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nvd-json-data-feeds/CVE-2021/CVE-2021-473xx/CVE-2021-47346.json
cad-safe-bot 7ab230f046 Auto-Update: 2025-03-16T03:00:19.723046+00:00
2025-03-16 03:03:50 +00:00

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{
"id": "CVE-2021-47346",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2024-05-21T15:15:21.217",
"lastModified": "2025-03-06T12:57:41.553",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: tmc-etf: Fix global-out-of-bounds in tmc_update_etf_buffer()\n\ncommit 6f755e85c332 (\"coresight: Add helper for inserting synchronization\npackets\") removed trailing '\\0' from barrier_pkt array and updated the\ncall sites like etb_update_buffer() to have proper checks for barrier_pkt\nsize before read but missed updating tmc_update_etf_buffer() which still\nreads barrier_pkt past the array size resulting in KASAN out-of-bounds\nbug. Fix this by adding a check for barrier_pkt size before accessing\nlike it is done in etb_update_buffer().\n\n BUG: KASAN: global-out-of-bounds in tmc_update_etf_buffer+0x4b8/0x698\n Read of size 4 at addr ffffffd05b7d1030 by task perf/2629\n\n Call trace:\n dump_backtrace+0x0/0x27c\n show_stack+0x20/0x2c\n dump_stack+0x11c/0x188\n print_address_description+0x3c/0x4a4\n __kasan_report+0x140/0x164\n kasan_report+0x10/0x18\n __asan_report_load4_noabort+0x1c/0x24\n tmc_update_etf_buffer+0x4b8/0x698\n etm_event_stop+0x248/0x2d8\n etm_event_del+0x20/0x2c\n event_sched_out+0x214/0x6f0\n group_sched_out+0xd0/0x270\n ctx_sched_out+0x2ec/0x518\n __perf_event_task_sched_out+0x4fc/0xe6c\n __schedule+0x1094/0x16a0\n preempt_schedule_irq+0x88/0x170\n arm64_preempt_schedule_irq+0xf0/0x18c\n el1_irq+0xe8/0x180\n perf_event_exec+0x4d8/0x56c\n setup_new_exec+0x204/0x400\n load_elf_binary+0x72c/0x18c0\n search_binary_handler+0x13c/0x420\n load_script+0x500/0x6c4\n search_binary_handler+0x13c/0x420\n exec_binprm+0x118/0x654\n __do_execve_file+0x77c/0xba4\n __arm64_compat_sys_execve+0x98/0xac\n el0_svc_common+0x1f8/0x5e0\n el0_svc_compat_handler+0x84/0xb0\n el0_svc_compat+0x10/0x50\n\n The buggy address belongs to the variable:\n barrier_pkt+0x10/0x40\n\n Memory state around the buggy address:\n ffffffd05b7d0f00: fa fa fa fa 04 fa fa fa fa fa fa fa 00 00 00 00\n ffffffd05b7d0f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n >ffffffd05b7d1000: 00 00 00 00 00 00 fa fa fa fa fa fa 00 00 00 03\n ^\n ffffffd05b7d1080: fa fa fa fa 00 02 fa fa fa fa fa fa 03 fa fa fa\n ffffffd05b7d1100: fa fa fa fa 00 00 00 00 05 fa fa fa fa fa fa fa\n =================================================================="
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: coresight: tmc-etf: Correcci\u00f3n global fuera de los l\u00edmites en tmc_update_etf_buffer() confirmaci\u00f3n 6f755e85c332 (\"coresight: Agregar ayuda para insertar paquetes de sincronizaci\u00f3n\") eliminado el final '\\0' desde la matriz barrier_pkt y actualic\u00e9 los sitios de llamadas como etb_update_buffer() para realizar comprobaciones adecuadas del tama\u00f1o de la barrera_pkt antes de leer, pero no se actualiz\u00f3 tmc_update_etf_buffer(), que todav\u00eda lee barrier_pkt m\u00e1s all\u00e1 del tama\u00f1o de la matriz, lo que genera un error de KASAN fuera de los l\u00edmites. Solucione este problema agregando una verificaci\u00f3n del tama\u00f1o de barrier_pkt antes de acceder, como se hace en etb_update_buffer(). bug: KASAN: global fuera de los l\u00edmites en tmc_update_etf_buffer+0x4b8/0x698 Lectura de tama\u00f1o 4 en la direcci\u00f3n ffffffd05b7d1030 por tarea perf/2629 Rastreo de llamadas: dump_backtrace+0x0/0x27c show_stack+0x20/0x2c dump_stack+0x11c/0x188 descripci\u00f3n+0x3c /0x4a4 __kasan_report+0x140/0x164 kasan_report+0x10/0x18 __asan_report_load4_noabort+0x1c/0x24 tmc_update_etf_buffer+0x4b8/0x698 etm_event_stop+0x248/0x2d8 etm_event_del+0x20/0x2c event_sched_out+0x214/0x6f0 group_sched_out+0xd0/0x270 ctx_sched_out+0x2ec/0x518 __perf_event_task_sched_out+0x4fc /0xe6c __schedule+0x1094/0x16a0 preempt_schedule_irq+0x88/0x170 arm64_preempt_schedule_irq+0xf0/0x18c el1_irq+0xe8/0x180 perf_event_exec+0x4d8/0x56c setup_new_exec+0x204/0x4 00 load_elf_binary+0x72c/0x18c0 search_binary_handler+0x13c/0x420 load_script+0x500/0x6c4 search_binary_handler+0x13c /0x420 exec_binprm+0x118/0x654 __do_execve_file+0x77c/0xba4 __arm64_compat_sys_execve+0x98/0xac el0_svc_common+0x1f8/0x5e0 el0_svc_compat_handler+0x84/0xb0 x10/0x50 La direcci\u00f3n del buggy pertenece a la variable: barrier_pkt+0x10/0x40 Estado de la memoria alrededor del buggy direcci\u00f3n: ffffffd05b7d0f00: fa fa fa fa 04 fa fa fa fa fa fa fa 00 00 00 00 ffffffd05b7d0f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffffd05b7d1000: 0 00 00 00 00 00 fa fa fa fa fa fa 00 00 00 03 ^ ffffffd05b7d1080: fa fa fa fa 00 02 fa fa fa fa fa fa 03 fa fa fa ffffffd05b7d1100: fa fa fa fa 00 00 00 00 05 fa fa fa fa fa fa fa ====== ==================================================== =========="
}
],
"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",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.8,
"impactScore": 5.2
}
]
},
"weaknesses": [
{
"source": "nvd@nist.gov",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-125"
}
]
}
],
"configurations": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
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