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        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
        "title": "Terms of Use"
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          "number": "1",
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          "category": "description",
          "text": "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`.",
          "title": "Vulnerability description"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
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        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2022-21682"
        },
        {
          "category": "external",
          "summary": "https://github.com/flatpak/flatpak/commit/445bddeee657fdc8d2a0a1f0de12975400d4fc1a",
          "url": "https://github.com/flatpak/flatpak/commit/445bddeee657fdc8d2a0a1f0de12975400d4fc1a"
        },
        {
          "category": "external",
          "summary": "https://github.com/flatpak/flatpak/commit/4d11f77aa7fd3e64cfa80af89d92567ab9e8e6fa",
          "url": "https://github.com/flatpak/flatpak/commit/4d11f77aa7fd3e64cfa80af89d92567ab9e8e6fa"
        },
        {
          "category": "external",
          "summary": "https://github.com/flatpak/flatpak/security/advisories/GHSA-8ch7-5j3h-g4fx",
          "url": "https://github.com/flatpak/flatpak/security/advisories/GHSA-8ch7-5j3h-g4fx"
        },
        {
          "category": "external",
          "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APFTBYGJJVJPFVHRXUW5PII5XOAFI4KH/",
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APFTBYGJJVJPFVHRXUW5PII5XOAFI4KH/"
        },
        {
          "category": "external",
          "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IXKBERLJRYV7KXKGXOLI6IOXVBQNN4DP/",
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IXKBERLJRYV7KXKGXOLI6IOXVBQNN4DP/"
        },
        {
          "category": "external",
          "summary": "https://security.gentoo.org/glsa/202312-12",
          "url": "https://security.gentoo.org/glsa/202312-12"
        },
        {
          "category": "external",
          "summary": "https://www.debian.org/security/2022/dsa-5049",
          "url": "https://www.debian.org/security/2022/dsa-5049"
        }
      ],
      "release_date": "2022-01-13T21:15:00Z",
      "remediations": [
        {
          "category": "no_fix_planned",
          "date": "2026-06-12T13:07:19.313225Z",
          "details": "This flaw is limited to the Flatpak build workflow and only triggers when flatpak-builder is invoked with the nondefault --mirror-screenshots-url option; it does not affect the runtime of installed Flatpak apps or system services. Successful misuse requires local access to the build tree (to substitute the appstream-util helper) and, in normal use, the impact is confined to integrity of files writable by the invoking user, with no confidentiality or availability impact. Environments that do not perform Flatpak builds with flatpak-builder—or that are on Flatpak/flatpak-builder versions including the 1.12.3/1.10.6 fixes—can safely deprioritize this CVE.",
          "product_ids": [
            "CentOS-7:flatpak-0:1.0.9-13.el7_9.tuxcare.els1.x86_64",
            "CentOS-7:flatpak-0:1.0.9-13.el7_9.tuxcare.els2.x86_64",
            "CentOS-7:flatpak-0:1.0.9-13.el7_9.tuxcare.els4.x86_64",
            "CentOS-7:flatpak-0:1.0.9-13.el7_9.x86_64",
            "CentOS-7:flatpak-builder-0:1.0.0-13.el7_9.tuxcare.els1.x86_64",
            "CentOS-7:flatpak-builder-0:1.0.0-13.el7_9.tuxcare.els2.x86_64",
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            "CentOS-7:flatpak-devel-0:1.0.9-13.el7_9.tuxcare.els2.x86_64",
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            "CentOS-7:flatpak-libs-0:1.0.9-13.el7_9.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "SINGLE",
            "availabilityImpact": "NONE",
            "baseScore": 4.0,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:N",
            "version": "2.0"
          },
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "CentOS-7:flatpak-0:1.0.9-13.el7_9.tuxcare.els1.x86_64",
            "CentOS-7:flatpak-0:1.0.9-13.el7_9.tuxcare.els2.x86_64",
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        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ]
    }
  ]
}