Improper Authentication in strongSwan

1) Improper Authentication

EUVDB-ID: #VU42852

Risk: Low

CVSSv3.1: 2.3 [CVSS:3.1/AV:N/AC:L/PR:/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2013-2944

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote #AU# to read and manipulate data.

strongSwan 4.3.5 through 5.0.3, when using the OpenSSL plugin for ECDSA signature verification, allows remote attackers to authenticate as other users via an invalid signature.

Mitigation

Install update from vendor's website.

Vulnerable software versions

strongSwan: 4.3.5 - 5.0.2

External links

http://download.strongswan.org/patches/10_openssl_ecdsa_signature_patch/strongswan-4.3.5-5.0.3_openssl_ecdsa_signature.patch
http://lists.opensuse.org/opensuse-updates/2013-05/msg00014.html
http://lists.opensuse.org/opensuse-updates/2013-06/msg00010.html
http://lists.opensuse.org/opensuse-updates/2013-06/msg00121.html
http://www.debian.org/security/2013/dsa-2665
http://www.securityfocus.com/bid/59580
http://www.strongswan.org/blog/2013/04/30/strongswan-5.0.4-released-(cve-2013-2944).html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.