FKIE_CVE-2023-30549

Vulnerability from fkie_nvd - Published: 2023-04-25 21:15 - Updated: 2026-10-23 23:10
Severity
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
Apptainer is an open source container platform for Linux. There is an ext4 use-after-free flaw that is exploitable through versions of Apptainer < 1.1.0 and installations that include apptainer-suid < 1.1.8 on older operating systems where that CVE has not been patched. That includes Red Hat Enterprise Linux 7, Debian 10 buster (unless the linux-5.10 package is installed), Ubuntu 18.04 bionic and Ubuntu 20.04 focal. Use-after-free flaws in the kernel can be used to attack the kernel for denial of service and potentially for privilege escalation. Apptainer 1.1.8 includes a patch that by default disables mounting of extfs filesystem types in setuid-root mode, while continuing to allow mounting of extfs filesystems in non-setuid "rootless" mode using fuse2fs. Some workarounds are possible. Either do not install apptainer-suid (for versions 1.1.0 through 1.1.7) or set `allow setuid = no` in apptainer.conf. This requires having unprivileged user namespaces enabled and except for apptainer 1.1.x versions will disallow mounting of sif files, extfs files, and squashfs files in addition to other, less significant impacts. (Encrypted sif files are also not supported unprivileged in apptainer 1.1.x.). Alternatively, use the `limit containers` options in apptainer.conf/singularity.conf to limit sif files to trusted users, groups, and/or paths, and set `allow container extfs = no` to disallow mounting of extfs overlay files. The latter option by itself does not disallow mounting of extfs overlay partitions inside SIF files, so that's why the former options are also needed.
References
security-advisories@github.comhttps://access.redhat.com/security/cve/cve-2022-1184Not Applicable
security-advisories@github.comhttps://github.com/apptainer/apptainer/commit/5a4964f5ba9c8d89a0e353b97f51fd607670a9f7Patch
security-advisories@github.comhttps://github.com/apptainer/apptainer/releases/tag/v1.1.8Release Notes
security-advisories@github.comhttps://github.com/apptainer/apptainer/security/advisories/GHSA-j4rf-7357-f4cgMitigation, Vendor Advisory
security-advisories@github.comhttps://github.com/torvalds/linux/commit/2220eaf90992c11d888fe771055d4de3303
security-advisories@github.comhttps://github.com/torvalds/linux/commit/4f04351888a83e595571de672e0a4a8b74f
security-advisories@github.comhttps://lwn.net/Articles/932136/
security-advisories@github.comhttps://lwn.net/Articles/932137/
security-advisories@github.comhttps://security-tracker.debian.org/tracker/CVE-2022-1184Not Applicable
security-advisories@github.comhttps://security.gentoo.org/glsa/202311-13
security-advisories@github.comhttps://sylabs.io/2023/04/response-to-cve-2023-30549/
security-advisories@github.comhttps://ubuntu.com/security/CVE-2022-1184Not Applicable
security-advisories@github.comhttps://www.suse.com/security/cve/CVE-2022-1184.htmlNot Applicable
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/security/cve/cve-2022-1184Not Applicable
af854a3a-2127-422b-91ae-364da2661108https://github.com/apptainer/apptainer/commit/5a4964f5ba9c8d89a0e353b97f51fd607670a9f7Patch
af854a3a-2127-422b-91ae-364da2661108https://github.com/apptainer/apptainer/releases/tag/v1.1.8Release Notes
af854a3a-2127-422b-91ae-364da2661108https://github.com/apptainer/apptainer/security/advisories/GHSA-j4rf-7357-f4cgMitigation, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/torvalds/linux/commit/2220eaf90992c11d888fe771055d4de3303
af854a3a-2127-422b-91ae-364da2661108https://github.com/torvalds/linux/commit/4f04351888a83e595571de672e0a4a8b74f
af854a3a-2127-422b-91ae-364da2661108https://lwn.net/Articles/932136/
af854a3a-2127-422b-91ae-364da2661108https://lwn.net/Articles/932137/
af854a3a-2127-422b-91ae-364da2661108https://security-tracker.debian.org/tracker/CVE-2022-1184Not Applicable
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202311-13
af854a3a-2127-422b-91ae-364da2661108https://sylabs.io/2023/04/response-to-cve-2023-30549/
af854a3a-2127-422b-91ae-364da2661108https://ubuntu.com/security/CVE-2022-1184Not Applicable
af854a3a-2127-422b-91ae-364da2661108https://www.suse.com/security/cve/CVE-2022-1184.htmlNot Applicable
Impacted products
Vendor Product Version
lfprojects apptainer *
sylabs singularity *
redhat enterprise_linux 7.0
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "apptainer",
          "vendor": "apptainer",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.1.8"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
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              "matchCriteriaId": "DE6873C2-2BED-4420-B34A-0D4621743ED0",
              "versionEndExcluding": "1.1.8",
              "vulnerable": true
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          "operator": "OR"
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Apptainer is an open source container platform for Linux. There is an ext4 use-after-free flaw that is exploitable through versions of Apptainer \u003c 1.1.0 and installations that include apptainer-suid \u003c 1.1.8 on older operating systems where that CVE has not been patched. That includes Red Hat Enterprise Linux 7, Debian 10 buster (unless the linux-5.10 package is installed), Ubuntu 18.04 bionic and Ubuntu 20.04 focal. Use-after-free flaws in the kernel can be used to attack the kernel for denial of service and potentially for privilege escalation.\n\nApptainer 1.1.8 includes a patch that by default disables mounting of extfs filesystem types in setuid-root mode, while continuing to allow mounting of extfs filesystems in non-setuid \"rootless\" mode using fuse2fs.\n\nSome workarounds are possible. Either do not install apptainer-suid (for versions 1.1.0 through 1.1.7) or set `allow setuid = no` in apptainer.conf.  This requires having unprivileged user namespaces enabled and except for apptainer 1.1.x versions will disallow mounting of sif files, extfs files, and squashfs files in addition to other, less significant impacts.  (Encrypted sif files are also not supported unprivileged in apptainer 1.1.x.). Alternatively, use the `limit containers` options in apptainer.conf/singularity.conf to limit sif files to trusted users, groups, and/or paths, and set `allow container extfs = no` to disallow mounting of extfs overlay files.  The latter option by itself does not disallow mounting of extfs overlay partitions inside SIF files, so that\u0027s why the former options are also needed."
    },
    {
      "lang": "es",
      "value": "Apptainer es una plataforma de contenedores de c\u00f3digo abierto para Linux. Existe un fallo de uso despu\u00e9s de liberaci\u00f3n de ext4 que es explotable a trav\u00e9s de versiones de Apptainer anterior a 1.1.0 e instalaciones que incluyen apptainer-suid anterior a 1.1.8 en sistemas operativos m\u00e1s antiguos donde ese CVE no ha sido parcheado. Eso incluye Red Hat Enterprise Linux 7, Debian 10 buster (a menos que el paquete linux-5.10 est\u00e9 instalado), Ubuntu 18.04 bionic y Ubuntu 20.04 focal. Los fallos de uso despu\u00e9s de liberaci\u00f3n en el kernel pueden usarse para atacar el kernel para denegaci\u00f3n de servicio y potencialmente para escalada de privilegios.\n\nApptainer 1.1.8 incluye un parche que por defecto deshabilita el montaje de tipos de sistema de archivos extfs en modo setuid-root, mientras contin\u00faa permitiendo el montaje de sistemas de archivos extfs en modo no-setuid \u0027rootless\u0027 usando fuse2fs.\n\nAlgunas soluciones alternativas son posibles. O no instale apptainer-suid (para versiones 1.1.0 a 1.1.7) o establezca \u0027allow setuid = no\u0027 en apptainer.conf. Esto requiere tener habilitados los espacios de nombres de usuario sin privilegios y, excepto para las versiones de apptainer 1.1.x, deshabilitar\u00e1 el montaje de archivos sif, archivos extfs y archivos squashfs, adem\u00e1s de otros impactos menos significativos. (Los archivos sif cifrados tampoco son compatibles sin privilegios en apptainer 1.1.x.). Alternativamente, use las opciones \u0027limit containers\u0027 en apptainer.conf/singularity.conf para limitar los archivos sif a usuarios, grupos y/o rutas de confianza, y establezca \u0027allow container extfs = no\u0027 para deshabilitar el montaje de archivos de superposici\u00f3n extfs. Esta \u00faltima opci\u00f3n por s\u00ed misma no deshabilita el montaje de particiones de superposici\u00f3n extfs dentro de los archivos SIF, por lo que las opciones anteriores tambi\u00e9n son necesarias."
    }
  ],
  "id": "CVE-2023-30549",
  "lastModified": "2026-10-23T23:10:00.157",
  "metrics": {
    "cvssMetricV31": [
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          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
          "version": "3.1"
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        "impactScore": 4.0,
        "source": "security-advisories@github.com",
        "type": "Secondary"
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          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
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    ],
    "ssvcV203": [
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
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          "options": [
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              "exploitation": "none"
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            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
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          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-03-05T18:37:22.756636Z",
          "version": "2.0.3"
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  "published": "2023-04-25T21:15:10.767",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Not Applicable"
      ],
      "url": "https://access.redhat.com/security/cve/cve-2022-1184"
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  ]
}



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