VulnerabilityModified
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…
MEDIUM 5.9EPSS 5.94%
Does this matter?
Lower severity and a low EPSS score (5.94%). Track it; it rarely justifies an emergency change on its own.
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 3.0
- 5.9 MEDIUMCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 5.94% probability · 93th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-200, CWE-310
- Affected
- openvpn/openvpn
- Source
- secalert@redhat.com
References
- http://www-01.ibm.com/support/docview.wss?uid=nas8N1021697Permissions Required, Third Party Advisory
- http://www-01.ibm.com/support/docview.wss?uid=swg21991482Third Party Advisory
- http://www-01.ibm.com/support/docview.wss?uid=swg21995039Third Party Advisory
- http://www.securityfocus.com/bid/92631Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1036695Third Party Advisory, VDB Entry
- https://cert-portal.siemens.com/productcert/pdf/ssa-556833.pdf
- https://community.openvpn.net/openvpn/wiki/SWEET32Vendor Advisory
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05369403Third Party Advisory
- https://security.gentoo.org/glsa/201611-02Third Party Advisory
- https://sweet32.info/Technical Description, Third Party Advisory
- http://www-01.ibm.com/support/docview.wss?uid=nas8N1021697Permissions Required, Third Party Advisory
- http://www-01.ibm.com/support/docview.wss?uid=swg21991482Third Party Advisory
- http://www-01.ibm.com/support/docview.wss?uid=swg21995039Third Party Advisory
- http://www.securityfocus.com/bid/92631Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1036695Third Party Advisory, VDB Entry
- https://cert-portal.siemens.com/productcert/pdf/ssa-556833.pdf
- https://community.openvpn.net/openvpn/wiki/SWEET32Vendor Advisory
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05369403Third Party Advisory
- https://security.gentoo.org/glsa/201611-02Third Party Advisory
- https://sweet32.info/Technical Description, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.