Vulnerability-Lookup

GHSA-4PM5-34CF-2V36

Vulnerability from github – Published: 2022-05-13 01:25 – Updated: 2022-05-13 01:25

Details

** DISPUTED ** Kernel Samepage Merging (KSM) in the Linux kernel 2.6.32 through 4.x does not prevent use of a write-timing side channel, which allows guest OS users to defeat the ASLR protection mechanism on other guest OS instances via a Cross-VM ASL INtrospection (CAIN) attack. NOTE: the vendor states "Basically if you care about this attack vector, disable deduplication." Share-until-written approaches for memory conservation among mutually untrusting tenants are inherently detectable for information disclosure, and can be classified as potentially misunderstood behaviors rather than vulnerabilities.

Severity ?

3.3 (Low)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2015-2877"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-200"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2017-03-03T11:59:00Z",
    "severity": "LOW"
  },
  "details": "** DISPUTED ** Kernel Samepage Merging (KSM) in the Linux kernel 2.6.32 through 4.x does not prevent use of a write-timing side channel, which allows guest OS users to defeat the ASLR protection mechanism on other guest OS instances via a Cross-VM ASL INtrospection (CAIN) attack.  NOTE: the vendor states \"Basically if you care about this attack vector, disable deduplication.\" Share-until-written approaches for memory conservation among mutually untrusting tenants are inherently detectable for information disclosure, and can be classified as potentially misunderstood behaviors rather than vulnerabilities.",
  "id": "GHSA-4pm5-34cf-2v36",
  "modified": "2022-05-13T01:25:53Z",
  "published": "2022-05-13T01:25:53Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2015-2877"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1252096"
    },
    {
      "type": "WEB",
      "url": "https://www.kb.cert.org/vuls/id/BGAR-A2CNKG"
    },
    {
      "type": "WEB",
      "url": "https://www.kb.cert.org/vuls/id/BLUU-9ZAHZH"
    },
    {
      "type": "WEB",
      "url": "https://www.usenix.org/system/files/conference/woot15/woot15-paper-barresi.pdf"
    },
    {
      "type": "WEB",
      "url": "http://www.antoniobarresi.com/files/cain_advisory.txt"
    },
    {
      "type": "WEB",
      "url": "http://www.kb.cert.org/vuls/id/935424"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/76256"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2015-2877 (GCVE-0-2015-2877)

Vulnerability from cvelistv5 – Published: 2017-03-03 11:00 – Updated: 2024-08-06 05:32 Disputed

Summary

Kernel Samepage Merging (KSM) in the Linux kernel 2.6.32 through 4.x does not prevent use of a write-timing side channel, which allows guest OS users to defeat the ASLR protection mechanism on other guest OS instances via a Cross-VM ASL INtrospection (CAIN) attack. NOTE: the vendor states "Basically if you care about this attack vector, disable deduplication." Share-until-written approaches for memory conservation among mutually untrusting tenants are inherently detectable for information disclosure, and can be classified as potentially misunderstood behaviors rather than vulnerabilities

Severity ?

No CVSS data available.

CWE

Assigner

certcc

References

URL

Tags

	http://www.securityfocus.com/bid/76256	vdb-entryx_refsource_BID
	http://www.kb.cert.org/vuls/id/935424	third-party-advisoryx_refsource_CERT-VN
	http://www.antoniobarresi.com/files/cain_advisory.txt	x_refsource_MISC
	https://www.kb.cert.org/vuls/id/BGAR-A2CNKG	x_refsource_MISC
	https://www.kb.cert.org/vuls/id/BLUU-9ZAHZH	x_refsource_MISC
	https://bugzilla.redhat.com/show_bug.cgi?id=1252096	x_refsource_MISC
	https://www.usenix.org/system/files/conference/wo…	x_refsource_MISC

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-06T05:32:20.252Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "76256",
            "tags": [
              "vdb-entry",
              "x_refsource_BID",
              "x_transferred"
            ],
            "url": "http://www.securityfocus.com/bid/76256"
          },
          {
            "name": "VU#935424",
            "tags": [
              "third-party-advisory",
              "x_refsource_CERT-VN",
              "x_transferred"
            ],
            "url": "http://www.kb.cert.org/vuls/id/935424"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://www.antoniobarresi.com/files/cain_advisory.txt"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.kb.cert.org/vuls/id/BGAR-A2CNKG"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.kb.cert.org/vuls/id/BLUU-9ZAHZH"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1252096"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.usenix.org/system/files/conference/woot15/woot15-paper-barresi.pdf"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "datePublic": "2015-07-30T00:00:00",
      "descriptions": [
        {
          "lang": "en",
          "value": "Kernel Samepage Merging (KSM) in the Linux kernel 2.6.32 through 4.x does not prevent use of a write-timing side channel, which allows guest OS users to defeat the ASLR protection mechanism on other guest OS instances via a Cross-VM ASL INtrospection (CAIN) attack.  NOTE: the vendor states \"Basically if you care about this attack vector, disable deduplication.\" Share-until-written approaches for memory conservation among mutually untrusting tenants are inherently detectable for information disclosure, and can be classified as potentially misunderstood behaviors rather than vulnerabilities"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2017-03-03T10:57:02",
        "orgId": "37e5125f-f79b-445b-8fad-9564f167944b",
        "shortName": "certcc"
      },
      "references": [
        {
          "name": "76256",
          "tags": [
            "vdb-entry",
            "x_refsource_BID"
          ],
          "url": "http://www.securityfocus.com/bid/76256"
        },
        {
          "name": "VU#935424",
          "tags": [
            "third-party-advisory",
            "x_refsource_CERT-VN"
          ],
          "url": "http://www.kb.cert.org/vuls/id/935424"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://www.antoniobarresi.com/files/cain_advisory.txt"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.kb.cert.org/vuls/id/BGAR-A2CNKG"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.kb.cert.org/vuls/id/BLUU-9ZAHZH"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1252096"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.usenix.org/system/files/conference/woot15/woot15-paper-barresi.pdf"
        }
      ],
      "tags": [
        "disputed"
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cert@cert.org",
          "ID": "CVE-2015-2877",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "** DISPUTED ** Kernel Samepage Merging (KSM) in the Linux kernel 2.6.32 through 4.x does not prevent use of a write-timing side channel, which allows guest OS users to defeat the ASLR protection mechanism on other guest OS instances via a Cross-VM ASL INtrospection (CAIN) attack.  NOTE: the vendor states \"Basically if you care about this attack vector, disable deduplication.\" Share-until-written approaches for memory conservation among mutually untrusting tenants are inherently detectable for information disclosure, and can be classified as potentially misunderstood behaviors rather than vulnerabilities."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "76256",
              "refsource": "BID",
              "url": "http://www.securityfocus.com/bid/76256"
            },
            {
              "name": "VU#935424",
              "refsource": "CERT-VN",
              "url": "http://www.kb.cert.org/vuls/id/935424"
            },
            {
              "name": "http://www.antoniobarresi.com/files/cain_advisory.txt",
              "refsource": "MISC",
              "url": "http://www.antoniobarresi.com/files/cain_advisory.txt"
            },
            {
              "name": "https://www.kb.cert.org/vuls/id/BGAR-A2CNKG",
              "refsource": "MISC",
              "url": "https://www.kb.cert.org/vuls/id/BGAR-A2CNKG"
            },
            {
              "name": "https://www.kb.cert.org/vuls/id/BLUU-9ZAHZH",
              "refsource": "MISC",
              "url": "https://www.kb.cert.org/vuls/id/BLUU-9ZAHZH"
            },
            {
              "name": "https://bugzilla.redhat.com/show_bug.cgi?id=1252096",
              "refsource": "MISC",
              "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1252096"
            },
            {
              "name": "https://www.usenix.org/system/files/conference/woot15/woot15-paper-barresi.pdf",
              "refsource": "MISC",
              "url": "https://www.usenix.org/system/files/conference/woot15/woot15-paper-barresi.pdf"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b",
    "assignerShortName": "certcc",
    "cveId": "CVE-2015-2877",
    "datePublished": "2017-03-03T11:00:00",
    "dateReserved": "2015-04-03T00:00:00",
    "dateUpdated": "2024-08-06T05:32:20.252Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

Action not permitted

GHSA-4PM5-34CF-2V36

CVE-2015-2877 (GCVE-0-2015-2877)

Tags

Sightings

Nomenclature