Medium severity · published Jan 31, 2017
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…
5.9
CVSS
5.9%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)5.9% · higher than 93% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
Openvpn · Openvpn
through 2.3.14 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-6329
CVE.org
https://www.cve.org/CVERecord?id=CVE-2016-6329
Permissions Required
http://www-01.ibm.com/support/docview.wss?uid=nas8N1021697
Third Party Advisory
http://www-01.ibm.com/support/docview.wss?uid=swg21991482
Third Party Advisory
http://www-01.ibm.com/support/docview.wss?uid=swg21995039
Third Party Advisory
http://www.securityfocus.com/bid/92631
Third Party Advisory
http://www.securitytracker.com/id/1036695
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/pdf/ssa-556833.pdf
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