Vulnerabilities

CVSS

5.9 Medium

Vector

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

Risk score

47.2

Published

2017-01-31

Status

Modified

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.

Weaknesses

CWE-200CWE-310

Coverage 1

threat-intel

Study of 281 Free Android VPN Apps Finds Traffic Leaks, Unencrypted Data, and Tracking

A University of Michigan, New Mexico, and IIT Delhi study found that 281 popular free Android VPN apps on the Google Play Store have significant security flaws, including leaking user traffic, sending data in plain text,…

The Hacker News · Jul 10, 2026 High

CVE-2016-6329CVE-2016-2183vpnandroidsecurity

All articles mentioning it

Advisories and references

• www-01.ibm.com/support/docview.wss?uid=nas8N1021697
• www-01.ibm.com/support/docview.wss?uid=swg21991482
• www-01.ibm.com/support/docview.wss?uid=swg21995039
• securityfocus.com/bid/92631
• securitytracker.com/id/1036695
• cert-portal.siemens.com/productcert/pdf/ssa-556833.pdf
• community.openvpn.net/openvpn/wiki/SWEET32
• h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_...
• security.gentoo.org/glsa/201611-02
• sweet32.info/