CVE-2018-5732

Name	CVE-2018-5732
Description	Failure to properly bounds-check a buffer used for processing DHCP options allows a malicious server (or an entity masquerading as a server) to cause a buffer overflow (and resulting crash) in dhclient by sending a response containing a specially constructed options section. Affects ISC DHCP versions 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-1313-1, DSA-4133-1
Debian Bugs	891786

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
isc-dhcp (PTS)	bookworm	4.4.3-P1-2	fixed
	trixie	4.4.3-P1-8	fixed

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

Package	Type	Release	Fixed Version	Origin	Debian Bugs
isc-dhcp	source	wheezy	4.2.2.dfsg.1-5+deb70u9	DLA-1313-1
isc-dhcp	source	jessie	4.3.1-6+deb8u3	DSA-4133-1
isc-dhcp	source	stretch	4.3.5-3+deb9u1	DSA-4133-1
isc-dhcp	source	(unstable)	4.3.5-3.1		891786

Notes

https://kb.isc.org/article/AA-01565/75/CVE-2018-5732
https://bugs.isc.org/Public/Bug/Display.html?id=47139
https://gitlab.isc.org/isc-projects/dhcp/-/commit/c5931725b48b121d232df4ba9e45bc41e0ba114d (4.4.1)
Fixes for 4.3.6p1: https://gitlab.isc.org/isc-projects/dhcp/-/commit/99a25aedea02d9c259cb8fabf4be700fb32571a3