CVE-2009-1957

Name	CVE-2009-1957
Description	charon/sa/ike_sa.c in the charon daemon in strongSWAN before 4.3.1 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via an invalid IKE_SA_INIT request that triggers "an incomplete state," followed by a CREATE_CHILD_SA request.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
References	DSA-1899-1
NVD severity	medium (attack range: remote)
Debian Bugs	531612

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
strongswan (PTS)	wheezy	4.5.2-1.5+deb7u8	fixed
	wheezy (security)	4.5.2-1.5+deb7u10	fixed
	jessie (security), jessie	5.2.1-6+deb8u4	fixed
	stretch	5.5.1-4	fixed
	buster, sid	5.5.3-2	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
strongswan	source	(unstable)	4.2.14-1.1	medium		531612
strongswan	source	etch	2.8.0+dfsg-1+etch2	medium	DSA-1899-1
strongswan	source	lenny	4.2.4-5+lenny3	medium	DSA-1899-1

[etch] - strongswan <not-affected> (Vulnerable code not present, IKEv2 was introduced in 4.3)