Vulnerability-Lookup

usn-7396-1

Vulnerability from osv_ubuntu

Published

2025-03-31 12:01

Modified

2026-02-10 04:47

Summary

ovn vulnerability

Details

Marius Berntsberg, Trygve Vea, Tore Anderson, Rodolfo Alonso, Jay Faulkner, and Brian Haley discovered that OVN incorrectly handled certain crafted UDP packets. A remote attacker could possibly use this issue to bypass egress ACL rules.

References

URL

Type

	https://ubuntu.com/security/notices/USN-7396-1	ADVISORY
	https://ubuntu.com/security/CVE-2025-0650	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-0650",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "ovn-central",
            "binary_version": "20.03.2-0ubuntu0.20.04.6"
          },
          {
            "binary_name": "ovn-common",
            "binary_version": "20.03.2-0ubuntu0.20.04.6"
          },
          {
            "binary_name": "ovn-controller-vtep",
            "binary_version": "20.03.2-0ubuntu0.20.04.6"
          },
          {
            "binary_name": "ovn-docker",
            "binary_version": "20.03.2-0ubuntu0.20.04.6"
          },
          {
            "binary_name": "ovn-host",
            "binary_version": "20.03.2-0ubuntu0.20.04.6"
          },
          {
            "binary_name": "ovn-ic",
            "binary_version": "20.03.2-0ubuntu0.20.04.6"
          },
          {
            "binary_name": "ovn-ic-db",
            "binary_version": "20.03.2-0ubuntu0.20.04.6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "ovn",
        "purl": "pkg:deb/ubuntu/ovn@20.03.2-0ubuntu0.20.04.6?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "20.03.2-0ubuntu0.20.04.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.12.90~git20200107.c80e014d4-0ubuntu1",
        "2.12.90~git20200107.c80e014d4-0ubuntu2",
        "20.03.0~git20200212.9a4e68ec8-0ubuntu1",
        "20.03.0~git20200212.9a4e68ec8-0ubuntu3",
        "20.03.0-0ubuntu1",
        "20.03.1-0ubuntu1",
        "20.03.1-0ubuntu1.1",
        "20.03.1-0ubuntu1.2",
        "20.03.2-0ubuntu0.20.04.1",
        "20.03.2-0ubuntu0.20.04.2",
        "20.03.2-0ubuntu0.20.04.3",
        "20.03.2-0ubuntu0.20.04.4",
        "20.03.2-0ubuntu0.20.04.5"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-0650",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "ovn-central",
            "binary_version": "22.03.3-0ubuntu0.22.04.5"
          },
          {
            "binary_name": "ovn-common",
            "binary_version": "22.03.3-0ubuntu0.22.04.5"
          },
          {
            "binary_name": "ovn-controller-vtep",
            "binary_version": "22.03.3-0ubuntu0.22.04.5"
          },
          {
            "binary_name": "ovn-docker",
            "binary_version": "22.03.3-0ubuntu0.22.04.5"
          },
          {
            "binary_name": "ovn-host",
            "binary_version": "22.03.3-0ubuntu0.22.04.5"
          },
          {
            "binary_name": "ovn-ic",
            "binary_version": "22.03.3-0ubuntu0.22.04.5"
          },
          {
            "binary_name": "ovn-ic-db",
            "binary_version": "22.03.3-0ubuntu0.22.04.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "ovn",
        "purl": "pkg:deb/ubuntu/ovn@22.03.3-0ubuntu0.22.04.5?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "22.03.3-0ubuntu0.22.04.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "21.09.0~git20210922.6549e5842-0ubuntu1",
        "21.09.0~git20210922.6549e5842-0ubuntu2",
        "21.09.0-0ubuntu2",
        "21.12.0-0ubuntu1",
        "22.03.0~git20220218.ed81be7-0ubuntu1",
        "22.03.0-0ubuntu1",
        "22.03.2-0ubuntu0.22.04.1",
        "22.03.3-0ubuntu0.22.04.1",
        "22.03.3-0ubuntu0.22.04.2",
        "22.03.3-0ubuntu0.22.04.3"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-0650",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:24.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "ovn-central",
            "binary_version": "24.03.2-0ubuntu0.24.04.2"
          },
          {
            "binary_name": "ovn-common",
            "binary_version": "24.03.2-0ubuntu0.24.04.2"
          },
          {
            "binary_name": "ovn-controller-vtep",
            "binary_version": "24.03.2-0ubuntu0.24.04.2"
          },
          {
            "binary_name": "ovn-docker",
            "binary_version": "24.03.2-0ubuntu0.24.04.2"
          },
          {
            "binary_name": "ovn-host",
            "binary_version": "24.03.2-0ubuntu0.24.04.2"
          },
          {
            "binary_name": "ovn-ic",
            "binary_version": "24.03.2-0ubuntu0.24.04.2"
          },
          {
            "binary_name": "ovn-ic-db",
            "binary_version": "24.03.2-0ubuntu0.24.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "ovn",
        "purl": "pkg:deb/ubuntu/ovn@24.03.2-0ubuntu0.24.04.2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "24.03.2-0ubuntu0.24.04.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "23.09.0-1",
        "23.09.0-2",
        "24.03.0~git20240205.ebb7076-1",
        "24.03.1-2ubuntu1",
        "24.03.1-2ubuntu3",
        "24.03.2-0ubuntu0.24.04.1"
      ]
    }
  ],
  "aliases": [],
  "details": "Marius Berntsberg, Trygve Vea, Tore Anderson, Rodolfo Alonso, Jay Faulkner,\nand Brian Haley discovered that OVN incorrectly handled certain crafted UDP\npackets. A remote attacker could possibly use this issue to bypass egress\nACL rules.\n",
  "id": "USN-7396-1",
  "modified": "2026-02-10T04:47:47Z",
  "published": "2025-03-31T12:01:41Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-7396-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-0650"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "ovn vulnerability",
  "upstream": [
    "UBUNTU-CVE-2025-0650"
  ]
}

ubuntu-cve-2025-0650

Vulnerability from osv_ubuntu

Published

2025-01-23 17:15

Modified

2025-09-08 17:06

Summary

Details

A flaw was found in the Open Virtual Network (OVN). Specially crafted UDP packets may bypass egress access control lists (ACLs) in OVN installations configured with a logical switch with DNS records set on it and if the same switch has any egress ACLs configured. This issue can lead to unauthorized access to virtual machines and containers running on the OVN network. OVN provides rudimentary DNS caching as an optional feature to speed up lookups of frequently-used domains. When this feature is enabled, due to the OpenFlow rules that OVN installs in Open vSwitch, it is possible for an attacker to craft a UDP packet that can bypass egress ACL rules. Egress ACL rules are those that have the "direction" set to "to-lport". The OVN installation is vulnerable if a logical switch has DNS records set on it AND if the same switch has any egress ACLs configured on it. The switch is considered to have egress ACLs configured if the switch has an egress ACL configured directly on it using the "acls" column of the logical switch. A switch is also considered to have egress ACLs configured if any of its logical switch ports are part of a port group that has egress ACLs configured in its "acls" column. A python script (vuln_test.py) is attached to this advisory and can be used to determine if your installation is vulnerable. Run it in a location where "ovn-nbctl" is installed and can access the northbound database. The script will print to the console whether the installation is vulnerable.

Severity

8.1 (High)


                    
                      CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2025-0650	REPORT
	https://www.cve.org/CVERecord?id=CVE-2025-0650	REPORT
	https://www.openwall.com/lists/oss-security/2025/…	REPORT
	https://ubuntu.com/security/notices/USN-7396-1	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "ovn-central",
            "binary_version": "20.03.2-0ubuntu0.20.04.6"
          },
          {
            "binary_name": "ovn-common",
            "binary_version": "20.03.2-0ubuntu0.20.04.6"
          },
          {
            "binary_name": "ovn-controller-vtep",
            "binary_version": "20.03.2-0ubuntu0.20.04.6"
          },
          {
            "binary_name": "ovn-docker",
            "binary_version": "20.03.2-0ubuntu0.20.04.6"
          },
          {
            "binary_name": "ovn-host",
            "binary_version": "20.03.2-0ubuntu0.20.04.6"
          },
          {
            "binary_name": "ovn-ic",
            "binary_version": "20.03.2-0ubuntu0.20.04.6"
          },
          {
            "binary_name": "ovn-ic-db",
            "binary_version": "20.03.2-0ubuntu0.20.04.6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "ovn",
        "purl": "pkg:deb/ubuntu/ovn@20.03.2-0ubuntu0.20.04.6?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "20.03.2-0ubuntu0.20.04.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.12.90~git20200107.c80e014d4-0ubuntu1",
        "2.12.90~git20200107.c80e014d4-0ubuntu2",
        "20.03.0~git20200212.9a4e68ec8-0ubuntu1",
        "20.03.0~git20200212.9a4e68ec8-0ubuntu3",
        "20.03.0-0ubuntu1",
        "20.03.1-0ubuntu1",
        "20.03.1-0ubuntu1.1",
        "20.03.1-0ubuntu1.2",
        "20.03.2-0ubuntu0.20.04.1",
        "20.03.2-0ubuntu0.20.04.2",
        "20.03.2-0ubuntu0.20.04.3",
        "20.03.2-0ubuntu0.20.04.4",
        "20.03.2-0ubuntu0.20.04.5"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "ovn-central",
            "binary_version": "22.03.3-0ubuntu0.22.04.5"
          },
          {
            "binary_name": "ovn-common",
            "binary_version": "22.03.3-0ubuntu0.22.04.5"
          },
          {
            "binary_name": "ovn-controller-vtep",
            "binary_version": "22.03.3-0ubuntu0.22.04.5"
          },
          {
            "binary_name": "ovn-docker",
            "binary_version": "22.03.3-0ubuntu0.22.04.5"
          },
          {
            "binary_name": "ovn-host",
            "binary_version": "22.03.3-0ubuntu0.22.04.5"
          },
          {
            "binary_name": "ovn-ic",
            "binary_version": "22.03.3-0ubuntu0.22.04.5"
          },
          {
            "binary_name": "ovn-ic-db",
            "binary_version": "22.03.3-0ubuntu0.22.04.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "ovn",
        "purl": "pkg:deb/ubuntu/ovn@22.03.3-0ubuntu0.22.04.5?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "22.03.3-0ubuntu0.22.04.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "21.09.0~git20210922.6549e5842-0ubuntu1",
        "21.09.0~git20210922.6549e5842-0ubuntu2",
        "21.09.0-0ubuntu2",
        "21.12.0-0ubuntu1",
        "22.03.0~git20220218.ed81be7-0ubuntu1",
        "22.03.0-0ubuntu1",
        "22.03.2-0ubuntu0.22.04.1",
        "22.03.3-0ubuntu0.22.04.1",
        "22.03.3-0ubuntu0.22.04.2",
        "22.03.3-0ubuntu0.22.04.3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "ovn-central",
            "binary_version": "24.03.2-0ubuntu0.24.04.2"
          },
          {
            "binary_name": "ovn-common",
            "binary_version": "24.03.2-0ubuntu0.24.04.2"
          },
          {
            "binary_name": "ovn-controller-vtep",
            "binary_version": "24.03.2-0ubuntu0.24.04.2"
          },
          {
            "binary_name": "ovn-docker",
            "binary_version": "24.03.2-0ubuntu0.24.04.2"
          },
          {
            "binary_name": "ovn-host",
            "binary_version": "24.03.2-0ubuntu0.24.04.2"
          },
          {
            "binary_name": "ovn-ic",
            "binary_version": "24.03.2-0ubuntu0.24.04.2"
          },
          {
            "binary_name": "ovn-ic-db",
            "binary_version": "24.03.2-0ubuntu0.24.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "ovn",
        "purl": "pkg:deb/ubuntu/ovn@24.03.2-0ubuntu0.24.04.2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "24.03.2-0ubuntu0.24.04.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "23.09.0-1",
        "23.09.0-2",
        "24.03.0~git20240205.ebb7076-1",
        "24.03.1-2ubuntu1",
        "24.03.1-2ubuntu3",
        "24.03.2-0ubuntu0.24.04.1"
      ]
    }
  ],
  "aliases": [],
  "details": "A flaw was found in the Open Virtual Network (OVN). Specially crafted UDP packets may bypass egress access control lists (ACLs) in OVN installations configured with a logical switch with DNS records set on it and if the same switch has any egress ACLs configured. This issue can lead to unauthorized access to virtual machines and containers running on the OVN network. OVN provides rudimentary DNS caching as an optional feature to speed up lookups of frequently-used domains. When this feature is enabled, due to the OpenFlow rules that OVN installs in Open vSwitch, it is possible for an attacker to craft a UDP packet that can bypass egress ACL rules. Egress ACL rules are those that have the \"direction\" set to \"to-lport\". The OVN installation is vulnerable if a logical switch has DNS records set on it AND if the same switch has any egress ACLs configured on it. The switch is considered to have egress ACLs configured if the switch has an egress ACL configured directly on it using the \"acls\" column of the logical switch. A switch is also considered to have egress ACLs configured if any of its logical switch ports are part of a port group that has egress ACLs configured in its \"acls\" column. A python script (vuln_test.py) is attached to this advisory and can be used to determine if your installation is vulnerable. Run it in a location where \"ovn-nbctl\" is installed and can access the northbound database. The script will print to the console whether the installation is vulnerable.",
  "id": "UBUNTU-CVE-2025-0650",
  "modified": "2025-09-08T17:06:47Z",
  "published": "2025-01-23T17:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-0650"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-0650"
    },
    {
      "type": "REPORT",
      "url": "https://www.openwall.com/lists/oss-security/2025/01/22/5"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-7396-1"
    }
  ],
  "related": [
    "USN-7396-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2025-0650"
  ]
}

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

usn-7396-1

Vulnerability from osv_ubuntu

ubuntu-cve-2025-0650

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature