Vulnerability Report

CVE-2016-6329

Title: Openvpn Information Disclosure

Information Disclosure

Proof Of Concept

No public PoC currently indexed for CVE-2016-6329.

CWE Category CWE-200

Published Date Jan 31, 2017

Modified Date Jun 17, 2026

Exploit Status Not Found

Score 5.9 CVSS v3.0

Exploit Probability (EPSS)

5.94%

Vulnerability Summary

CVE-2016-6329: OpenVPN, when using a 64-bit block cipher, makes it easier for remote attackers to obtain cleartext data via a birthday attack against a long-duration encrypted session, as demonstrated by an HTTP-over-OpenVPN session using Blowfish in CBC mode, aka a "Sweet32" attack.

Impacted Vendors

openvpn 1

aviatrix 1

Reference Links

http://www-01.ibm.com/support/docview.wss?uid=nas8N1021697 http://www-01.ibm.com/support/docview.wss?uid=swg21991482 http://www-01.ibm.com/support/docview.wss?uid=swg21995039 http://www.securityfocus.com/bid/92631 http://www.securitytracker.com/id/1036695 https://cert-portal.siemens.com/productcert/pdf/ssa-556833.pdf https://community.openvpn.net/openvpn/wiki/SWEET32 https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05369403 https://security.gentoo.org/glsa/201611-02 https://sweet32.info/ http://www-01.ibm.com/support/docview.wss?uid=nas8N1021697 http://www-01.ibm.com/support/docview.wss?uid=swg21991482 http://www-01.ibm.com/support/docview.wss?uid=swg21995039 http://www.securityfocus.com/bid/92631 http://www.securitytracker.com/id/1036695 https://cert-portal.siemens.com/productcert/pdf/ssa-556833.pdf https://community.openvpn.net/openvpn/wiki/SWEET32 https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05369403 https://security.gentoo.org/glsa/201611-02 https://sweet32.info/

CVSS v3.0

Source Entity [email protected]

Severity MEDIUM

5.9

Attack Vector

NETWORK

Complexity

HIGH

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v2.0

Source Entity [email protected]

Severity MEDIUM

4.3

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:N/AC:M/Au:N/C:P/I:N/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns