CVE-2018-1095 (GCVE-0-2018-1095)

Vulnerability from cvelistv5 – Published: 2018-04-02 03:00 – Updated: 2024-08-05 03:51
VLAI?
Summary
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.
Severity ?
No CVSS data available.
CWE
  • NULL pointer dereference
Assigner
References
Impacted products
Vendor Product Version
n/a Linux kernel through version 4.15 Affected: Linux kernel through version 4.15
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-05T03:51:48.616Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=ce3fd194fcc6fbdc00ce095a852f22df97baa401"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://openwall.com/lists/oss-security/2018/03/29/1"
          },
          {
            "name": "USN-3695-1",
            "tags": [
              "vendor-advisory",
              "x_refsource_UBUNTU",
              "x_transferred"
            ],
            "url": "https://usn.ubuntu.com/3695-1/"
          },
          {
            "name": "USN-3695-2",
            "tags": [
              "vendor-advisory",
              "x_refsource_UBUNTU",
              "x_transferred"
            ],
            "url": "https://usn.ubuntu.com/3695-2/"
          },
          {
            "name": "RHSA-2018:2948",
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT",
              "x_transferred"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2018:2948"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://bugzilla.kernel.org/show_bug.cgi?id=199185"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1560793"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Linux kernel through version 4.15",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "Linux kernel through version 4.15"
            }
          ]
        }
      ],
      "datePublic": "2018-04-01T00:00:00",
      "descriptions": [
        {
          "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."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "NULL pointer dereference",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2018-10-31T09:57:01",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=ce3fd194fcc6fbdc00ce095a852f22df97baa401"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://openwall.com/lists/oss-security/2018/03/29/1"
        },
        {
          "name": "USN-3695-1",
          "tags": [
            "vendor-advisory",
            "x_refsource_UBUNTU"
          ],
          "url": "https://usn.ubuntu.com/3695-1/"
        },
        {
          "name": "USN-3695-2",
          "tags": [
            "vendor-advisory",
            "x_refsource_UBUNTU"
          ],
          "url": "https://usn.ubuntu.com/3695-2/"
        },
        {
          "name": "RHSA-2018:2948",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2018:2948"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://bugzilla.kernel.org/show_bug.cgi?id=199185"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1560793"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2018-1095",
    "datePublished": "2018-04-02T03:00:00",
    "dateReserved": "2017-12-04T00:00:00",
    "dateUpdated": "2024-08-05T03:51:48.616Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "fkie_nvd": {
      "configurations": "[{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionEndIncluding\": \"4.15.15\", \"matchCriteriaId\": \"EA4F2AD9-993F-4246-B6F9-7723FF82AF6C\"}]}]}]",
      "descriptions": "[{\"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.\"}, {\"lang\": \"es\", \"value\": \"La funci\\u00f3n ext4_xattr_check_entries en fs/ext4/xattr.c en el kernel de Linux hasta la versi\\u00f3n 4.15.15 no valida correctamente los tama\\u00f1os de xattr, lo que provoca una malinterpretaci\\u00f3n de un tama\\u00f1o como un c\\u00f3digo de error y, en consecuencia, permite que los atacantes provoquen una denegaci\\u00f3n de servicio (desreferencia de puntero NULL en get_acl y cierre inesperado del sistema) mediante una imagen ext4 manipulada.\"}]",
      "id": "CVE-2018-1095",
      "lastModified": "2024-11-21T03:59:10.320",
      "metrics": "{\"cvssMetricV30\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.0\", \"vectorString\": \"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H\", \"baseScore\": 5.5, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"REQUIRED\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 1.8, \"impactScore\": 3.6}], \"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:N/AC:M/Au:N/C:N/I:N/A:C\", \"baseScore\": 7.1, \"accessVector\": \"NETWORK\", \"accessComplexity\": \"MEDIUM\", \"authentication\": \"NONE\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"COMPLETE\"}, \"baseSeverity\": \"HIGH\", \"exploitabilityScore\": 8.6, \"impactScore\": 6.9, \"acInsufInfo\": false, \"obtainAllPrivilege\": false, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": true}]}",
      "published": "2018-04-02T03:29:00.433",
      "references": "[{\"url\": \"http://openwall.com/lists/oss-security/2018/03/29/1\", \"source\": \"secalert@redhat.com\", \"tags\": [\"Mailing List\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2018:2948\", \"source\": \"secalert@redhat.com\"}, {\"url\": \"https://bugzilla.kernel.org/show_bug.cgi?id=199185\", \"source\": \"secalert@redhat.com\", \"tags\": [\"Exploit\", \"Issue Tracking\"]}, {\"url\": \"https://bugzilla.redhat.com/show_bug.cgi?id=1560793\", \"source\": \"secalert@redhat.com\", \"tags\": [\"Issue Tracking\"]}, {\"url\": \"https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=ce3fd194fcc6fbdc00ce095a852f22df97baa401\", \"source\": \"secalert@redhat.com\", \"tags\": [\"Patch\"]}, {\"url\": \"https://usn.ubuntu.com/3695-1/\", \"source\": \"secalert@redhat.com\"}, {\"url\": \"https://usn.ubuntu.com/3695-2/\", \"source\": \"secalert@redhat.com\"}, {\"url\": \"http://openwall.com/lists/oss-security/2018/03/29/1\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Mailing List\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2018:2948\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://bugzilla.kernel.org/show_bug.cgi?id=199185\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Exploit\", \"Issue Tracking\"]}, {\"url\": \"https://bugzilla.redhat.com/show_bug.cgi?id=1560793\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Issue Tracking\"]}, {\"url\": \"https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=ce3fd194fcc6fbdc00ce095a852f22df97baa401\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://usn.ubuntu.com/3695-1/\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://usn.ubuntu.com/3695-2/\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}]",
      "sourceIdentifier": "secalert@redhat.com",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-476\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2018-1095\",\"sourceIdentifier\":\"secalert@redhat.com\",\"published\":\"2018-04-02T03:29:00.433\",\"lastModified\":\"2024-11-21T03:59:10.320\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"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.\"},{\"lang\":\"es\",\"value\":\"La funci\u00f3n ext4_xattr_check_entries en fs/ext4/xattr.c en el kernel de Linux hasta la versi\u00f3n 4.15.15 no valida correctamente los tama\u00f1os de xattr, lo que provoca una malinterpretaci\u00f3n de un tama\u00f1o como un c\u00f3digo de error y, en consecuencia, permite que los atacantes provoquen una denegaci\u00f3n de servicio (desreferencia de puntero NULL en get_acl y cierre inesperado del sistema) mediante una imagen ext4 manipulada.\"}],\"metrics\":{\"cvssMetricV30\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.0\",\"vectorString\":\"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:M/Au:N/C:N/I:N/A:C\",\"baseScore\":7.1,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"MEDIUM\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"COMPLETE\"},\"baseSeverity\":\"HIGH\",\"exploitabilityScore\":8.6,\"impactScore\":6.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":true}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionEndIncluding\":\"4.15.15\",\"matchCriteriaId\":\"EA4F2AD9-993F-4246-B6F9-7723FF82AF6C\"}]}]}],\"references\":[{\"url\":\"http://openwall.com/lists/oss-security/2018/03/29/1\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Mailing List\"]},{\"url\":\"https://access.redhat.com/errata/RHSA-2018:2948\",\"source\":\"secalert@redhat.com\"},{\"url\":\"https://bugzilla.kernel.org/show_bug.cgi?id=199185\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Exploit\",\"Issue Tracking\"]},{\"url\":\"https://bugzilla.redhat.com/show_bug.cgi?id=1560793\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Issue Tracking\"]},{\"url\":\"https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=ce3fd194fcc6fbdc00ce095a852f22df97baa401\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Patch\"]},{\"url\":\"https://usn.ubuntu.com/3695-1/\",\"source\":\"secalert@redhat.com\"},{\"url\":\"https://usn.ubuntu.com/3695-2/\",\"source\":\"secalert@redhat.com\"},{\"url\":\"http://openwall.com/lists/oss-security/2018/03/29/1\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\"]},{\"url\":\"https://access.redhat.com/errata/RHSA-2018:2948\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://bugzilla.kernel.org/show_bug.cgi?id=199185\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Issue Tracking\"]},{\"url\":\"https://bugzilla.redhat.com/show_bug.cgi?id=1560793\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Issue Tracking\"]},{\"url\":\"https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=ce3fd194fcc6fbdc00ce095a852f22df97baa401\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://usn.ubuntu.com/3695-1/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://usn.ubuntu.com/3695-2/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.