ubuntu-cve-2026-4948
Vulnerability from osv_ubuntu
Published
2026-03-27 06:16
Modified
2026-05-20 15:24
Summary
Details

A flaw was found in firewalld. A local unprivileged user can exploit this vulnerability by mis-authorizing two runtime D-Bus (Desktop Bus) setters, setZoneSettings2 and setPolicySettings. This mis-authorization allows the user to modify the runtime firewall state without proper authentication, leading to unauthorized changes in network security configurations.

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "firewall-applet",
            "binary_version": "0.4.0-1ubuntu0.1"
          },
          {
            "binary_name": "firewall-config",
            "binary_version": "0.4.0-1ubuntu0.1"
          },
          {
            "binary_name": "firewalld",
            "binary_version": "0.4.0-1ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "firewalld",
        "purl": "pkg:deb/ubuntu/firewalld@0.4.0-1ubuntu0.1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.3.13-1",
        "0.3.14.2-1",
        "0.3.14.2-2",
        "0.4.0-1",
        "0.4.0-1ubuntu0.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "firewall-applet",
            "binary_version": "0.4.4.6-1"
          },
          {
            "binary_name": "firewall-config",
            "binary_version": "0.4.4.6-1"
          },
          {
            "binary_name": "firewalld",
            "binary_version": "0.4.4.6-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "firewalld",
        "purl": "pkg:deb/ubuntu/firewalld@0.4.4.6-1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.4.4.5-2",
        "0.4.4.6-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "firewall-applet",
            "binary_version": "0.8.2-1"
          },
          {
            "binary_name": "firewall-config",
            "binary_version": "0.8.2-1"
          },
          {
            "binary_name": "firewalld",
            "binary_version": "0.8.2-1"
          },
          {
            "binary_name": "python3-firewall",
            "binary_version": "0.8.2-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "firewalld",
        "purl": "pkg:deb/ubuntu/firewalld@0.8.2-1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.7.1-1ubuntu9",
        "0.7.2-1",
        "0.8.0-1",
        "0.8.0-2",
        "0.8.1-1",
        "0.8.2-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "firewall-applet",
            "binary_version": "1.1.1-1ubuntu1"
          },
          {
            "binary_name": "firewall-config",
            "binary_version": "1.1.1-1ubuntu1"
          },
          {
            "binary_name": "firewalld",
            "binary_version": "1.1.1-1ubuntu1"
          },
          {
            "binary_name": "firewalld-tests",
            "binary_version": "1.1.1-1ubuntu1"
          },
          {
            "binary_name": "python3-firewall",
            "binary_version": "1.1.1-1ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "firewalld",
        "purl": "pkg:deb/ubuntu/firewalld@1.1.1-1ubuntu1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.9.3-2ubuntu1",
        "1.0.1-2ubuntu4",
        "1.0.2-1ubuntu1",
        "1.0.3-1ubuntu2",
        "1.1.0-1ubuntu1",
        "1.1.0-1ubuntu3",
        "1.1.0-1ubuntu4",
        "1.1.1-1ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "firewall-applet",
            "binary_version": "2.1.1-1"
          },
          {
            "binary_name": "firewall-config",
            "binary_version": "2.1.1-1"
          },
          {
            "binary_name": "firewalld",
            "binary_version": "2.1.1-1"
          },
          {
            "binary_name": "firewalld-tests",
            "binary_version": "2.1.1-1"
          },
          {
            "binary_name": "python3-firewall",
            "binary_version": "2.1.1-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "firewalld",
        "purl": "pkg:deb/ubuntu/firewalld@2.1.1-1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.3.3-1",
        "2.0.1-1",
        "2.0.1-2",
        "2.0.2-1",
        "2.1.0-1",
        "2.1.1-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "firewall-applet",
            "binary_version": "2.3.1-2ubuntu1"
          },
          {
            "binary_name": "firewall-config",
            "binary_version": "2.3.1-2ubuntu1"
          },
          {
            "binary_name": "firewalld",
            "binary_version": "2.3.1-2ubuntu1"
          },
          {
            "binary_name": "firewalld-tests",
            "binary_version": "2.3.1-2ubuntu1"
          },
          {
            "binary_name": "python3-firewall",
            "binary_version": "2.3.1-2ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "firewalld",
        "purl": "pkg:deb/ubuntu/firewalld@2.3.1-2ubuntu1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.3.0-2",
        "2.3.0-3",
        "2.3.0-4",
        "2.3.1-1",
        "2.3.1-2",
        "2.3.1-2ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "firewall-applet",
            "binary_version": "2.3.1-3"
          },
          {
            "binary_name": "firewall-config",
            "binary_version": "2.3.1-3"
          },
          {
            "binary_name": "firewalld",
            "binary_version": "2.3.1-3"
          },
          {
            "binary_name": "firewalld-tests",
            "binary_version": "2.3.1-3"
          },
          {
            "binary_name": "python3-firewall",
            "binary_version": "2.3.1-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "firewalld",
        "purl": "pkg:deb/ubuntu/firewalld@2.3.1-3?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.3.1-2ubuntu1",
        "2.3.1-3"
      ]
    }
  ],
  "aliases": [],
  "details": "A flaw was found in firewalld. A local unprivileged user can exploit this vulnerability by mis-authorizing two runtime D-Bus (Desktop Bus) setters, setZoneSettings2 and setPolicySettings. This mis-authorization allows the user to modify the runtime firewall state without proper authentication, leading to unauthorized changes in network security configurations.",
  "id": "UBUNTU-CVE-2026-4948",
  "modified": "2026-05-20T15:24:31Z",
  "published": "2026-03-27T06:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-4948"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-4948"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2452086"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-4948"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-4948"
  ]
}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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