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CVE-2016-6329

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Date: January 31, 2017

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.

Language: C

Severity Score

Related Resources (14)

https://cert-portal.siemens.com/productcert/pdf/ssa-556833.pdf
http://www-01.ibm.com/support/docview.wss?uid=swg21991482
https://community.openvpn.net/openvpn/wiki/SWEET32
http://www.securityfocus.com/bid/92631
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05369403
https://security-tracker.debian.org/tracker/CVE-2016-6329
http://www.securitytracker.com/id/1036695
http://www-01.ibm.com/support/docview.wss?uid=nas8N1021697
https://security.gentoo.org/glsa/201611-02
https://people.canonical.com/~ubuntu-security/cve/CVE-2016-6329
https://sweet32.info/
https://nvd.nist.gov/vuln/detail/CVE-2016-6329
http://www-01.ibm.com/support/docview.wss?uid=swg21995039
https://www.mend.io/vulnerability-database/CVE-2016-6329

Severity Score

Weakness Type (CWE)

Cryptographic Issues

CWE-310

Exposure of Sensitive Information to an Unauthorized Actor

CWE-200

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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