cve-2024-39510
Vulnerability from cvelistv5
Published
2024-07-12 12:20
Modified
2024-12-19 09:07
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: cachefiles: fix slab-use-after-free in cachefiles_ondemand_daemon_read() We got the following issue in a fuzz test of randomly issuing the restore command: ================================================================== BUG: KASAN: slab-use-after-free in cachefiles_ondemand_daemon_read+0xb41/0xb60 Read of size 8 at addr ffff888122e84088 by task ondemand-04-dae/963 CPU: 13 PID: 963 Comm: ondemand-04-dae Not tainted 6.8.0-dirty #564 Call Trace: kasan_report+0x93/0xc0 cachefiles_ondemand_daemon_read+0xb41/0xb60 vfs_read+0x169/0xb50 ksys_read+0xf5/0x1e0 Allocated by task 116: kmem_cache_alloc+0x140/0x3a0 cachefiles_lookup_cookie+0x140/0xcd0 fscache_cookie_state_machine+0x43c/0x1230 [...] Freed by task 792: kmem_cache_free+0xfe/0x390 cachefiles_put_object+0x241/0x480 fscache_cookie_state_machine+0x5c8/0x1230 [...] ================================================================== Following is the process that triggers the issue: mount | daemon_thread1 | daemon_thread2 ------------------------------------------------------------ cachefiles_withdraw_cookie cachefiles_ondemand_clean_object(object) cachefiles_ondemand_send_req REQ_A = kzalloc(sizeof(*req) + data_len) wait_for_completion(&REQ_A->done) cachefiles_daemon_read cachefiles_ondemand_daemon_read REQ_A = cachefiles_ondemand_select_req msg->object_id = req->object->ondemand->ondemand_id ------ restore ------ cachefiles_ondemand_restore xas_for_each(&xas, req, ULONG_MAX) xas_set_mark(&xas, CACHEFILES_REQ_NEW) cachefiles_daemon_read cachefiles_ondemand_daemon_read REQ_A = cachefiles_ondemand_select_req copy_to_user(_buffer, msg, n) xa_erase(&cache->reqs, id) complete(&REQ_A->done) ------ close(fd) ------ cachefiles_ondemand_fd_release cachefiles_put_object cachefiles_put_object kmem_cache_free(cachefiles_object_jar, object) REQ_A->object->ondemand->ondemand_id // object UAF !!! When we see the request within xa_lock, req->object must not have been freed yet, so grab the reference count of object before xa_unlock to avoid the above issue.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3958679c49152391209b32be3357193300a51abdPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/93064676a2820420a2d37d7c8289f277fe20793dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cb55625f8eb9d2de8be4da0c4580d48cbb32058ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/da4a827416066191aafeeccee50a8836a826ba10Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/3958679c49152391209b32be3357193300a51abdPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/93064676a2820420a2d37d7c8289f277fe20793dPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/cb55625f8eb9d2de8be4da0c4580d48cbb32058ePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/da4a827416066191aafeeccee50a8836a826ba10Patch
Impacted products
Vendor Product Version
Linux Linux Version: f17443d52d805c9a7fab5e67a4e8b973626fe1cd
Version: f740fd943bb1fbf79b7eaba3c71eb7536f437f51
Version: 0a7e54c1959c0feb2de23397ec09c7692364313e
Version: 0a7e54c1959c0feb2de23397ec09c7692364313e
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   Linux Linux Version: 6.8
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        cachefiles_ondemand_restore\\n                                  xas_for_each(&xas, req, ULONG_MAX)\\n                                   xas_set_mark(&xas, CACHEFILES_REQ_NEW)\\n\\n                                  cachefiles_daemon_read\\n                                   cachefiles_ondemand_daemon_read\\n                                    REQ_A = cachefiles_ondemand_select_req\\n              copy_to_user(_buffer, msg, n)\\n               xa_erase(&cache->reqs, id)\\n               complete(&REQ_A->done)\\n              ------ close(fd) ------\\n              cachefiles_ondemand_fd_release\\n               cachefiles_put_object\\n cachefiles_put_object\\n  kmem_cache_free(cachefiles_object_jar, object)\\n                                    REQ_A->object->ondemand->ondemand_id\\n                                     // object UAF !!!\\n\\nWhen we see the request within xa_lock, req->object must not have been\\nfreed yet, so grab the reference count of object before xa_unlock to\\navoid the above issue.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvió la siguiente vulnerabilidad: cachefiles: fix slab-use-after-free in cachefiles_ondemand_daemon_read() Obtuvimos el siguiente problema en una prueba de ejecución aleatoria del comando de restauración: ======== ==================================================== ======== ERROR: KASAN: slab-use-after-free en cachefiles_ondemand_daemon_read+0xb41/0xb60 Lectura de tamaño 8 en la dirección ffff888122e84088 por tarea ondemand-04-dae/963 CPU: 13 PID: 963 Comm: ondemand -04-dae Not tainted 6.8.0-dirty #564 Seguimiento de llamadas: kasan_report+0x93/0xc0 cachefiles_ondemand_daemon_read+0xb41/0xb60 vfs_read+0x169/0xb50 ksys_read+0xf5/0x1e0 Asignado por tarea 116: kmem_cache_alloc+0x14 0/0x3a0 cachefiles_lookup_cookie+0x140/ 0xcd0 fscache_cookie_state_machine+0x43c/0x1230 [...] Liberado por la tarea 792: kmem_cache_free+0xfe/0x390 cachefiles_put_object+0x241/0x480 fscache_cookie_state_machine+0x5c8/0x1230 [...] =============== ==================================================== == El siguiente es el proceso que desencadena el problema: montar | daemon_thread1 | daemon_thread2 ------------------------------------------------- ----------- cachefiles_withdraw_cookie cachefiles_ondemand_clean_object(object) cachefiles_ondemand_send_req REQ_A = kzalloc(sizeof(*req) + data_len) wait_for_completion(&REQ_A->done) cachefiles_daemon_read cachefiles_ondemand_daemon_read REQ_A = cachefiles_ondemand_select_req- >object_id = solicitud->objeto ->ondemand->ondemand_id ------ restaurar ------ cachefiles_ondemand_restore xas_for_each(&xas, req, ULONG_MAX) xas_set_mark(&xas, CACHEFILES_REQ_NEW) cachefiles_daemon_read cachefiles_ondemand_daemon_read REQ_A = cachefiles_ondemand_select_req er, mensaje, n) xa_erase(&cache ->reqs, id) complete(&REQ_A->done) ------ close(fd) ------ cachefiles_ondemand_fd_release cachefiles_put_object cachefiles_put_object kmem_cache_free(cachefiles_object_jar, object) REQ_A->object->ondemand->ondemand_id // objeto UAF !!! Cuando vemos la solicitud dentro de xa_lock, req->object no debe haberse liberado aún, así que tome el recuento de referencia del objeto antes de xa_unlock para evitar el problema anterior.\"}],\"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:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.8\",\"versionEndExcluding\":\"6.9.6\",\"matchCriteriaId\":\"5A16B675-D12F-49F9-AB96-23E6074FF336\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.10:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"2EBB4392-5FA6-4DA9-9772-8F9C750109FA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.10:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"331C2F14-12C7-45D5-893D-8C52EE38EA10\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.10:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"3173713D-909A-4DD3-9DD4-1E171EB057EE\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3958679c49152391209b32be3357193300a51abd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/93064676a2820420a2d37d7c8289f277fe20793d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/cb55625f8eb9d2de8be4da0c4580d48cbb32058e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/da4a827416066191aafeeccee50a8836a826ba10\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3958679c49152391209b32be3357193300a51abd\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/93064676a2820420a2d37d7c8289f277fe20793d\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/cb55625f8eb9d2de8be4da0c4580d48cbb32058e\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/da4a827416066191aafeeccee50a8836a826ba10\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]}]}}",
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         containers: "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/cb55625f8eb9d2de8be4da0c4580d48cbb32058e\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/3958679c49152391209b32be3357193300a51abd\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/93064676a2820420a2d37d7c8289f277fe20793d\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/da4a827416066191aafeeccee50a8836a826ba10\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T04:26:15.474Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-39510\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T17:06:40.868593Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:24.971Z\"}}], \"cna\": {\"title\": \"cachefiles: fix slab-use-after-free in cachefiles_ondemand_daemon_read()\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"f17443d52d80\", \"lessThan\": \"cb55625f8eb9\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"f740fd943bb1\", \"lessThan\": \"3958679c4915\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0a7e54c1959c\", \"lessThan\": \"93064676a282\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0a7e54c1959c\", \"lessThan\": \"da4a82741606\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/cachefiles/ondemand.c\", \"include/trace/events/cachefiles.h\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.8\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.8\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.9.6\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.9.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/cachefiles/ondemand.c\", \"include/trace/events/cachefiles.h\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/cb55625f8eb9d2de8be4da0c4580d48cbb32058e\"}, {\"url\": \"https://git.kernel.org/stable/c/3958679c49152391209b32be3357193300a51abd\"}, {\"url\": \"https://git.kernel.org/stable/c/93064676a2820420a2d37d7c8289f277fe20793d\"}, {\"url\": \"https://git.kernel.org/stable/c/da4a827416066191aafeeccee50a8836a826ba10\"}], \"x_generator\": {\"engine\": \"bippy-9e1c9544281a\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ncachefiles: fix slab-use-after-free in cachefiles_ondemand_daemon_read()\\n\\nWe got the following issue in a fuzz test of randomly issuing the restore\\ncommand:\\n\\n==================================================================\\nBUG: KASAN: slab-use-after-free in cachefiles_ondemand_daemon_read+0xb41/0xb60\\nRead of size 8 at addr ffff888122e84088 by task ondemand-04-dae/963\\n\\nCPU: 13 PID: 963 Comm: ondemand-04-dae Not tainted 6.8.0-dirty #564\\nCall Trace:\\n kasan_report+0x93/0xc0\\n cachefiles_ondemand_daemon_read+0xb41/0xb60\\n vfs_read+0x169/0xb50\\n ksys_read+0xf5/0x1e0\\n\\nAllocated by task 116:\\n kmem_cache_alloc+0x140/0x3a0\\n cachefiles_lookup_cookie+0x140/0xcd0\\n fscache_cookie_state_machine+0x43c/0x1230\\n [...]\\n\\nFreed by task 792:\\n kmem_cache_free+0xfe/0x390\\n cachefiles_put_object+0x241/0x480\\n fscache_cookie_state_machine+0x5c8/0x1230\\n [...]\\n==================================================================\\n\\nFollowing is the process that triggers the issue:\\n\\n     mount  |   daemon_thread1    |    daemon_thread2\\n------------------------------------------------------------\\ncachefiles_withdraw_cookie\\n cachefiles_ondemand_clean_object(object)\\n  cachefiles_ondemand_send_req\\n   REQ_A = kzalloc(sizeof(*req) + data_len)\\n   wait_for_completion(&REQ_A->done)\\n\\n            cachefiles_daemon_read\\n             cachefiles_ondemand_daemon_read\\n              REQ_A = cachefiles_ondemand_select_req\\n              msg->object_id = req->object->ondemand->ondemand_id\\n                                  ------ restore ------\\n                                  cachefiles_ondemand_restore\\n                                  xas_for_each(&xas, req, ULONG_MAX)\\n                                   xas_set_mark(&xas, CACHEFILES_REQ_NEW)\\n\\n                                  cachefiles_daemon_read\\n                                   cachefiles_ondemand_daemon_read\\n                                    REQ_A = cachefiles_ondemand_select_req\\n              copy_to_user(_buffer, msg, n)\\n               xa_erase(&cache->reqs, id)\\n               complete(&REQ_A->done)\\n              ------ close(fd) ------\\n              cachefiles_ondemand_fd_release\\n               cachefiles_put_object\\n cachefiles_put_object\\n  kmem_cache_free(cachefiles_object_jar, object)\\n                                    REQ_A->object->ondemand->ondemand_id\\n                                     // object UAF !!!\\n\\nWhen we see the request within xa_lock, req->object must not have been\\nfreed yet, so grab the reference count of object before xa_unlock to\\navoid the above issue.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-11-05T09:32:42.248Z\"}}}",
         cveMetadata: "{\"cveId\": \"CVE-2024-39510\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-11-05T09:32:42.248Z\", \"dateReserved\": \"2024-06-25T14:23:23.753Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-07-12T12:20:40.901Z\", \"assignerShortName\": \"Linux\"}",
         dataType: "CVE_RECORD",
         dataVersion: "5.1",
      },
   },
}


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