CVE-2016-6329

MediumCVSS 5.9/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.0 5.9/10CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-200 CWE-310

Affected software

No affected versions have been published.

Timeline

Published: Jan 31, 2017
Last modified: Jun 17, 2026
NVD status: Modified

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