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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.
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|Attack Vector (AV):||NETWORK|
|Attack Complexity (AC):||HIGH|
|Privileges Required (PR):||NONE|
|User Interaction (UI):||NONE|
|Access Vector (AV):||NETWORK|
|Access Complexity (AC):||MEDIUM|