gsd-2018-1095
Vulnerability from gsd
Modified
2023-12-13 01:22
Details
The ext4_xattr_check_entries function in fs/ext4/xattr.c in the Linux kernel through 4.15.15 does not properly validate xattr sizes, which causes misinterpretation of a size as an error code, and consequently allows attackers to cause a denial of service (get_acl NULL pointer dereference and system crash) via a crafted ext4 image.
Aliases
Aliases
CVE-2018-1095


To clipboard 

{
  "GSD": {
    "alias": "CVE-2018-1095",
    "description": "The ext4_xattr_check_entries function in fs/ext4/xattr.c in the Linux kernel through 4.15.15 does not properly validate xattr sizes, which causes misinterpretation of a size as an error code, and consequently allows attackers to cause a denial of service (get_acl NULL pointer dereference and system crash) via a crafted ext4 image.",
    "id": "GSD-2018-1095",
    "references": [
      "https://www.suse.com/security/cve/CVE-2018-1095.html",
      "https://access.redhat.com/errata/RHSA-2018:2948",
      "https://ubuntu.com/security/CVE-2018-1095",
      "https://advisories.mageia.org/CVE-2018-1095.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2018-1095"
      ],
      "details": "The ext4_xattr_check_entries function in fs/ext4/xattr.c in the Linux kernel through 4.15.15 does not properly validate xattr sizes, which causes misinterpretation of a size as an error code, and consequently allows attackers to cause a denial of service (get_acl NULL pointer dereference and system crash) via a crafted ext4 image.",
      "id": "GSD-2018-1095",
      "modified": "2023-12-13T01:22:37.155729Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "secalert@redhat.com",
        "ID": "CVE-2018-1095",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Linux kernel through version 4.15",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "=",
                          "version_value": "Linux kernel through version 4.15"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "n/a"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "The ext4_xattr_check_entries function in fs/ext4/xattr.c in the Linux kernel through 4.15.15 does not properly validate xattr sizes, which causes misinterpretation of a size as an error code, and consequently allows attackers to cause a denial of service (get_acl NULL pointer dereference and system crash) via a crafted ext4 image."
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "NULL pointer dereference"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://access.redhat.com/errata/RHSA-2018:2948",
            "refsource": "MISC",
            "url": "https://access.redhat.com/errata/RHSA-2018:2948"
          },
          {
            "name": "http://openwall.com/lists/oss-security/2018/03/29/1",
            "refsource": "MISC",
            "url": "http://openwall.com/lists/oss-security/2018/03/29/1"
          },
          {
            "name": "https://usn.ubuntu.com/3695-1/",
            "refsource": "MISC",
            "url": "https://usn.ubuntu.com/3695-1/"
          },
          {
            "name": "https://usn.ubuntu.com/3695-2/",
            "refsource": "MISC",
            "url": "https://usn.ubuntu.com/3695-2/"
          },
          {
            "name": "https://bugzilla.kernel.org/show_bug.cgi?id=199185",
            "refsource": "MISC",
            "url": "https://bugzilla.kernel.org/show_bug.cgi?id=199185"
          },
          {
            "name": "https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=ce3fd194fcc6fbdc00ce095a852f22df97baa401",
            "refsource": "MISC",
            "url": "https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=ce3fd194fcc6fbdc00ce095a852f22df97baa401"
          },
          {
            "name": "https://bugzilla.redhat.com/show_bug.cgi?id=1560793",
            "refsource": "MISC",
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1560793"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndIncluding": "4.15.15",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "secalert@redhat.com",
          "ID": "CVE-2018-1095"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "The ext4_xattr_check_entries function in fs/ext4/xattr.c in the Linux kernel through 4.15.15 does not properly validate xattr sizes, which causes misinterpretation of a size as an error code, and consequently allows attackers to cause a denial of service (get_acl NULL pointer dereference and system crash) via a crafted ext4 image."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-476"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=ce3fd194fcc6fbdc00ce095a852f22df97baa401",
              "refsource": "MISC",
              "tags": [
                "Patch"
              ],
              "url": "https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=ce3fd194fcc6fbdc00ce095a852f22df97baa401"
            },
            {
              "name": "https://bugzilla.redhat.com/show_bug.cgi?id=1560793",
              "refsource": "MISC",
              "tags": [
                "Issue Tracking"
              ],
              "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1560793"
            },
            {
              "name": "https://bugzilla.kernel.org/show_bug.cgi?id=199185",
              "refsource": "MISC",
              "tags": [
                "Exploit",
                "Issue Tracking"
              ],
              "url": "https://bugzilla.kernel.org/show_bug.cgi?id=199185"
            },
            {
              "name": "http://openwall.com/lists/oss-security/2018/03/29/1",
              "refsource": "MISC",
              "tags": [
                "Mailing List"
              ],
              "url": "http://openwall.com/lists/oss-security/2018/03/29/1"
            },
            {
              "name": "USN-3695-2",
              "refsource": "UBUNTU",
              "tags": [],
              "url": "https://usn.ubuntu.com/3695-2/"
            },
            {
              "name": "USN-3695-1",
              "refsource": "UBUNTU",
              "tags": [],
              "url": "https://usn.ubuntu.com/3695-1/"
            },
            {
              "name": "RHSA-2018:2948",
              "refsource": "REDHAT",
              "tags": [],
              "url": "https://access.redhat.com/errata/RHSA-2018:2948"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "cvssV2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "COMPLETE",
            "baseScore": 7.1,
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:C",
            "version": "2.0"
          },
          "exploitabilityScore": 8.6,
          "impactScore": 6.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "HIGH",
          "userInteractionRequired": true
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
            "version": "3.0"
          },
          "exploitabilityScore": 1.8,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2023-02-13T04:53Z",
      "publishedDate": "2018-04-02T03:29Z"
    }
  }
}


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