cve-2021-47132
Vulnerability from cvelistv5
Published
2024-03-15 20:14
Modified
2024-11-04 12:00
Severity ?
EPSS score ?
Summary
mptcp: fix sk_forward_memory corruption on retransmission
References
{ "containers": { "adp": [ { "metrics": [ { "other": { "content": { "id": "CVE-2021-47132", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "timestamp": "2024-03-18T15:54:25.829185Z", "version": "2.0.3" }, "type": "ssvc" } } ], "providerMetadata": { "dateUpdated": "2024-06-04T17:14:35.969Z", "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP" }, "title": "CISA ADP Vulnrichment" }, { "providerMetadata": { "dateUpdated": "2024-08-04T05:24:40.145Z", "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE" }, "references": [ { "tags": [ "x_transferred" ], "url": "https://git.kernel.org/stable/c/b9c78b1a95966a7bd2ddae05b73eafc0cda4fba3" }, { "tags": [ "x_transferred" ], "url": "https://git.kernel.org/stable/c/b5941f066b4ca331db225a976dae1d6ca8cf0ae3" } ], "title": "CVE Program Container" } ], "cna": { "affected": [ { "defaultStatus": "unaffected", "product": "Linux", "programFiles": [ "net/mptcp/protocol.c" ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [ { "lessThan": "b9c78b1a9596", "status": "affected", "version": "64b9cea7a0af", "versionType": "git" }, { "lessThan": "b5941f066b4c", "status": "affected", "version": "64b9cea7a0af", "versionType": "git" } ] }, { "defaultStatus": "affected", "product": "Linux", "programFiles": [ "net/mptcp/protocol.c" ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [ { "status": "affected", "version": "5.12" }, { "lessThan": "5.12", "status": "unaffected", "version": "0", "versionType": "semver" }, { "lessThanOrEqual": "5.12.*", "status": "unaffected", "version": "5.12.10", "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\nmptcp: fix sk_forward_memory corruption on retransmission\n\nMPTCP sk_forward_memory handling is a bit special, as such field\nis protected by the msk socket spin_lock, instead of the plain\nsocket lock.\n\nCurrently we have a code path updating such field without handling\nthe relevant lock:\n\n__mptcp_retrans() -\u003e __mptcp_clean_una_wakeup()\n\nSeveral helpers in __mptcp_clean_una_wakeup() will update\nsk_forward_alloc, possibly causing such field corruption, as reported\nby Matthieu.\n\nAddress the issue providing and using a new variant of blamed function\nwhich explicitly acquires the msk spin lock." } ], "providerMetadata": { "dateUpdated": "2024-11-04T12:00:05.791Z", "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux" }, "references": [ { "url": "https://git.kernel.org/stable/c/b9c78b1a95966a7bd2ddae05b73eafc0cda4fba3" }, { "url": "https://git.kernel.org/stable/c/b5941f066b4ca331db225a976dae1d6ca8cf0ae3" } ], "title": "mptcp: fix sk_forward_memory corruption on retransmission", "x_generator": { "engine": "bippy-9e1c9544281a" } } }, "cveMetadata": { "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "assignerShortName": "Linux", "cveId": "CVE-2021-47132", "datePublished": "2024-03-15T20:14:35.337Z", "dateReserved": "2024-03-04T18:12:48.840Z", "dateUpdated": "2024-11-04T12:00:05.791Z", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.1", "meta": { "nvd": "{\"cve\":{\"id\":\"CVE-2021-47132\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-03-15T21:15:07.690\",\"lastModified\":\"2024-03-17T22:38:29.433\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmptcp: fix sk_forward_memory corruption on retransmission\\n\\nMPTCP sk_forward_memory handling is a bit special, as such field\\nis protected by the msk socket spin_lock, instead of the plain\\nsocket lock.\\n\\nCurrently we have a code path updating such field without handling\\nthe relevant lock:\\n\\n__mptcp_retrans() -\u003e __mptcp_clean_una_wakeup()\\n\\nSeveral helpers in __mptcp_clean_una_wakeup() will update\\nsk_forward_alloc, possibly causing such field corruption, as reported\\nby Matthieu.\\n\\nAddress the issue providing and using a new variant of blamed function\\nwhich explicitly acquires the msk spin lock.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mptcp: corrige la corrupci\u00f3n de sk_forward_memory en la retransmisi\u00f3n El manejo de MPTCP sk_forward_memory es un poco especial, ya que dicho campo est\u00e1 protegido por el socket msk spin_lock, en lugar del bloqueo de socket simple. Actualmente tenemos una ruta de c\u00f3digo que actualiza dicho campo sin manejar el bloqueo relevante: __mptcp_retrans() -\u0026gt; __mptcp_clean_una_wakeup() Varios ayudantes en __mptcp_clean_una_wakeup() actualizar\u00e1n sk_forward_alloc, posiblemente causando dicha corrupci\u00f3n de campo, seg\u00fan lo informado por Matthieu. Solucione el problema proporcionando y utilizando una nueva variante de la funci\u00f3n culpada que adquiere expl\u00edcitamente el bloqueo de giro msk.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/b5941f066b4ca331db225a976dae1d6ca8cf0ae3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b9c78b1a95966a7bd2ddae05b73eafc0cda4fba3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}" } }
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Sightings
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Nomenclature
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