{"id":"CVE-2022-21682","summary":"flatpak-builder can access files outside the build directory.","details":"Flatpak is a Linux application sandboxing and distribution framework. A path traversal vulnerability affects versions of Flatpak prior to 1.12.3 and 1.10.6. flatpak-builder applies `finish-args` last in the build. At this point the build directory will have the full access that is specified in the manifest, so running `flatpak build` against it will gain those permissions. Normally this will not be done, so this is not problem. However, if `--mirror-screenshots-url` is specified, then flatpak-builder will launch `flatpak build --nofilesystem=host appstream-utils mirror-screenshots` after finalization, which can lead to issues even with the `--nofilesystem=host` protection. In normal use, the only issue is that these empty directories can be created wherever the user has write permissions. However, a malicious application could replace the `appstream-util` binary and potentially do something more hostile. This has been resolved in Flatpak 1.12.3 and 1.10.6 by changing the behaviour of `--nofilesystem=home` and `--nofilesystem=host`.","aliases":["GHSA-8ch7-5j3h-g4fx"],"modified":"2026-04-11T12:38:35.707899Z","published":"2022-01-13T00:00:00Z","related":["ALSA-2022:7458","MGASA-2022-0131","SUSE-SU-2022:0712-1","openSUSE-SU-2022:0712-1","openSUSE-SU-2024:11755-1","openSUSE-SU-2024:11756-1"],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-22"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/21xxx/CVE-2022-21682.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/21xxx/CVE-2022-21682.json"},{"type":"ADVISORY","url":"https://github.com/flatpak/flatpak/security/advisories/GHSA-8ch7-5j3h-g4fx"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APFTBYGJJVJPFVHRXUW5PII5XOAFI4KH/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IXKBERLJRYV7KXKGXOLI6IOXVBQNN4DP/"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-21682"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202312-12"},{"type":"ADVISORY","url":"https://www.debian.org/security/2022/dsa-5049"},{"type":"FIX","url":"https://github.com/flatpak/flatpak/commit/445bddeee657fdc8d2a0a1f0de12975400d4fc1a"},{"type":"FIX","url":"https://github.com/flatpak/flatpak/commit/4d11f77aa7fd3e64cfa80af89d92567ab9e8e6fa"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/flatpak/flatpak","events":[{"introduced":"0"},{"fixed":"e50a8fd4c90c3a1dd581a516c4f24ada03a9bf06"},{"fixed":"6abe5fe027c0c4bf8f3635c76f2bce6ae0ab43ba"},{"introduced":"bcdc073041e0c93e15aa108b94cb7a39a79dcdf3"},{"fixed":"103ed5c02c8453580fac19e5122d150f44f6774f"},{"fixed":"445bddeee657fdc8d2a0a1f0de12975400d4fc1a"},{"fixed":"4d11f77aa7fd3e64cfa80af89d92567ab9e8e6fa"}],"database_specific":{"cpe":["cpe:2.3:a:flatpak:flatpak:*:*:*:*:*:*:*:*","cpe:2.3:a:flatpak:flatpak-builder:*:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"0"},{"fixed":"1.10.7"},{"fixed":"1.2.2"},{"introduced":"1.11.1"},{"fixed":"1.12.4"}],"source":["CPE_FIELD","REFERENCES"]}}],"versions":["0.1","0.10.0","0.10.1","0.10.2","0.11.1","0.11.2","0.11.3","0.11.4","0.11.5","0.11.6","0.11.7","0.11.8","0.11.8.1","0.11.8.2","0.11.8.3","0.2","0.2.1","0.3","0.3.1","0.3.2","0.3.3","0.3.4","0.3.5","0.3.6","0.4.0","0.4.1","0.4.10","0.4.11","0.4.12","0.4.13","0.4.2","0.4.2.1","0.4.3","0.4.4","0.4.5","0.4.6","0.4.7","0.4.8","0.4.9","0.5.0","0.5.1","0.5.2","0.6.0","0.6.1","0.6.10","0.6.11","0.6.12","0.6.13","0.6.14","0.6.2","0.6.3","0.6.4","0.6.5","0.6.6","0.6.7","0.6.8","0.6.9","0.8.0","0.8.1","0.9.1","0.9.10","0.9.11","0.9.12","0.9.2","0.9.3","0.9.4","0.9.5","0.9.6","0.9.7","0.9.8","0.9.9","0.9.98","0.9.98.1","0.9.98.2","0.9.99","0.99.1","0.99.2","0.99.3","1.0.0","1.0.1","1.0.2","1.0.3","1.1.0","1.1.1","1.1.2","1.1.3","1.10.0","1.10.1","1.10.2","1.10.3","1.10.4","1.10.5","1.10.6","1.11.1","1.11.2","1.11.3","1.12.0","1.12.1","1.12.2","1.12.3","1.2.0","1.2.1","1.3.0","1.3.1","1.3.2","1.3.3","1.3.4","1.4.0","1.5.0","1.5.1","1.5.2","1.6.0","1.6.1","1.6.2","1.7.1","1.7.2","1.7.3","1.8.0","1.9.1","1.9.2","1.9.3"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-21682.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N"}]}