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flightgear — security advisory

Type: advisorySources: OSVAdvisory ID: DEBIAN-CVE-2017-8921

In FlightGear before 2017.2.1, the FGCommand interface allows overwriting any file the user has write access to, but not with arbitrary data: only with the contents of a FlightGear flightplan (XML). A resource such as a malicious third-party aircraft could exploit this to damage files belonging to the user. Both this issue and CVE-2016-9956 are directory traversal vulnerabilities in Autopilot/route_mgr.cxx - this one exists because of an incomplete fix for CVE-2016-9956.

Products
flightgear
Affected versions
Not specified
Fixed versions
1:2016.4.4+dfsg-3
CVEs
CVE-2017-8921
Confirmed fixed CVEs
Not specified
Updated in this feed
30 Oct 2026, 19:04 UTC · Revision 1

Source evidence

DEBIAN-CVE-2017-8921

core-osv · Original source

Published 12 May 2017, 19:29 UTC

In FlightGear before 2017.2.1, the FGCommand interface allows overwriting any file the user has write access to, but not with arbitrary data: only with the contents of a FlightGear flightplan (XML). A resource such as a malicious third-party aircraft could exploit this to damage files belonging to the user. Both this issue and CVE-2016-9956 are directory traversal vulnerabilities in Autopilot/route_mgr.cxx - this one exists because of an incomplete fix for CVE-2016-9956.

osv:DEBIAN-CVE-2017-8921

flightgear

Fixed versions: 1:2016.4.4+dfsg-3

flightgear

Fixed versions: 1:2016.4.4+dfsg-3

Complete source record
{
  "id": "9b778086247f922a74b8cdadc58052d154af736e86b8381f7558b4ef6a841de3",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2017-8921",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2017-8921",
    "summary": "In FlightGear before 2017.2.1, the FGCommand interface allows overwriting any file the user has write access to, but not with arbitrary data: only with the contents of a FlightGear flightplan (XML). A resource such as a malicious third-party aircraft could exploit this to damage files belonging to the user. Both this issue and CVE-2016-9956 are directory traversal vulnerabilities in Autopilot/route_mgr.cxx - this one exists because of an incomplete fix for CVE-2016-9956.",
    "evidence": "osv:DEBIAN-CVE-2017-8921",
    "products": [
      {
        "name": {
          "value": "flightgear",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1:2016.4.4+dfsg-3",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "flightgear",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1:2016.4.4+dfsg-3",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "DEBIAN-CVE-2017-8921",
      "aliases": [
        "DEBIAN-CVE-2017-8921"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1:2016.4.4+dfsg-3"
                }
              ]
            }
          ],
          "package": {
            "name": "flightgear",
            "purl": "pkg:deb/debian/flightgear?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2017-8921.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1:2016.4.4+dfsg-3"
                }
              ]
            }
          ],
          "package": {
            "name": "flightgear",
            "purl": "pkg:deb/debian/flightgear?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2017-8921.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-15T18:00:05.372932093Z",
      "provider": "osv",
      "upstream": [
        "CVE-2017-8921"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2017-8921"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2017-8921",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 335503,
  "published_at": "2017-05-12T19:29:00.3+00:00"
}