{"id":"CVE-2015-2877","state":"PUBLISHED","title":"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 ","description":"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","publishedAt":"2017-03-03T11:00:00.000Z","updatedAt":"2024-08-06T05:32:20.252Z","severity":null,"assigner":"certcc","products":["n/a n/a"],"affected":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}],"references":["http://www.securityfocus.com/bid/76256","http://www.kb.cert.org/vuls/id/935424","http://www.antoniobarresi.com/files/cain_advisory.txt","https://www.kb.cert.org/vuls/id/BGAR-A2CNKG","https://www.kb.cert.org/vuls/id/BLUU-9ZAHZH","https://bugzilla.redhat.com/show_bug.cgi?id=1252096","https://www.usenix.org/system/files/conference/woot15/woot15-paper-barresi.pdf"],"weaknesses":[],"ingestedAt":"2026-10-29T19:42:02.420Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2015/2xxx/CVE-2015-2877.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2015-2877","state":"PUBLISHED","datePublished":"2017-03-03T11:00:00.000Z","dateUpdated":"2024-08-06T05:32:20.252Z","assignerShortName":"certcc","assignerOrgId":"37e5125f-f79b-445b-8fad-9564f167944b","dateReserved":"2015-04-03T00:00:00.000Z"},"containers":{"cna":{"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"}],"affected":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}],"references":[{"url":"http://www.securityfocus.com/bid/76256","name":"76256","tags":["vdb-entry","x_refsource_BID"]},{"url":"http://www.kb.cert.org/vuls/id/935424","name":"VU#935424","tags":["third-party-advisory","x_refsource_CERT-VN"]},{"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":["x_refsource_MISC"]}],"problemTypes":[{"descriptions":[{"description":"n/a","lang":"en","type":"text"}]}],"providerMetadata":{"shortName":"certcc","dateUpdated":"2017-03-03T10:57:02.000Z","orgId":"37e5125f-f79b-445b-8fad-9564f167944b"},"datePublic":"2015-07-30T00:00:00.000Z","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"}]}}},"adp":[{"title":"CVE Program Container","references":[{"url":"http://www.securityfocus.com/bid/76256","name":"76256","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"http://www.kb.cert.org/vuls/id/935424","name":"VU#935424","tags":["third-party-advisory","x_refsource_CERT-VN","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","tags":["x_refsource_MISC","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-06T05:32:20.252Z"}}]}}}