CVE-2018-14404

Name	CVE-2018-14404
Description	A NULL pointer dereference vulnerability exists in the xpath.c:xmlXPathCompOpEval() function of libxml2 through 2.9.8 when parsing an invalid XPath expression in the XPATH_OP_AND or XPATH_OP_OR case. Applications processing untrusted XSL format inputs with the use of the libxml2 library may be vulnerable to a denial of service attack due to a crash of the application.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
References	DLA-1524-1, DLA-2369-1
NVD severity	medium
Debian Bugs	901817

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libxml2 (PTS)	stretch	2.9.4+dfsg1-2.2+deb9u2	vulnerable
	stretch (security)	2.9.4+dfsg1-2.2+deb9u5	fixed
	buster	2.9.4+dfsg1-7+deb10u2	fixed
	bullseye	2.9.10+dfsg-6.7	fixed
	bookworm, sid	2.9.12+dfsg-5	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
libxml2	source	experimental	2.9.9+dfsg1-1~exp1
libxml2	source	jessie	2.9.1+dfsg1-5+deb8u7		DLA-1524-1
libxml2	source	stretch	2.9.4+dfsg1-2.2+deb9u3		DLA-2369-1
libxml2	source	buster	2.9.4+dfsg1-7+deb10u1
libxml2	source	(unstable)	2.9.10+dfsg-2	low		901817

Notes

https://gitlab.gnome.org/GNOME/libxml2/issues/5
https://gitlab.gnome.org/GNOME/libxml2/issues/10
https://gitlab.gnome.org/GNOME/libxml2/commit/a436374994c47b12d5de1b8b1d191a098fa23594