{"uuid": "de098051-c3b8-4057-8ebd-6021eb5c547f", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2021-47633", "type": "published-proof-of-concept", "source": "https://t.me/DarkWebInformer_CVEAlerts/16490", "content": "\ud83d\udd17 DarkWebInformer.com - Cyber Threat Intelligence\n\ud83d\udccc CVE ID: CVE-2021-47633\n\ud83d\udd25 CVSS Score: N/A\n\ud83d\udd39 Description: In the Linux kernel, the following vulnerability has been resolved:\n\nath5k: fix OOB in ath5k_eeprom_read_pcal_info_5111\n\nThe bug was found during fuzzing. Stacktrace locates it in\nath5k_eeprom_convert_pcal_info_5111.\nWhen none of the curve is selected in the loop, idx can go\nup to AR5K_EEPROM_N_PD_CURVES. The line makes pd out of bound.\npd = &chinfo[pier].pd_curves[idx];\n\nThere are many OOB writes using pd later in the code. So I\nadded a sanity check for idx. Checks for other loops involving\nAR5K_EEPROM_N_PD_CURVES are not needed as the loop index is not\nused outside the loops.\n\nThe patch is NOT tested with real device.\n\nThe following is the fuzzing report\n\nBUG: KASAN: slab-out-of-bounds in ath5k_eeprom_read_pcal_info_5111+0x126a/0x1390 [ath5k]\nWrite of size 1 at addr ffff8880174a4d60 by task modprobe/214\n\nCPU: 0 PID: 214 Comm: modprobe Not tainted 5.6.0 #1\nCall Trace:\n dump_stack+0x76/0xa0\n print_address_description.constprop.0+0x16/0x200\n ? ath5k_eeprom_read_pcal_info_5111+0x126a/0x1390 [ath5k]\n ? ath5k_eeprom_read_pcal_info_5111+0x126a/0x1390 [ath5k]\n __kasan_report.cold+0x37/0x7c\n ? ath5k_eeprom_read_pcal_info_5111+0x126a/0x1390 [ath5k]\n kasan_report+0xe/0x20\n ath5k_eeprom_read_pcal_info_5111+0x126a/0x1390 [ath5k]\n ? apic_timer_interrupt+0xa/0x20\n ? ath5k_eeprom_init_11a_pcal_freq+0xbc0/0xbc0 [ath5k]\n ? ath5k_pci_eeprom_read+0x228/0x3c0 [ath5k]\n ath5k_eeprom_init+0x2513/0x6290 [ath5k]\n ? ath5k_eeprom_init_11a_pcal_freq+0xbc0/0xbc0 [ath5k]\n ? usleep_range+0xb8/0x100\n ? apic_timer_interrupt+0xa/0x20\n ? ath5k_eeprom_read_pcal_info_2413+0x2f20/0x2f20 [ath5k]\n ath5k_hw_init+0xb60/0x1970 [ath5k]\n ath5k_init_ah+0x6fe/0x2530 [ath5k]\n ? kasprintf+0xa6/0xe0\n ? ath5k_stop+0x140/0x140 [ath5k]\n ? _dev_notice+0xf6/0xf6\n ? apic_timer_interrupt+0xa/0x20\n ath5k_pci_probe.cold+0x29a/0x3d6 [ath5k]\n ? ath5k_pci_eeprom_read+0x3c0/0x3c0 [ath5k]\n ? mutex_lock+0x89/0xd0\n ? ath5k_pci_eeprom_read+0x3c0/0x3c0 [ath5k]\n local_pci_probe+0xd3/0x160\n pci_device_probe+0x23f/0x3e0\n ? pci_device_remove+0x280/0x280\n ? pci_device_remove+0x280/0x280\n really_probe+0x209/0x5d0\n\ud83d\udccf Published: 2025-02-26T01:54:08.651Z\n\ud83d\udccf Modified: 2025-05-15T12:32:43.990Z\n\ud83d\udd17 References:\n1. https://git.kernel.org/stable/c/f4de974019a0adf34d0e7de6b86252f1bd266b06\n2. https://git.kernel.org/stable/c/ed3dfdaa8b5f0579eabfc1c5818eed30cfe1fe84\n3. https://git.kernel.org/stable/c/25efc5d03455c3839249bc77fce5e29ecb54677e\n4. https://git.kernel.org/stable/c/c4e2f577271e158d87a916afb4e87415a88ce856\n5. https://git.kernel.org/stable/c/9d7d83d0399e23d66fd431b553842a84ac10398f\n6. https://git.kernel.org/stable/c/be2f81024e7981565d90a4c9ca3067d11b6bca7f\n7. https://git.kernel.org/stable/c/fc8f7752a82f4accb99c0f1a868906ba1eb7b86f\n8. https://git.kernel.org/stable/c/cbd96d6cad6625feba9c8d101ed4977d53e82f8e\n9. https://git.kernel.org/stable/c/564d4eceb97eaf381dd6ef6470b06377bb50c95a", "creation_timestamp": "2025-05-15T13:33:34.000000Z"}