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CVE details

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.

Score
5.9 medium
Published
2017-01-31
Links
NVD · cve.org

Affected ports (1)

PortPackageVersionStatusMaintainer
security/openvpn-developenvpn-develg20260907,2unaddressedgert@greenie.muc.de

Template for a VuXML entry

Range taken from the CVE record, check it before committing. make newentry in security/vuxml creates the vid.

  <vuln vid="FIXME (make newentry)">
    <topic>FIXME -- FIXME</topic>
    <affects>
      <package>
	<name>openvpn-devel</name>
	<range><lt>FIXME</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>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.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2016-6329</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2016-6329</url>
    </references>
    <dates>
      <discovery>2017-01-31</discovery>
      <entry>2026-10-25</entry>
    </dates>
  </vuln>