Information disclosure in Openvpn
CVE-2016-6329
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.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.059 (93.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 93.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.059 · newest: 0.059 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- sweet32.info/ (Technical Description, Third Party Advisory)
- h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay (Third Party Advisory)
- www.securitytracker.com/id/1036695 (VDB Entry, Third Party Advisory, vdb-entry)
- www-01.ibm.com/support/docview.wss (Third Party Advisory)
- www-01.ibm.com/support/docview.wss (Third Party Advisory)
- security.gentoo.org/glsa/201611-02 (vendor-advisory, Third Party Advisory)
- community.openvpn.net/openvpn/wiki/SWEET32 (Vendor Advisory)
- www-01.ibm.com/support/docview.wss (Permissions Required, Third Party Advisory)
- www.securityfocus.com/bid/92631 (VDB Entry, Third Party Advisory, vdb-entry)
- cert-portal.siemens.com/productcert/pdf/ssa-556833.pdf
Frequently asked questions
- What is CVE-2016-6329?
- CVE-2016-6329 is a medium-severity vulnerability in Openvpn, classified under Information Disclosure. CVSS score: 5.9/10. Published 2017-01-31.
- How severe is CVE-2016-6329?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2016-6329 known to be exploited?
- 27 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.