cve-2021-46952
Vulnerability from cvelistv5
Published
2024-02-27 18:40
Modified
2024-11-04 11:56
Severity ?
EPSS score ?
Summary
NFS: fs_context: validate UDP retrans to prevent shift out-of-bounds
References
{ "containers": { "adp": [ { "metrics": [ { "other": { "content": { "id": "CVE-2021-46952", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "timestamp": "2024-02-27T20:13:18.077870Z", "version": "2.0.3" }, "type": "ssvc" } } ], "providerMetadata": { "dateUpdated": "2024-07-05T17:22:02.950Z", "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP" }, "title": "CISA ADP Vulnrichment" }, { "providerMetadata": { "dateUpdated": "2024-08-04T05:17:43.053Z", "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE" }, "references": [ { "tags": [ "x_transferred" ], "url": "https://git.kernel.org/stable/c/96fa26b74cdcf9f5c98996bf36bec9fb5b19ffe2" }, { "tags": [ "x_transferred" ], "url": "https://git.kernel.org/stable/c/2f3380121d49e829fb73ba86240c181bc32ad897" }, { "tags": [ "x_transferred" ], "url": "https://git.kernel.org/stable/c/3d0163821c035040a46d816a42c0780f0f0a30a8" }, { "tags": [ "x_transferred" ], "url": "https://git.kernel.org/stable/c/c09f11ef35955785f92369e25819bf0629df2e59" } ], "title": "CVE Program Container" } ], "cna": { "affected": [ { "defaultStatus": "unaffected", "product": "Linux", "programFiles": [ "fs/nfs/fs_context.c" ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [ { "lessThan": "96fa26b74cdc", "status": "affected", "version": "9954bf92c0cd", "versionType": "git" }, { "lessThan": "2f3380121d49", "status": "affected", "version": "9954bf92c0cd", "versionType": "git" }, { "lessThan": "3d0163821c03", "status": "affected", "version": "9954bf92c0cd", "versionType": "git" }, { "lessThan": "c09f11ef3595", "status": "affected", "version": "9954bf92c0cd", "versionType": "git" } ] }, { "defaultStatus": "affected", "product": "Linux", "programFiles": [ "fs/nfs/fs_context.c" ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [ { "status": "affected", "version": "5.6" }, { "lessThan": "5.6", "status": "unaffected", "version": "0", "versionType": "semver" }, { "lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.36", "versionType": "semver" }, { "lessThanOrEqual": "5.11.*", "status": "unaffected", "version": "5.11.20", "versionType": "semver" }, { "lessThanOrEqual": "5.12.*", "status": "unaffected", "version": "5.12.3", "versionType": "semver" }, { "lessThanOrEqual": "*", "status": "unaffected", "version": "5.13", "versionType": "original_commit_for_fix" } ] } ], "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFS: fs_context: validate UDP retrans to prevent shift out-of-bounds\n\nFix shift out-of-bounds in xprt_calc_majortimeo(). This is caused\nby a garbage timeout (retrans) mount option being passed to nfs mount,\nin this case from syzkaller.\n\nIf the protocol is XPRT_TRANSPORT_UDP, then \u0027retrans\u0027 is a shift\nvalue for a 64-bit long integer, so \u0027retrans\u0027 cannot be \u003e= 64.\nIf it is \u003e= 64, fail the mount and return an error." } ], "providerMetadata": { "dateUpdated": "2024-11-04T11:56:32.243Z", "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux" }, "references": [ { "url": "https://git.kernel.org/stable/c/96fa26b74cdcf9f5c98996bf36bec9fb5b19ffe2" }, { "url": "https://git.kernel.org/stable/c/2f3380121d49e829fb73ba86240c181bc32ad897" }, { "url": "https://git.kernel.org/stable/c/3d0163821c035040a46d816a42c0780f0f0a30a8" }, { "url": "https://git.kernel.org/stable/c/c09f11ef35955785f92369e25819bf0629df2e59" } ], "title": "NFS: fs_context: validate UDP retrans to prevent shift out-of-bounds", "x_generator": { "engine": "bippy-9e1c9544281a" } } }, "cveMetadata": { "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "assignerShortName": "Linux", "cveId": "CVE-2021-46952", "datePublished": "2024-02-27T18:40:35.343Z", "dateReserved": "2024-02-25T13:45:52.722Z", "dateUpdated": "2024-11-04T11:56:32.243Z", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.1", "meta": { "nvd": "{\"cve\":{\"id\":\"CVE-2021-46952\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-02-27T19:04:06.517\",\"lastModified\":\"2024-04-10T20:15:42.153\",\"vulnStatus\":\"Analyzed\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nNFS: fs_context: validate UDP retrans to prevent shift out-of-bounds\\n\\nFix shift out-of-bounds in xprt_calc_majortimeo(). This is caused\\nby a garbage timeout (retrans) mount option being passed to nfs mount,\\nin this case from syzkaller.\\n\\nIf the protocol is XPRT_TRANSPORT_UDP, then \u0027retrans\u0027 is a shift\\nvalue for a 64-bit long integer, so \u0027retrans\u0027 cannot be \u003e= 64.\\nIf it is \u003e= 64, fail the mount and return an error.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: NFS: fs_context: valida las retransmisiones UDP para evitar cambios fuera de los l\u00edmites. Corrige cambios fuera de los l\u00edmites en xprt_calc_majortimeo(). Esto se debe a que se pasa una opci\u00f3n de montaje de tiempo de espera de basura (retransmisi\u00f3n) al montaje nfs, en este caso desde syzkaller. Si el protocolo es XPRT_TRANSPORT_UDP, entonces \u0027retrans\u0027 es un valor de desplazamiento para un entero largo de 64 bits, por lo que \u0027retrans\u0027 no puede ser \u0026gt;= 64. Si es \u0026gt;= 64, falla el montaje y devuelve un error.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\",\"baseScore\":7.1,\"baseSeverity\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.2}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-125\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.6.0\",\"versionEndExcluding\":\"5.10.36\",\"matchCriteriaId\":\"9F676E27-91BA-4675-B518-89C5729CC97C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11.0\",\"versionEndExcluding\":\"5.11.20\",\"matchCriteriaId\":\"EFB425F0-C28C-4B44-8B4C-AD512AA832DE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.12.0\",\"versionEndExcluding\":\"5.12.3\",\"matchCriteriaId\":\"C3814FA3-8141-4313-A852-8C4212BE12AD\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2f3380121d49e829fb73ba86240c181bc32ad897\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3d0163821c035040a46d816a42c0780f0f0a30a8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/96fa26b74cdcf9f5c98996bf36bec9fb5b19ffe2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c09f11ef35955785f92369e25819bf0629df2e59\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}" } }
Loading...
Loading...
Sightings
Author | Source | Type | Date |
---|
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.