CVE-2021-20181
Vulnerability from cvelistv5
Published
2021-05-13 15:24
Modified
2024-08-03 17:30
Severity ?
EPSS score ?
Summary
A race condition flaw was found in the 9pfs server implementation of QEMU up to and including 5.2.0. This flaw allows a malicious 9p client to cause a use-after-free error, potentially escalating their privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity as well as system availability.
References
{ containers: { adp: [ { providerMetadata: { dateUpdated: "2024-08-03T17:30:07.767Z", orgId: "af854a3a-2127-422b-91ae-364da2661108", shortName: "CVE", }, references: [ { tags: [ "x_refsource_MISC", "x_transferred", ], url: "https://www.zerodayinitiative.com/advisories/ZDI-21-159/", }, { name: "[debian-lts-announce] 20210218 [SECURITY] [DLA 2560-1] qemu security update", tags: [ "mailing-list", "x_refsource_MLIST", "x_transferred", ], url: "https://lists.debian.org/debian-lts-announce/2021/02/msg00024.html", }, { tags: [ "x_refsource_MISC", "x_transferred", ], url: "https://bugzilla.redhat.com/show_bug.cgi?id=1927007", }, { tags: [ "x_refsource_CONFIRM", "x_transferred", ], url: "https://security.netapp.com/advisory/ntap-20210720-0009/", }, { name: "[debian-lts-announce] 20220905 [SECURITY] [DLA 3099-1] qemu security update", tags: [ "mailing-list", "x_refsource_MLIST", "x_transferred", ], url: "https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html", }, ], title: "CVE Program Container", }, ], cna: { affected: [ { product: "qemu", vendor: "n/a", versions: [ { status: "affected", version: "up to, including 5.2.0", }, ], }, ], descriptions: [ { lang: "en", value: "A race condition flaw was found in the 9pfs server implementation of QEMU up to and including 5.2.0. This flaw allows a malicious 9p client to cause a use-after-free error, potentially escalating their privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity as well as system availability.", }, ], problemTypes: [ { descriptions: [ { cweId: "CWE-367", description: "CWE-367->CWE-416", lang: "en", type: "CWE", }, ], }, ], providerMetadata: { dateUpdated: "2022-09-05T05:06:09", orgId: "53f830b8-0a3f-465b-8143-3b8a9948e749", shortName: "redhat", }, references: [ { tags: [ "x_refsource_MISC", ], url: "https://www.zerodayinitiative.com/advisories/ZDI-21-159/", }, { name: "[debian-lts-announce] 20210218 [SECURITY] [DLA 2560-1] qemu security update", tags: [ "mailing-list", "x_refsource_MLIST", ], url: "https://lists.debian.org/debian-lts-announce/2021/02/msg00024.html", }, { tags: [ "x_refsource_MISC", ], url: "https://bugzilla.redhat.com/show_bug.cgi?id=1927007", }, { tags: [ "x_refsource_CONFIRM", ], url: "https://security.netapp.com/advisory/ntap-20210720-0009/", }, { name: "[debian-lts-announce] 20220905 [SECURITY] [DLA 3099-1] qemu security update", tags: [ "mailing-list", "x_refsource_MLIST", ], url: "https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html", }, ], }, }, cveMetadata: { assignerOrgId: "53f830b8-0a3f-465b-8143-3b8a9948e749", assignerShortName: "redhat", cveId: "CVE-2021-20181", datePublished: "2021-05-13T15:24:15", dateReserved: "2020-12-17T00:00:00", dateUpdated: "2024-08-03T17:30:07.767Z", state: "PUBLISHED", }, dataType: "CVE_RECORD", dataVersion: "5.1", "vulnerability-lookup:meta": { nvd: "{\"cve\":{\"id\":\"CVE-2021-20181\",\"sourceIdentifier\":\"secalert@redhat.com\",\"published\":\"2021-05-13T16:15:07.653\",\"lastModified\":\"2024-11-21T05:46:04.983\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A race condition flaw was found in the 9pfs server implementation of QEMU up to and including 5.2.0. This flaw allows a malicious 9p client to cause a use-after-free error, potentially escalating their privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity as well as system availability.\"},{\"lang\":\"es\",\"value\":\"Se encontró un fallo de condición de carrera en la implementación del servidor 9pfs de QEMU versiones hasta 5.2.0 incluyéndola. Este fallo permite a un cliente 9p malicioso causar un error de uso de la memoria previamente liberada, escalando potencialmente sus privilegios en el sistema. La mayor amenaza de esta vulnerabilidad es la confidencialidad, la integridad así como la disponibilidad del sistema\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"HIGH\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":0.8,\"impactScore\":6.0}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:L/AC:M/Au:N/C:C/I:C/A:C\",\"baseScore\":6.9,\"accessVector\":\"LOCAL\",\"accessComplexity\":\"MEDIUM\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"COMPLETE\",\"integrityImpact\":\"COMPLETE\",\"availabilityImpact\":\"COMPLETE\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":3.4,\"impactScore\":10.0,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"secalert@redhat.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-367\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-362\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*\",\"versionEndIncluding\":\"5.2.0\",\"matchCriteriaId\":\"326C44E5-259C-47D1-B540-E153CD7C907C\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"DEECE5FC-CACF-4496-A3E7-164736409252\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"07B237A9-69A3-4A9C-9DA0-4E06BD37AE73\"}]}]}],\"references\":[{\"url\":\"https://bugzilla.redhat.com/show_bug.cgi?id=1927007\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Issue Tracking\",\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2021/02/msg00024.html\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://security.netapp.com/advisory/ntap-20210720-0009/\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.zerodayinitiative.com/advisories/ZDI-21-159/\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"https://bugzilla.redhat.com/show_bug.cgi?id=1927007\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Issue Tracking\",\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2021/02/msg00024.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://security.netapp.com/advisory/ntap-20210720-0009/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.zerodayinitiative.com/advisories/ZDI-21-159/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\",\"VDB Entry\"]}]}}", }, }
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Sightings
Author | Source | Type | Date |
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Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.