security update for dhcp SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10358-1 dhcp-4.3.3.P1-3.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- SUSE-SU-2016:0541-1 Security update for dhcp SUSE / openSUSE Security Updates · May 2, 2025
References
- 1034657 vdb-entry
- openSUSE-SU-2016:0610 vendor-advisory
- https://blogs.sophos.com/2016/02/17/utm-up2date-9-354-released/
- https://kb.isc.org/article/AA-01334
- https://blogs.sophos.com/2016/02/29/utm-up2date-9-319-released/
- FEDORA-2016-0c5bb21bf1 vendor-advisory
- DSA-3442 vendor-advisory
- USN-2868-1 vendor-advisory
- FEDORA-2016-adb533a418 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html
- 80703 vdb-entry
- openSUSE-SU-2016:0601 vendor-advisory