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ettercap — security advisory

Type: advisorySources: OSVAdvisory ID: UBUNTU-CVE-2026-3606

A vulnerability has been found in Ettercap 0.8.4-Garofalo. Affected by this vulnerability is the function add_data_segment of the file src/ettercap/utils/etterfilter/ef_output.c of the component etterfilter. The manipulation leads to out-of-bounds read. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Products
ettercap
Affected versions
1:0.8.2-10build1, 1:0.8.2-10build2, 1:0.8.2-10build3, 1:0.8.2-10build4, 1:0.8.2-10build6, 1:0.8.2-2, 1:0.8.2-2build1, 1:0.8.2-2ubuntu1.16.04.1, 1:0.8.3-1ubuntu1, 1:0.8.3-2, 1:0.8.3-2~build1, 1:0.8.3-3, 1:0.8.3-5, 1:0.8.3-6, 1:0.8.3-7, 1:0.8.3.1-12, 1:0.8.3.1-13, 1:0.8.3.1-13build2, 1:0.8.3.1-13build3, 1:0.8.3.1-14, 1:0.8.3.1-15, 1:0.8.3.1-15build1, 1:0.8.3.1-16, 1:0.8.3.1-3, 1:0.8.3.1-4, 1:0.8.3.1-4build1, 1:0.8.3.1-5, 1:0.8.4-2, 1:0.8.4-4, 1:0.8.4-5, 1:0.8.4.1-1, 1:0.8.4.1-2, 1:0.8.4.1-2build1
Fixed versions
Not specified
CVEs
CVE-2026-3606
Confirmed fixed CVEs
Not specified
Updated in this feed
1 Nov 2026, 17:20 UTC · Revision 1

Source evidence

UBUNTU-CVE-2026-3606

core-osv · Original source

Published 5 Mar 2026, 22:16 UTC

A vulnerability has been found in Ettercap 0.8.4-Garofalo. Affected by this vulnerability is the function add_data_segment of the file src/ettercap/utils/etterfilter/ef_output.c of the component etterfilter. The manipulation leads to out-of-bounds read. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.

osv:UBUNTU-CVE-2026-3606

ettercap

Fixed versions: Not specified

ettercap

Fixed versions: Not specified

ettercap

Fixed versions: Not specified

ettercap

Fixed versions: Not specified

ettercap

Fixed versions: Not specified

ettercap

Fixed versions: Not specified

ettercap

Fixed versions: Not specified

ettercap

Fixed versions: Not specified

Complete source record
{
  "id": "3c4ddf6777bee68d1014d2e3c19d96b7de8cc6ef1c0c06b600a1c8f6b626a260",
  "url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-3606",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UBUNTU-CVE-2026-3606",
    "summary": "A vulnerability has been found in Ettercap 0.8.4-Garofalo. Affected by this vulnerability is the function add_data_segment of the file src/ettercap/utils/etterfilter/ef_output.c of the component etterfilter. The manipulation leads to out-of-bounds read. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.",
    "evidence": "osv:UBUNTU-CVE-2026-3606",
    "products": [
      {
        "name": {
          "value": "ettercap",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1:0.8.2-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1:0.8.2-2build1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1:0.8.2-2ubuntu1.16.04.1",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "ettercap",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1:0.8.2-10build1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1:0.8.2-10build2",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1:0.8.2-10build3",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1:0.8.2-10build4",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "ettercap",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1:0.8.2-10build6",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "1:0.8.3-1ubuntu1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "1:0.8.3-2~build1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "1:0.8.3-2",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "1:0.8.3-3",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "1:0.8.3-5",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "1:0.8.3-6",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "1:0.8.3-7",
            "evidence": "/affected/2/versions"
          }
        ]
      },
      {
        "name": {
          "value": "ettercap",
          "evidence": "/affected/3/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1:0.8.3.1-3",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "1:0.8.3.1-4",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "1:0.8.3.1-4build1",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "1:0.8.3.1-5",
            "evidence": "/affected/3/versions"
          }
        ]
      },
      {
        "name": {
          "value": "ettercap",
          "evidence": "/affected/4/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1:0.8.3.1-12",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "1:0.8.3.1-13",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "1:0.8.3.1-13build2",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "1:0.8.3.1-13build3",
            "evidence": "/affected/4/versions"
          }
        ]
      },
      {
        "name": {
          "value": "ettercap",
          "evidence": "/affected/5/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1:0.8.3.1-14",
            "evidence": "/affected/5/versions"
          },
          {
            "value": "1:0.8.3.1-15",
            "evidence": "/affected/5/versions"
          }
        ]
      },
      {
        "name": {
          "value": "ettercap",
          "evidence": "/affected/6/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1:0.8.4.1-2",
            "evidence": "/affected/6/versions"
          },
          {
            "value": "1:0.8.4.1-2build1",
            "evidence": "/affected/6/versions"
          }
        ]
      },
      {
        "name": {
          "value": "ettercap",
          "evidence": "/affected/7/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1:0.8.3.1-15",
            "evidence": "/affected/7/versions"
          },
          {
            "value": "1:0.8.3.1-15build1",
            "evidence": "/affected/7/versions"
          },
          {
            "value": "1:0.8.3.1-16",
            "evidence": "/affected/7/versions"
          },
          {
            "value": "1:0.8.4-2",
            "evidence": "/affected/7/versions"
          },
          {
            "value": "1:0.8.4-4",
            "evidence": "/affected/7/versions"
          },
          {
            "value": "1:0.8.4-5",
            "evidence": "/affected/7/versions"
          },
          {
            "value": "1:0.8.4.1-1",
            "evidence": "/affected/7/versions"
          },
          {
            "value": "1:0.8.4.1-2",
            "evidence": "/affected/7/versions"
          }
        ]
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "UBUNTU-CVE-2026-3606",
      "aliases": [
        "UBUNTU-CVE-2026-3606"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"
        },
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
        },
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P"
        },
        {
          "type": "Ubuntu",
          "score": "medium"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "ettercap",
            "purl": "pkg:deb/ubuntu/ettercap?arch=source&distro=xenial",
            "ecosystem": "Ubuntu:16.04:LTS"
          },
          "versions": [
            "1:0.8.2-2",
            "1:0.8.2-2build1",
            "1:0.8.2-2ubuntu1.16.04.1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3606.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "ettercap-common",
                "binary_version": "1:0.8.2-2ubuntu1.16.04.1"
              },
              {
                "binary_name": "ettercap-graphical",
                "binary_version": "1:0.8.2-2ubuntu1.16.04.1"
              },
              {
                "binary_name": "ettercap-text-only",
                "binary_version": "1:0.8.2-2ubuntu1.16.04.1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "ettercap",
            "purl": "pkg:deb/ubuntu/ettercap?arch=source&distro=bionic",
            "ecosystem": "Ubuntu:18.04:LTS"
          },
          "versions": [
            "1:0.8.2-10build1",
            "1:0.8.2-10build2",
            "1:0.8.2-10build3",
            "1:0.8.2-10build4"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3606.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "ettercap-common",
                "binary_version": "1:0.8.2-10build4"
              },
              {
                "binary_name": "ettercap-graphical",
                "binary_version": "1:0.8.2-10build4"
              },
              {
                "binary_name": "ettercap-text-only",
                "binary_version": "1:0.8.2-10build4"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "ettercap",
            "purl": "pkg:deb/ubuntu/ettercap?arch=source&distro=focal",
            "ecosystem": "Ubuntu:20.04:LTS"
          },
          "versions": [
            "1:0.8.2-10build6",
            "1:0.8.3-1ubuntu1",
            "1:0.8.3-2~build1",
            "1:0.8.3-2",
            "1:0.8.3-3",
            "1:0.8.3-5",
            "1:0.8.3-6",
            "1:0.8.3-7"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3606.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "ettercap-common",
                "binary_version": "1:0.8.3-7"
              },
              {
                "binary_name": "ettercap-graphical",
                "binary_version": "1:0.8.3-7"
              },
              {
                "binary_name": "ettercap-text-only",
                "binary_version": "1:0.8.3-7"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "ettercap",
            "purl": "pkg:deb/ubuntu/ettercap?arch=source&distro=jammy",
            "ecosystem": "Ubuntu:22.04:LTS"
          },
          "versions": [
            "1:0.8.3.1-3",
            "1:0.8.3.1-4",
            "1:0.8.3.1-4build1",
            "1:0.8.3.1-5"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3606.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "ettercap-common",
                "binary_version": "1:0.8.3.1-5"
              },
              {
                "binary_name": "ettercap-graphical",
                "binary_version": "1:0.8.3.1-5"
              },
              {
                "binary_name": "ettercap-text-only",
                "binary_version": "1:0.8.3.1-5"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "ettercap",
            "purl": "pkg:deb/ubuntu/ettercap?arch=source&distro=noble",
            "ecosystem": "Ubuntu:24.04:LTS"
          },
          "versions": [
            "1:0.8.3.1-12",
            "1:0.8.3.1-13",
            "1:0.8.3.1-13build2",
            "1:0.8.3.1-13build3"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3606.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "ettercap-common",
                "binary_version": "1:0.8.3.1-13build3"
              },
              {
                "binary_name": "ettercap-graphical",
                "binary_version": "1:0.8.3.1-13build3"
              },
              {
                "binary_name": "ettercap-text-only",
                "binary_version": "1:0.8.3.1-13build3"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "ettercap",
            "purl": "pkg:deb/ubuntu/ettercap?arch=source&distro=questing",
            "ecosystem": "Ubuntu:25.10"
          },
          "versions": [
            "1:0.8.3.1-14",
            "1:0.8.3.1-15"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3606.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "ettercap-common",
                "binary_version": "1:0.8.3.1-15"
              },
              {
                "binary_name": "ettercap-graphical",
                "binary_version": "1:0.8.3.1-15"
              },
              {
                "binary_name": "ettercap-text-only",
                "binary_version": "1:0.8.3.1-15"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "ettercap",
            "purl": "pkg:deb/ubuntu/ettercap?arch=source&distro=stonking",
            "ecosystem": "Ubuntu:26.10"
          },
          "versions": [
            "1:0.8.4.1-2",
            "1:0.8.4.1-2build1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3606.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "ettercap-common",
                "binary_version": "1:0.8.4.1-2build1"
              },
              {
                "binary_name": "ettercap-graphical",
                "binary_version": "1:0.8.4.1-2build1"
              },
              {
                "binary_name": "ettercap-text-only",
                "binary_version": "1:0.8.4.1-2build1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "ettercap",
            "purl": "pkg:deb/ubuntu/ettercap?arch=source&distro=resolute",
            "ecosystem": "Ubuntu:26.04:LTS"
          },
          "versions": [
            "1:0.8.3.1-15",
            "1:0.8.3.1-15build1",
            "1:0.8.3.1-16",
            "1:0.8.4-2",
            "1:0.8.4-4",
            "1:0.8.4-5",
            "1:0.8.4.1-1",
            "1:0.8.4.1-2"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3606.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "ettercap-common",
                "binary_version": "1:0.8.4.1-2"
              },
              {
                "binary_name": "ettercap-graphical",
                "binary_version": "1:0.8.4.1-2"
              },
              {
                "binary_name": "ettercap-text-only",
                "binary_version": "1:0.8.4.1-2"
              }
            ]
          }
        }
      ],
      "modified": "2026-10-27T04:17:55.308556811Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-3606"
      ],
      "references": [
        "https://ubuntu.com/security/CVE-2026-3606",
        "https://www.cve.org/CVERecord?id=CVE-2026-3606",
        "https://github.com/Ettercap/ettercap/",
        "https://github.com/Ettercap/ettercap/issues/1297",
        "https://github.com/oneafter/0202/blob/main/et/repro",
        "https://vuldb.com/?ctiid.349218",
        "https://vuldb.com/?id.349218",
        "https://vuldb.com/?submit.764648"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-3606",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/1/score"
  },
  "source_id": "core-osv",
  "document_id": 460327,
  "published_at": "2026-03-05T22:16:00+00:00"
}