THREATPORT/VULNERABILITY/CVE-2016-6329
MEDIUM SEVERITY

CVE-2016-6329

Openvpn vulnerability

CVSS
5.9
EPSS
5.9%
EPSS pct
92th
Exploited
No known
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 vendor
Openvpn
Affected product
Openvpn
CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness type (CWE)
Published
2017-01-31

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, high attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality.

Its EPSS score of 5.9% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 92% of all scored CVEs.

Check your external exposure to CVE-2016-6329

  • Confirm whether Openvpn Openvpn is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2016-6329.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2016-6329

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2016-6329 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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Are you exposed to CVE-2016-6329?

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