Vulnerability-Lookup

CVE-2016-6329 (GCVE-0-2016-6329)

Vulnerability from cvelistv5 – Published: 2017-01-31 22:00 – Updated: 2024-08-06 01:29

Summary

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.

Severity

5.9 (Medium)


                        
                          CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

CWE

Assigner

redhat

References

10 references

URL	Tags
https://sweet32.info/	x_refsource_MISC
https://h20566.www2.hpe.com/portal/site/hpsc/publ…	x_refsource_CONFIRM
http://www.securitytracker.com/id/1036695	vdb-entryx_refsource_SECTRACK
http://www-01.ibm.com/support/docview.wss?uid=swg…	x_refsource_CONFIRM
http://www-01.ibm.com/support/docview.wss?uid=swg…	x_refsource_CONFIRM
https://security.gentoo.org/glsa/201611-02	vendor-advisoryx_refsource_GENTOO
https://community.openvpn.net/openvpn/wiki/SWEET32	x_refsource_CONFIRM
http://www-01.ibm.com/support/docview.wss?uid=nas…	x_refsource_CONFIRM
http://www.securityfocus.com/bid/92631	vdb-entryx_refsource_BID
https://cert-portal.siemens.com/productcert/pdf/s…	x_refsource_CONFIRM

Date Public

2016-08-24 00:00

Show details on NVD website

JSON

To clipboard

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      "published": "2017-01-31T22:59:00.377",
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    "redhat_vex": {
      "current_release_date": "2025-11-21T16:25:33+00:00",
      "cve": "CVE-2016-6329",
      "id": "CVE-2016-6329",
      "initial_release_date": "2016-08-24T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "openvpn: Birthday attack against BF-CBC used by default (SWEET32)",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2016/cve-2016-6329.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-05-21T03:04:21Z",
      "cve": "CVE-2016-6329",
      "id": "CVE-2016-6329",
      "initial_release_date": "2023-02-15T04:59:29Z",
      "product_status:known_affected": "23",
      "product_status:known_not_affected": "2",
      "product_status:recommended": "31",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2016-6329",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2016-6329.json",
      "version": "11"
    }
  }
}

ubuntu-cve-2016-6329

Vulnerability from osv_ubuntu

Published

2017-01-31 00:00

Modified

2025-09-08 16:43

Summary

Details

Severity

5.9 (Medium)


                    
                      CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

N/A (UNKNOWN)

low

References

URL

Type

	https://ubuntu.com/security/CVE-2016-6329	REPORT
	https://community.openvpn.net/openvpn/wiki/SWEET32	REPORT
	https://sweet32.info/	REPORT
	https://ubuntu.com/security/notices/USN-3339-1	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2016-6329	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "openvpn",
            "binary_version": "2.3.2-7ubuntu3.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "openvpn",
        "purl": "pkg:deb/ubuntu/openvpn@2.3.2-7ubuntu3.2?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.3.2-7ubuntu3.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.3.2-4ubuntu1",
        "2.3.2-5ubuntu1",
        "2.3.2-7ubuntu1",
        "2.3.2-7ubuntu2",
        "2.3.2-7ubuntu3",
        "2.3.2-7ubuntu3.1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "openvpn",
            "binary_version": "2.3.10-1ubuntu2.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "openvpn",
        "purl": "pkg:deb/ubuntu/openvpn@2.3.10-1ubuntu2.1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.3.10-1ubuntu2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.3.7-1ubuntu1",
        "2.3.7-2ubuntu1",
        "2.3.8-1ubuntu1",
        "2.3.10-1ubuntu1",
        "2.3.10-1ubuntu2"
      ]
    }
  ],
  "aliases": [],
  "details": "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.",
  "id": "UBUNTU-CVE-2016-6329",
  "modified": "2025-09-08T16:43:49Z",
  "published": "2017-01-31T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2016-6329"
    },
    {
      "type": "REPORT",
      "url": "https://community.openvpn.net/openvpn/wiki/SWEET32"
    },
    {
      "type": "REPORT",
      "url": "https://sweet32.info/"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-3339-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2016-6329"
    }
  ],
  "related": [
    "USN-3339-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "low",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2016-6329"
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2016-6329 (GCVE-0-2016-6329)

ubuntu-cve-2016-6329

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature