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CVE details

CVE-2013-2061

The openvpn_decrypt function in crypto.c in OpenVPN 2.3.0 and earlier, when running in UDP mode, allows remote attackers to obtain sensitive information via a timing attack involving an HMAC comparison function that does not run in constant time and a padding oracle attack on the CBC mode cipher.

Score
2.6 low
Published
2013-11-18
Links
NVD · cve.org

Affected ports (1)

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

VuXML

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>The openvpn_decrypt function in crypto.c in OpenVPN 2.3.0 and earlier,
	when running in UDP mode, allows remote attackers to obtain sensitive
	information via a timing attack involving an HMAC comparison function
	that does not run in constant time and a padding oracle attack on the
	CBC mode cipher.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2013-2061</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2013-2061</url>
    </references>
    <dates>
      <discovery>2013-11-18</discovery>
      <entry>2026-10-25</entry>
    </dates>
  </vuln>