Home/CVE/OpenVPN, when using a 64-bit block cipher, makes it easier for remote attackers to obtain cleartext data via a birthday
CVE

CVE-2016-6329

OpenVPN, when using a 64-bit block cipher, makes it easier for remote attackers to obtain cleartext data via a birthday

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.

MEDIUM · CVSS 5.9 EPSS 0.05509
Monitor
  • EPSS percentile: top 10% of all CVEs by exploitation likelihood
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
▤

Affected Products & Versions

1
openvpn<= 2.3.14
▣

Scoring & Timeline

5.9
MEDIUM · CVSS v3.0 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD31 Jan 2017 · 10:59 PM
CVSS VectorCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
⚑

Vendor Advisories

4
suse-csafSUSE-SU-2017:2838-1
usnUSN-3339-1
suse-csafSUSE-SU-2017:1622-1
cisa-csafcisa-csaf-csaf_files-OT-white-2019-icsa-19-192-04
🔗

References & Sources

10
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www-01.ibm.com/support/docview.wss?uid=nas8N1021697Permissions RequiredThird 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 AdvisoryVDB Entry
http://www.securitytracker.com/id/1036695Third Party AdvisoryVDB Entry
https://cert-portal.siemens.com/productcert/pdf/ssa-556833.pdf
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