CVE-2021-4158

A NULL pointer dereference issue was found in the ACPI code of QEMU. A malicious, privileged user within the guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition.

CVSS v3.0 6.0 MEDIUM

6.0^/10

CVSS v3.0 : MEDIUM

Vector :

Exploitability : 1.5 / Impact : 4.0

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://bugzilla.redhat.com/show_bug.cgi?id=2035002	Issue Tracking Patch Third Party Advisory
https://gitlab.com/qemu-project/qemu/-/commit/9bd6565ccee68f72d5012e24646e12a1c662827e	Patch Third Party Advisory
https://access.redhat.com/security/cve/CVE-2021-4158	Third Party Advisory
https://gitlab.com/qemu-project/qemu/-/issues/770	Exploit Third Party Advisory
https://www.mail-archive.com/qemu-devel%40nongnu.org/msg857944.html

Advertisement

Configurations

Configuration 1 (hide)

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

Configuration 2 (hide)

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

Information

Published : 2022-08-24 09:15

Updated : 2023-02-12 15:43

NVD link : CVE-2021-4158

Mitre link : CVE-2021-4158

JSON object : View

CWE

CWE-476

NULL Pointer Dereference

Advertisement

Products Affected

redhat

enterprise_linux

qemu

qemu

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2035002", "name": "https://bugzilla.redhat.com/show_bug.cgi?id=2035002", "tags": ["Issue Tracking", "Patch", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://gitlab.com/qemu-project/qemu/-/commit/9bd6565ccee68f72d5012e24646e12a1c662827e", "name": "https://gitlab.com/qemu-project/qemu/-/commit/9bd6565ccee68f72d5012e24646e12a1c662827e", "tags": ["Patch", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://access.redhat.com/security/cve/CVE-2021-4158", "name": "https://access.redhat.com/security/cve/CVE-2021-4158", "tags": ["Third Party Advisory"], "refsource": "MISC"}, {"url": "https://gitlab.com/qemu-project/qemu/-/issues/770", "name": "https://gitlab.com/qemu-project/qemu/-/issues/770", "tags": ["Exploit", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://www.mail-archive.com/qemu-devel%40nongnu.org/msg857944.html", "name": "https://www.mail-archive.com/qemu-devel%40nongnu.org/msg857944.html", "tags": [], "refsource": "MISC"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "A NULL pointer dereference issue was found in the ACPI code of QEMU. A malicious, privileged user within the guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-476"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2021-4158", "ASSIGNER": "secalert@redhat.com"}}, "impact": {"baseMetricV3": {"cvssV3": {"scope": "CHANGED", "version": "3.1", "baseScore": 6.0, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "NONE"}, "impactScore": 4.0, "exploitabilityScore": 1.5}}, "publishedDate": "2022-08-24T16:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "7.0.0", "versionStartIncluding": "6.0.0"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2023-02-12T23:43Z"}