CVE-2024-0564

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2024-0564	Third Party Advisory
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1680513	Exploit Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2258514	Issue Tracking
https://link.springer.com/conference/wisa	Not Applicable
https://wisa.or.kr/accepted	Not Applicable

Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:9.0:::::::*

History

No history.

Information

Published : 2024-01-30 15:15

Updated : 2024-02-08 16:36

NVD link : CVE-2024-0564

Mitre link : CVE-2024-0564

CVE.ORG link : CVE-2024-0564

JSON object : View

Products Affected

redhat

enterprise_linux

linux

linux_kernel

CWE

CWE-203

Observable Discrepancy

{"id": "CVE-2024-0564", "cveTags": [], "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"}