CVE-2016-6329: Infoleak
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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2016-6329?
CVE-2016-6329 is considered a medium severity vulnerability due to its potential to expose cleartext data through a birthday attack.
How do I fix CVE-2016-6329?
To fix CVE-2016-6329, upgrade OpenVPN to a version later than 2.3.14 and avoid using 64-bit block ciphers like Blowfish in CBC mode.
What type of attack does CVE-2016-6329 allow?
CVE-2016-6329 allows remote attackers to perform a birthday attack against long-duration encrypted sessions.
In which encryption mode is CVE-2016-6329 particularly vulnerable?
CVE-2016-6329 is particularly vulnerable when using Blowfish in CBC mode.
Which versions of OpenVPN are affected by CVE-2016-6329?
CVE-2016-6329 affects OpenVPN versions up to and including 2.3.14.