CVE-2018-11406

Name	CVE-2018-11406
Description	An issue was discovered in the Security component in Symfony 2.7.x before 2.7.48, 2.8.x before 2.8.41, 3.3.x before 3.3.17, 3.4.x before 3.4.11, and 4.0.x before 4.0.11. By default, a user's session is invalidated when the user is logged out. This behavior can be disabled through the invalidate_session option. In this case, CSRF tokens were not erased during logout which allowed for CSRF token fixation.
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	DSA-4262-1
NVD severity	medium (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
symfony (PTS)	jessie (security), jessie	2.3.21+dfsg-4+deb8u3	fixed
	stretch (security), stretch	2.8.7+dfsg-1.3+deb9u1	fixed
	buster	3.4.19+dfsg-1	fixed
	sid	3.4.20+dfsg-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin
symfony	source	(unstable)	3.4.12+dfsg-1	medium
symfony	source	jessie	(not affected)
symfony	source	stretch	2.8.7+dfsg-1.3+deb9u1	medium	DSA-4262-1

[jessie] - symfony <not-affected> (vulnerable code not present in branch 2.3)
https://symfony.com/blog/cve-2018-11406-csrf-token-fixation