| Name | CVE-2016-2774 |
| Description | ISC DHCP 4.1.x before 4.1-ESV-R13 and 4.2.x and 4.3.x before 4.3.4 does not restrict the number of concurrent TCP sessions, which allows remote attackers to cause a denial of service (INSIST assertion failure or request-processing outage) by establishing many sessions. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-2003-1, ELA-192-1 |
| Debian Bugs | 817158 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| isc-dhcp (PTS) | jessie, jessie (lts) | 4.3.1-6+deb8u6 | fixed |
| stretch (security) | 4.3.5-3+deb9u2 | fixed |
| stretch (lts), stretch | 4.3.5-3+deb9u3 | fixed |
| buster (security), buster, buster (lts) | 4.4.1-2+deb10u3 | fixed |
| bullseye | 4.4.1-2.3+deb11u2 | fixed |
| bullseye (security) | 4.4.1-2.3+deb11u1 | fixed |
| bookworm | 4.4.3-P1-2 | fixed |
| sid, trixie | 4.4.3-P1-5 | fixed |
The information below is based on the following data on fixed versions.
Notes
[wheezy] - isc-dhcp <no-dsa> (Minor issue)
https://kb.isc.org/article/AA-01354
https://gitlab.isc.org/isc-projects/dhcp/-/commit/0b209ea5cc333255e055113fa2ad636dda681a21