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.
CVSS Details
- CVSS 3.0 Base Score: 5.9
- CVSS 3.0 Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux | — | Upgrade openvpn | Jul 1, 2017 | Sep 27, 2016 |
| Debian | — | No solution exists | May 15, 2025 | May 15, 2025 |
| Gentoo Linux | — | Upgrade net-misc/openvpn. | Oct 30, 2017 | Jan 31, 2017 |
| Suse | — | Upgrade openvpn-auth-pam-pluginUpgrade openvpn | Jun 20, 2017 | Jan 31, 2017 |
| Ubuntu | — | Upgrade openvpn | Jun 23, 2017 | Jan 31, 2017 |
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