CVE-2015-4171

Name	CVE-2015-4171
Description	strongSwan 4.3.0 through 5.x before 5.3.2 and strongSwan VPN Client before 1.4.6, when using EAP or pre-shared keys for authenticating an IKEv2 connection, does not enforce server authentication restrictions until the entire authentication process is complete, which allows remote servers to obtain credentials by using a valid certificate and then reading the responses.
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-244-1, DSA-3282-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
strongswan (PTS)	bullseye (security), bullseye	5.9.1-1+deb11u4	fixed
	bookworm, bookworm (security)	5.9.8-5+deb12u1	fixed
	sid, trixie	5.9.13-2	fixed

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

Package	Type	Release	Fixed Version	Origin
strongswan	source	squeeze	4.4.1-5.7	DLA-244-1
strongswan	source	wheezy	4.5.2-1.5+deb7u7	DSA-3282-1
strongswan	source	jessie	5.2.1-6+deb8u1	DSA-3282-1
strongswan	source	(unstable)	5.3.1-1

https://www.strongswan.org/blog/2015/06/08/strongswan-vulnerability-(cve-2015-4171).html