gsd-2021-27363
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine the address of the iscsi_transport structure. When an iSCSI transport is registered with the iSCSI subsystem, the transport's handle is available to unprivileged users via the sysfs file system, at /sys/class/iscsi_transport/$TRANSPORT_NAME/handle. When read, the show_transport_handle function (in drivers/scsi/scsi_transport_iscsi.c) is called, which leaks the handle. This handle is actually the pointer to an iscsi_transport struct in the kernel module's global variables.
Aliases
Aliases
CVE-2021-27363


To clipboard 

{
  "GSD": {
    "alias": "CVE-2021-27363",
    "description": "An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine the address of the iscsi_transport structure. When an iSCSI transport is registered with the iSCSI subsystem, the transport\u0027s handle is available to unprivileged users via the sysfs file system, at /sys/class/iscsi_transport/$TRANSPORT_NAME/handle. When read, the show_transport_handle function (in drivers/scsi/scsi_transport_iscsi.c) is called, which leaks the handle. This handle is actually the pointer to an iscsi_transport struct in the kernel module\u0027s global variables.",
    "id": "GSD-2021-27363",
    "references": [
      "https://www.suse.com/security/cve/CVE-2021-27363.html",
      "https://access.redhat.com/errata/RHSA-2021:1531",
      "https://access.redhat.com/errata/RHSA-2021:1376",
      "https://access.redhat.com/errata/RHSA-2021:1373",
      "https://access.redhat.com/errata/RHSA-2021:1289",
      "https://access.redhat.com/errata/RHSA-2021:1279",
      "https://access.redhat.com/errata/RHSA-2021:1272",
      "https://access.redhat.com/errata/RHSA-2021:1267",
      "https://access.redhat.com/errata/RHSA-2021:1171",
      "https://access.redhat.com/errata/RHSA-2021:1093",
      "https://access.redhat.com/errata/RHSA-2021:1081",
      "https://access.redhat.com/errata/RHSA-2021:1071",
      "https://access.redhat.com/errata/RHSA-2021:1070",
      "https://ubuntu.com/security/CVE-2021-27363",
      "https://advisories.mageia.org/CVE-2021-27363.html",
      "https://security.archlinux.org/CVE-2021-27363",
      "https://alas.aws.amazon.com/cve/html/CVE-2021-27363.html",
      "https://linux.oracle.com/cve/CVE-2021-27363.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
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      "id": "GSD-2021-27363",
      "modified": "2023-12-13T01:23:35.927186Z",
      "schema_version": "1.4.0"
    }
  },
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    "nvd.nist.gov": {
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      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 3.6,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "NONE",
            "vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:P",
            "version": "2.0"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 4.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "LOW",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "LOW",
            "baseScore": 4.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L",
            "version": "3.1"
          },
          "exploitabilityScore": 1.8,
          "impactScore": 2.5
        }
      },
      "lastModifiedDate": "2022-05-23T16:00Z",
      "publishedDate": "2021-03-07T04:15Z"
    }
  }
}


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