CVE-2015-2877

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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"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-06T05:32:20.252Z"}, "title": "CVE Program Container", "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"}]}]}, "cveMetadata": {"assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b", "assignerShortName": "certcc", "cveId": "CVE-2015-2877", "datePublished": "2017-03-03T11:00:00.000Z", "dateReserved": "2015-04-03T00:00:00.000Z", "dateUpdated": "2024-08-06T05:32:20.252Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cret@cert.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "85A3B15D-C690-40D1-A2CE-3E2E5035DA99", "versionEndIncluding": "4.20.15", "versionStartIncluding": "2.6.32", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:redhat:enterprise_linux:4.0:*:*:*:*:*:*:*", "matchCriteriaId": "6172AF57-B26D-45F8-BE3A-F75ABDF28F49", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:*", "matchCriteriaId": "1D8B549B-E57B-4DFE-8A13-CAB06B5356B3", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*", "matchCriteriaId": "2F6AB192-9D7D-4A9A-8995-E53A9DE9EAFC", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*", "matchCriteriaId": "142AD0DD-4CF3-4D74-9442-459CE3347E3A", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [{"sourceIdentifier": "cret@cert.org", "tags": ["disputed"]}], "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"}, {"lang": "es", "value": "** DISPUTADA ** Kernel Samepage Merging (KSM) en el kernel de Linux 2.6.32 hasta la versi\u00f3n 4.x no previene el uso de un canal lateral de sincronizaci\u00f3n de escritura, lo que permite a usuarios invitados del SO derrotar el mecanismo de protecci\u00f3n de ASLR en otras instancias invitadas del SO a trav\u00e9s de un ataque Cross-VM ASL INtrospection (CAIN). NOTA: el vendedor afirma \"B\u00e1sicamente si te preocupa este vector de ataque, inhabilita la deduplicaci\u00f3n\". Enfoques de compartir hasta escritura para conservaci\u00f3n de memoria entre inquilinos mutuamente desconfiados son inherentemente detectables para divulgaci\u00f3n de informaci\u00f3n y pueden clasificarse como comportamientos potencialmente malinterpretados en lugar de vulnerabilidades."}], "id": "CVE-2015-2877", "lastModified": "2026-06-17T00:24:54.560", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 2.1, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 3.3, "baseSeverity": "LOW", "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:N", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2017-03-03T11:59:00.147", "references": [{"source": "cret@cert.org", "tags": ["Technical Description", "Third Party Advisory"], "url": "http://www.antoniobarresi.com/files/cain_advisory.txt"}, {"source": "cret@cert.org", "tags": ["Third Party Advisory", "US Government Resource"], "url": "http://www.kb.cert.org/vuls/id/935424"}, {"source": "cret@cert.org", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/76256"}, {"source": "cret@cert.org", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1252096"}, {"source": "cret@cert.org", "tags": ["Third Party Advisory", "US Government Resource"], "url": "https://www.kb.cert.org/vuls/id/BGAR-A2CNKG"}, {"source": "cret@cert.org", "tags": ["Third Party Advisory", "US Government Resource"], "url": "https://www.kb.cert.org/vuls/id/BLUU-9ZAHZH"}, {"source": "cret@cert.org", "tags": ["Technical Description", "Third Party Advisory"], "url": "https://www.usenix.org/system/files/conference/woot15/woot15-paper-barresi.pdf"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Technical Description", "Third Party Advisory"], "url": "http://www.antoniobarresi.com/files/cain_advisory.txt"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "US Government Resource"], "url": "http://www.kb.cert.org/vuls/id/935424"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/76256"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1252096"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "US Government Resource"], "url": "https://www.kb.cert.org/vuls/id/BGAR-A2CNKG"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "US Government Resource"], "url": "https://www.kb.cert.org/vuls/id/BLUU-9ZAHZH"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Technical Description", "Third Party Advisory"], "url": "https://www.usenix.org/system/files/conference/woot15/woot15-paper-barresi.pdf"}], "sourceIdentifier": "cret@cert.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-200"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "Kernel: Cross-VM ASL INtrospection (CAIN)", "id": "1252096", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1252096"}, "csaw": false, "cvss": {"cvss_base_score": "2.1", "cvss_scoring_vector": "AV:L/AC:L/Au:N/C:P/I:N/A:N", "status": "draft"}, "details": ["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"], "name": "CVE-2015-2877", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:4", "fix_state": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 4"}, {"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}], "public_date": "2015-08-05T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2015-2877\nhttps://nvd.nist.gov/vuln/detail/CVE-2015-2877\nhttp://www.antoniobarresi.com/files/cain_advisory.txt"], "statement": "This issue affects the versions of the Linux Kernel as shipped with Red Hat Enterprise Linux 4, 5, 6 and 7. Red Hat Product Security has rated this issue as having Low security impact. Additionally a workaround is available. A future update may address this issue. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.", "threat_severity": "Low"}

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