CVE-2024-0564

{"id": "CVE-2024-0564", "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 2.8}, {"type": "Secondary", "source": "secalert@redhat.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 1.6}]}, "published": "2024-01-30T15:15:08.687", "references": [{"url": "https://access.redhat.com/security/cve/CVE-2024-0564", "tags": ["Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1680513", "tags": ["Exploit", "Issue Tracking"], "source": "secalert@redhat.com"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2258514", "tags": ["Issue Tracking"], "source": "secalert@redhat.com"}, {"url": "https://link.springer.com/conference/wisa", "tags": ["Not Applicable"], "source": "secalert@redhat.com"}, {"url": "https://wisa.or.kr/accepted", "tags": ["Not Applicable"], "source": "secalert@redhat.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-203"}]}], "descriptions": [{"lang": "en", "value": "A flaw was found in the Linux kernel's memory deduplication mechanism. The max page sharing of Kernel Samepage Merging (KSM), added in Linux kernel version 4.4.0-96.119, can create a side channel. When the attacker and the victim share the same host and the default setting of KSM is \"max page sharing=256\", it is possible for the attacker to time the unmap to merge with the victim's page. The unmapping time depends on whether it merges with the victim's page and additional physical pages are created beyond the KSM's \"max page share\". Through these operations, the attacker can leak the victim's page."}, {"lang": "es", "value": "Se encontr\u00f3 un fallo en el mecanismo de deduplicaci\u00f3n de memoria del kernel de Linux. El uso compartido m\u00e1ximo de p\u00e1ginas de Kernel Samepage Merging (KSM), agregado en la versi\u00f3n 4.4.0-96.119 del kernel de Linux, puede crear un canal lateral. Cuando el atacante y la v\u00edctima comparten el mismo host y la configuraci\u00f3n predeterminada de KSM es \"max page sharing=256\", es posible que el atacante programe la desasignaci\u00f3n para fusionarse con la p\u00e1gina de la v\u00edctima. El tiempo de desasignaci\u00f3n depende de si se fusiona con la p\u00e1gina de la v\u00edctima y si se crean p\u00e1ginas f\u00edsicas adicionales m\u00e1s all\u00e1 del \"max page share\" de KSM. Mediante estas operaciones, el atacante puede filtrar la p\u00e1gina de la v\u00edctima."}], "lastModified": "2024-02-08T16:36:48.837", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "13C802F5-27EF-43DE-AD8A-2AEAB52A9CCB", "versionEndIncluding": "5.15.0-58", "versionStartIncluding": "4.4.0-96.119"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F4CFF558-3C47-480D-A2F0-BABF26042943"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7F6FB57C-2BC7-487C-96DD-132683AEB35D"}], "operator": "OR"}]}], "sourceIdentifier": "secalert@redhat.com"}