FKIE_CVE-2022-23034

Vulnerability from fkie_nvd - Published: 2022-01-25 14:15 - Updated: 2024-11-21 06:47
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
A PV guest could DoS Xen while unmapping a grant To address XSA-380, reference counting was introduced for grant mappings for the case where a PV guest would have the IOMMU enabled. PV guests can request two forms of mappings. When both are in use for any individual mapping, unmapping of such a mapping can be requested in two steps. The reference count for such a mapping would then mistakenly be decremented twice. Underflow of the counters gets detected, resulting in the triggering of a hypervisor bug check.
References
security@xen.orghttp://www.openwall.com/lists/oss-security/2022/01/25/3Mailing List, Third Party Advisory
security@xen.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OMR6UBGJW6JKND7IILGQ2CU35EQPF3E3/
security@xen.orghttps://security.gentoo.org/glsa/202208-23Third Party Advisory
security@xen.orghttps://www.debian.org/security/2022/dsa-5117Third Party Advisory
security@xen.orghttps://xenbits.xenproject.org/xsa/advisory-394.txtPatch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2022/01/25/3Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OMR6UBGJW6JKND7IILGQ2CU35EQPF3E3/
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202208-23Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2022/dsa-5117Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://xenbits.xenproject.org/xsa/advisory-394.txtPatch, Vendor Advisory
Impacted products
Vendor Product Version
xen xen *
fedoraproject fedora 34
debian debian_linux 9.0
debian debian_linux 11.0
To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A PV guest could DoS Xen while unmapping a grant To address XSA-380, reference counting was introduced for grant mappings for the case where a PV guest would have the IOMMU enabled. PV guests can request two forms of mappings. When both are in use for any individual mapping, unmapping of such a mapping can be requested in two steps. The reference count for such a mapping would then mistakenly be decremented twice. Underflow of the counters gets detected, resulting in the triggering of a hypervisor bug check."
    },
    {
      "lang": "es",
      "value": "Un hu\u00e9sped PV podr\u00eda hacer DoS a Xen mientras desmapea una concesi\u00f3n Para abordar XSA-380, fue introducido el recuento de referencias para las asignaciones de concesi\u00f3n para el caso en que un hu\u00e9sped PV tuviera el IOMMU habilitado. Los hu\u00e9spedes PV pueden solicitar dos formas de mapeo. Cuando ambas est\u00e1n usadas para cualquier mapeo individual, el desmapeo de tal mapeo puede ser solicitado en dos pasos. El conteo de referencia para tal mapeo ser\u00eda entonces err\u00f3neamente decrementado dos veces. Se detecta un desbordamiento de los contadores, resultando en el desencadenamiento de una comprobaci\u00f3n de errores del hipervisor"
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  "id": "CVE-2022-23034",
  "lastModified": "2024-11-21T06:47:51.117",
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        "baseSeverity": "LOW",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 2.1,
          "confidentialityImpact": "NONE",
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          "version": "2.0"
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  "vulnStatus": "Modified",
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          "value": "CWE-191"
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}


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