CVE-2021-47334 (GCVE-0-2021-47334)
Vulnerability from cvelistv5
Published
2024-05-21 14:35
Modified
2025-05-04 07:08
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: misc/libmasm/module: Fix two use after free in ibmasm_init_one In ibmasm_init_one, it calls ibmasm_init_remote_input_dev(). Inside ibmasm_init_remote_input_dev, mouse_dev and keybd_dev are allocated by input_allocate_device(), and assigned to sp->remote.mouse_dev and sp->remote.keybd_dev respectively. In the err_free_devices error branch of ibmasm_init_one, mouse_dev and keybd_dev are freed by input_free_device(), and return error. Then the execution runs into error_send_message error branch of ibmasm_init_one, where ibmasm_free_remote_input_dev(sp) is called to unregister the freed sp->remote.mouse_dev and sp->remote.keybd_dev. My patch add a "error_init_remote" label to handle the error of ibmasm_init_remote_input_dev(), to avoid the uaf bugs.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1512e7dc5eb08b7d92a12e2bfcd9cb8c4a1ec069Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/29ba8e2ba89ee2862a26d91204dd5fe77ceee25aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/38660031e80eaa6cc9370b031c180612f414b00dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/481a76d4749ee3a27f902ba213fdcbb4bb39720ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5b06ca113bf197aab2ab61288f42506e0049fbabPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7272b591c4cb9327c43443f67b8fbae7657dd9aePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a7268e8a227d5a4f0bd1584f556246b0224ab274Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b9c87ce3bc6331f82811a8cf8e930423c22523a3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ef1067d2baa847d53c9988510d99fb494de4d12cPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/1512e7dc5eb08b7d92a12e2bfcd9cb8c4a1ec069Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/29ba8e2ba89ee2862a26d91204dd5fe77ceee25aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/38660031e80eaa6cc9370b031c180612f414b00dPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/481a76d4749ee3a27f902ba213fdcbb4bb39720ePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/5b06ca113bf197aab2ab61288f42506e0049fbabPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/7272b591c4cb9327c43443f67b8fbae7657dd9aePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/a7268e8a227d5a4f0bd1584f556246b0224ab274Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b9c87ce3bc6331f82811a8cf8e930423c22523a3Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ef1067d2baa847d53c9988510d99fb494de4d12cPatch
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47334\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-21T15:15:20.273\",\"lastModified\":\"2024-12-26T19:25:16.993\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmisc/libmasm/module: Fix two use after free in ibmasm_init_one\\n\\nIn ibmasm_init_one, it calls ibmasm_init_remote_input_dev().\\nInside ibmasm_init_remote_input_dev, mouse_dev and keybd_dev are\\nallocated by input_allocate_device(), and assigned to\\nsp-\u003eremote.mouse_dev and sp-\u003eremote.keybd_dev respectively.\\n\\nIn the err_free_devices error branch of ibmasm_init_one,\\nmouse_dev and keybd_dev are freed by input_free_device(), and return\\nerror. Then the execution runs into error_send_message error branch\\nof ibmasm_init_one, where ibmasm_free_remote_input_dev(sp) is called\\nto unregister the freed sp-\u003eremote.mouse_dev and sp-\u003eremote.keybd_dev.\\n\\nMy patch add a \\\"error_init_remote\\\" label to handle the error of\\nibmasm_init_remote_input_dev(), to avoid the uaf bugs.\"},{\"lang\":\"es\",\"value\":\" En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: misc/libmasm/module: corrige dos use after free en ibmasm_init_one. En ibmasm_init_one, llama a ibmasm_init_remote_input_dev(). Dentro de ibmasm_init_remote_input_dev, mouse_dev y keybd_dev son asignados por input_allocate_device() y asignados a sp-\u0026gt;remote.mouse_dev y sp-\u0026gt;remote.keybd_dev respectivamente. En la rama de error err_free_devices de ibmasm_init_one, mouse_dev y keybd_dev se liberan mediante input_free_device() y devuelven un error. Luego, la ejecuci\u00f3n se ejecuta en la rama de error error_send_message de ibmasm_init_one, donde se llama a ibmasm_free_remote_input_dev(sp) para cancelar el registro de sp-\u0026gt;remote.mouse_dev y sp-\u0026gt;remote.keybd_dev liberados. Mi parche agrega una etiqueta \\\"error_init_remote\\\" para manejar el error de ibmasm_init_remote_input_dev(), para evitar los errores de uaf.\"}],\"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:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"4.4.276\",\"matchCriteriaId\":\"10282F37-B17F-4974-967E-FCD5ABC9AB8E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.5\",\"versionEndExcluding\":\"4.9.276\",\"matchCriteriaId\":\"C79FFC06-9530-4CD7-B651-01D786CC925E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.10\",\"versionEndExcluding\":\"4.14.240\",\"matchCriteriaId\":\"FB359B2E-773D-4D52-9915-E07A47ABE72B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.15\",\"versionEndExcluding\":\"4.19.198\",\"matchCriteriaId\":\"B93AEDB9-C52B-4222-8F9A-882DAD9EF5B2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20\",\"versionEndExcluding\":\"5.4.134\",\"matchCriteriaId\":\"508D9771-335F-44A6-9F2F-880DF1267A1F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.52\",\"matchCriteriaId\":\"7C1E6FB6-53C8-4DC4-8AE5-93094BA39F62\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.12.19\",\"matchCriteriaId\":\"34C1A2F4-DD44-4CF1-8FD4-751A0D746A9E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.13\",\"versionEndExcluding\":\"5.13.4\",\"matchCriteriaId\":\"F93FA3CC-0C79-410B-A7D7-245C2AA0723A\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1512e7dc5eb08b7d92a12e2bfcd9cb8c4a1ec069\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/29ba8e2ba89ee2862a26d91204dd5fe77ceee25a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/38660031e80eaa6cc9370b031c180612f414b00d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/481a76d4749ee3a27f902ba213fdcbb4bb39720e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5b06ca113bf197aab2ab61288f42506e0049fbab\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7272b591c4cb9327c43443f67b8fbae7657dd9ae\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a7268e8a227d5a4f0bd1584f556246b0224ab274\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b9c87ce3bc6331f82811a8cf8e930423c22523a3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ef1067d2baa847d53c9988510d99fb494de4d12c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/1512e7dc5eb08b7d92a12e2bfcd9cb8c4a1ec069\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/29ba8e2ba89ee2862a26d91204dd5fe77ceee25a\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/38660031e80eaa6cc9370b031c180612f414b00d\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/481a76d4749ee3a27f902ba213fdcbb4bb39720e\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5b06ca113bf197aab2ab61288f42506e0049fbab\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7272b591c4cb9327c43443f67b8fbae7657dd9ae\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a7268e8a227d5a4f0bd1584f556246b0224ab274\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b9c87ce3bc6331f82811a8cf8e930423c22523a3\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ef1067d2baa847d53c9988510d99fb494de4d12c\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]}]}}",
    "vulnrichment": {
      "containers": "{\"cna\": {\"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-05-29T05:06:09.549Z\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmisc/libmasm/module: Fix two use after free in ibmasm_init_one\\n\\nIn ibmasm_init_one, it calls ibmasm_init_remote_input_dev().\\nInside ibmasm_init_remote_input_dev, mouse_dev and keybd_dev are\\nallocated by input_allocate_device(), and assigned to\\nsp-\u003eremote.mouse_dev and sp-\u003eremote.keybd_dev respectively.\\n\\nIn the err_free_devices error branch of ibmasm_init_one,\\nmouse_dev and keybd_dev are freed by input_free_device(), and return\\nerror. Then the execution runs into error_send_message error branch\\nof ibmasm_init_one, where ibmasm_free_remote_input_dev(sp) is called\\nto unregister the freed sp-\u003eremote.mouse_dev and sp-\u003eremote.keybd_dev.\\n\\nMy patch add a \\\"error_init_remote\\\" label to handle the error of\\nibmasm_init_remote_input_dev(), to avoid the uaf bugs.\"}], \"affected\": [{\"product\": \"Linux\", \"vendor\": \"Linux\", \"defaultStatus\": \"unaffected\", \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"programFiles\": [\"drivers/misc/ibmasm/module.c\"], \"versions\": [{\"version\": \"1da177e4c3f4\", \"lessThan\": \"1512e7dc5eb0\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"1da177e4c3f4\", \"lessThan\": \"29ba8e2ba89e\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"1da177e4c3f4\", \"lessThan\": \"5b06ca113bf1\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"1da177e4c3f4\", \"lessThan\": \"481a76d4749e\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"1da177e4c3f4\", \"lessThan\": \"38660031e80e\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"1da177e4c3f4\", \"lessThan\": \"b9c87ce3bc63\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"1da177e4c3f4\", \"lessThan\": \"ef1067d2baa8\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"1da177e4c3f4\", \"lessThan\": \"a7268e8a227d\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"1da177e4c3f4\", \"lessThan\": \"7272b591c4cb\", \"status\": \"affected\", \"versionType\": \"git\"}]}, {\"product\": \"Linux\", \"vendor\": \"Linux\", \"defaultStatus\": \"affected\", \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"programFiles\": [\"drivers/misc/ibmasm/module.c\"], \"versions\": [{\"version\": \"4.4.276\", \"lessThanOrEqual\": \"4.4.*\", \"status\": \"unaffected\", \"versionType\": \"custom\"}, {\"version\": \"4.9.276\", \"lessThanOrEqual\": \"4.9.*\", \"status\": \"unaffected\", \"versionType\": \"custom\"}, {\"version\": \"4.14.240\", \"lessThanOrEqual\": \"4.14.*\", \"status\": \"unaffected\", \"versionType\": \"custom\"}, {\"version\": \"4.19.198\", \"lessThanOrEqual\": \"4.19.*\", \"status\": \"unaffected\", \"versionType\": \"custom\"}, {\"version\": \"5.4.134\", \"lessThanOrEqual\": \"5.4.*\", \"status\": \"unaffected\", \"versionType\": \"custom\"}, {\"version\": \"5.10.52\", \"lessThanOrEqual\": \"5.10.*\", \"status\": \"unaffected\", \"versionType\": \"custom\"}, {\"version\": \"5.12.19\", \"lessThanOrEqual\": \"5.12.*\", \"status\": \"unaffected\", \"versionType\": \"custom\"}, {\"version\": \"5.13.4\", \"lessThanOrEqual\": \"5.13.*\", \"status\": \"unaffected\", \"versionType\": \"custom\"}, {\"version\": \"5.14\", \"lessThanOrEqual\": \"*\", \"status\": \"unaffected\", \"versionType\": \"original_commit_for_fix\"}]}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/1512e7dc5eb08b7d92a12e2bfcd9cb8c4a1ec069\"}, {\"url\": \"https://git.kernel.org/stable/c/29ba8e2ba89ee2862a26d91204dd5fe77ceee25a\"}, {\"url\": \"https://git.kernel.org/stable/c/5b06ca113bf197aab2ab61288f42506e0049fbab\"}, {\"url\": \"https://git.kernel.org/stable/c/481a76d4749ee3a27f902ba213fdcbb4bb39720e\"}, {\"url\": \"https://git.kernel.org/stable/c/38660031e80eaa6cc9370b031c180612f414b00d\"}, {\"url\": \"https://git.kernel.org/stable/c/b9c87ce3bc6331f82811a8cf8e930423c22523a3\"}, {\"url\": \"https://git.kernel.org/stable/c/ef1067d2baa847d53c9988510d99fb494de4d12c\"}, {\"url\": \"https://git.kernel.org/stable/c/a7268e8a227d5a4f0bd1584f556246b0224ab274\"}, {\"url\": \"https://git.kernel.org/stable/c/7272b591c4cb9327c43443f67b8fbae7657dd9ae\"}], \"title\": \"misc/libmasm/module: Fix two use after free in ibmasm_init_one\", \"x_generator\": {\"engine\": \"bippy-a5840b7849dd\"}}, \"adp\": [{\"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47334\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-05-21T18:44:43.256479Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-05-23T19:01:25.472Z\"}, \"title\": \"CISA ADP Vulnrichment\"}]}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47334\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"Linux\", \"dateReserved\": \"2024-05-21T14:28:16.977Z\", \"datePublished\": \"2024-05-21T14:35:44.404Z\", \"dateUpdated\": \"2024-06-04T17:15:19.912Z\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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