fkie_cve-2021-47427
Vulnerability from fkie_nvd
Published
2024-05-21 15:15
Modified
2024-12-31 20:04
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: iscsi: Fix iscsi_task use after free Commit d39df158518c ("scsi: iscsi: Have abort handler get ref to conn") added iscsi_get_conn()/iscsi_put_conn() calls during abort handling but then also changed the handling of the case where we detect an already completed task where we now end up doing a goto to the common put/cleanup code. This results in a iscsi_task use after free, because the common cleanup code will do a put on the iscsi_task. This reverts the goto and moves the iscsi_get_conn() to after we've checked if the iscsi_task is valid.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1642f51ac0d4f2b55d5748094c49ff8f7191b93cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/258aad75c62146453d03028a44f2f1590d58e1f6Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/1642f51ac0d4f2b55d5748094c49ff8f7191b93cPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/258aad75c62146453d03028a44f2f1590d58e1f6Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel 5.15
linux linux_kernel 5.15
linux linux_kernel 5.15
linux linux_kernel 5.15


To clipboard 

{
   configurations: [
      {
         nodes: [
            {
               cpeMatch: [
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "0212F5AF-8179-4A29-9B5A-E9060BD1F240",
                     versionEndExcluding: "5.14.12",
                     versionStartIncluding: "5.14",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*",
                     matchCriteriaId: "E46C74C6-B76B-4C94-A6A4-FD2FFF62D644",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*",
                     matchCriteriaId: "60134C3A-06E4-48C1-B04F-2903732A4E56",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*",
                     matchCriteriaId: "0460DA88-8FE1-46A2-9DDA-1F1ABA552E71",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:*",
                     matchCriteriaId: "AF55383D-4DF2-45DC-93F7-571F4F978EAB",
                     vulnerable: true,
                  },
               ],
               negate: false,
               operator: "OR",
            },
         ],
      },
   ],
   cveTags: [],
   descriptions: [
      {
         lang: "en",
         value: "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: iscsi: Fix iscsi_task use after free\n\nCommit d39df158518c (\"scsi: iscsi: Have abort handler get ref to conn\")\nadded iscsi_get_conn()/iscsi_put_conn() calls during abort handling but\nthen also changed the handling of the case where we detect an already\ncompleted task where we now end up doing a goto to the common put/cleanup\ncode. This results in a iscsi_task use after free, because the common\ncleanup code will do a put on the iscsi_task.\n\nThis reverts the goto and moves the iscsi_get_conn() to after we've checked\nif the iscsi_task is valid.",
      },
      {
         lang: "es",
         value: "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: scsi: iscsi: corrige el uso after free de iscsi_task. Confirmación d39df158518c (\"scsi: iscsi: Have abort handler get ref to conn\") se agregaron llamadas iscsi_get_conn()/iscsi_put_conn() durante el manejo de abortos pero luego también cambió el manejo del caso en el que detectamos una tarea ya completada y ahora terminamos haciendo un acceso al código común de put/cleanup. Esto da como resultado un uso de iscsi_task después de la liberación, porque el código de limpieza común colocará iscsi_task. Esto revierte el ir a y mueve iscsi_get_conn() a después de haber verificado si iscsi_task es válido.",
      },
   ],
   id: "CVE-2021-47427",
   lastModified: "2024-12-31T20:04:00.207",
   metrics: {
      cvssMetricV31: [
         {
            cvssData: {
               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",
         },
      ],
   },
   published: "2024-05-21T15:15:28.117",
   references: [
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         tags: [
            "Patch",
         ],
         url: "https://git.kernel.org/stable/c/1642f51ac0d4f2b55d5748094c49ff8f7191b93c",
      },
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         tags: [
            "Patch",
         ],
         url: "https://git.kernel.org/stable/c/258aad75c62146453d03028a44f2f1590d58e1f6",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Patch",
         ],
         url: "https://git.kernel.org/stable/c/1642f51ac0d4f2b55d5748094c49ff8f7191b93c",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Patch",
         ],
         url: "https://git.kernel.org/stable/c/258aad75c62146453d03028a44f2f1590d58e1f6",
      },
   ],
   sourceIdentifier: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
   vulnStatus: "Analyzed",
   weaknesses: [
      {
         description: [
            {
               lang: "en",
               value: "CWE-416",
            },
         ],
         source: "nvd@nist.gov",
         type: "Primary",
      },
   ],
}


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