Vulnerability CVE-2015-4171
Published: 2015-06-10

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.

CVSS2 => (AV:N/AC:H/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
2.6/10
2.9/10
4.9/10
Exploit range
Attack complexity
Authentication
Remote
High
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
Strongswan -> Strongswan 
Strongswan -> Strongswan vpn client 
Debian -> Debian linux 
Canonical -> Ubuntu linux 

 References:
http://lists.opensuse.org/opensuse-updates/2015-06/msg00040.html
http://www.debian.org/security/2015/dsa-3282
http://www.openwall.com/lists/oss-security/2015/05/29/6
http://www.openwall.com/lists/oss-security/2015/05/29/7
http://www.openwall.com/lists/oss-security/2015/06/08/4
http://www.securityfocus.com/bid/74933
http://www.securitytracker.com/id/1032514
http://www.ubuntu.com/usn/USN-2628-1
https://bugzilla.suse.com/show_bug.cgi?id=933591
https://play.google.com/store/apps/details?id=org.strongswan.android
https://www.strongswan.org/blog/2015/06/08/strongswan-vulnerability-%2528cve-2015-4171%2529.html
https://www.suse.com/security/cve/CVE-2015-4171.html
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