Descriptiondhcpd in ISC DHCP 4.x before 4.2.3-P1 and 4.1-ESV before 4.1-ESV-R4 does not properly handle regular expressions in dhcpd.conf, which allows remote attackers to cause a denial of service (daemon crash) via a crafted request packet.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDSA-2519-1, DSA-2519-2
NVD severitymedium (attack range: remote)
Debian Bugs652259

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
isc-dhcp (PTS)jessie (security), jessie4.3.1-6+deb8u3fixed
stretch (security), stretch4.3.5-3+deb9u1fixed
buster, sid4.3.5-4fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
dhcp3source(unstable)(not affected)


- dhcp3 <not-affected> (Only affects DHCP 4.x)

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