CVE-2020-35506

A use-after-free vulnerability was found in the am53c974 SCSI host bus adapter emulation of QEMU in versions before 6.0.0 during the handling of the 'Information Transfer' command (CMD_TI). This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service or potential code execution with the privileges of the QEMU process.

CVSS v3 6.7 MEDIUM
CVSS v2.0 4.6 MEDIUM

6.7^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 0.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

4.6^/10

CVSS v2.0 : MEDIUM

Vector : AV:L/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 3.9 / Impact : 6.4

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
http://www.openwall.com/lists/oss-security/2021/04/16/3	Mailing List Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1909996	Issue Tracking Third Party Advisory
https://security.gentoo.org/glsa/202208-27	Third Party Advisory
https://security.netapp.com/advisory/ntap-20210713-0006/	Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/04/16/3	Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/04/16/3	Mailing List Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1909996	Issue Tracking Third Party Advisory
https://security.gentoo.org/glsa/202208-27	Third Party Advisory
https://security.netapp.com/advisory/ntap-20210713-0006/	Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/04/16/3	Mailing List Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2021-05-28 11:15

Updated : 2024-11-21 05:27

NVD link : CVE-2020-35506

Mitre link : CVE-2020-35506

CVE.ORG link : CVE-2020-35506

JSON object : View

Products Affected

qemu

qemu

CWE

CWE-416

Use After Free

{"id": "CVE-2020-35506", "cveTags": [], "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 4.6, "accessVector": "LOCAL", "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 6.4, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 3.9, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.7, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 0.8}]}, "published": "2021-05-28T11:15:07.830", "references": [{"url": "http://www.openwall.com/lists/oss-security/2021/04/16/3", "tags": ["Mailing List", "Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1909996", "tags": ["Issue Tracking", "Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "https://security.gentoo.org/glsa/202208-27", "tags": ["Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "https://security.netapp.com/advisory/ntap-20210713-0006/", "tags": ["Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "https://www.openwall.com/lists/oss-security/2021/04/16/3", "tags": ["Mailing List", "Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "http://www.openwall.com/lists/oss-security/2021/04/16/3", "tags": ["Mailing List", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1909996", "tags": ["Issue Tracking", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://security.gentoo.org/glsa/202208-27", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://security.netapp.com/advisory/ntap-20210713-0006/", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.openwall.com/lists/oss-security/2021/04/16/3", "tags": ["Mailing List", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "secalert@redhat.com", "description": [{"lang": "en", "value": "CWE-416"}]}, {"type": "Secondary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "A use-after-free vulnerability was found in the am53c974 SCSI host bus adapter emulation of QEMU in versions before 6.0.0 during the handling of the 'Information Transfer' command (CMD_TI). This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service or potential code execution with the privileges of the QEMU process."}, {"lang": "es", "value": "Se encontr\u00f3 una vulnerabilidad de uso de memoria previamente liberada en la emulaci\u00f3n del adaptador bus de host SCSI am53c974 de QEMU en versiones anteriores a 6.0.0, durante el manejo del comando \"Information Transfer\" (CMD_TI). Este fallo permite a un usuario invitado privilegiado bloquear el proceso QEMU en el host, resultando en una denegaci\u00f3n de servicio o una posible ejecuci\u00f3n de c\u00f3digo con los privilegios del proceso QEMU"}], "lastModified": "2024-11-21T05:27:27.137", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CD1BE043-9A83-4615-86A8-EDD3C2192A22", "versionEndExcluding": "6.0.0"}], "operator": "OR"}]}], "sourceIdentifier": "secalert@redhat.com"}