2024-09-10 18:03:16 +00:00

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{
"id": "CVE-2024-41040",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2024-07-29T15:15:12.473",
"lastModified": "2024-09-10T17:31:47.623",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: Fix UAF when resolving a clash\n\nKASAN reports the following UAF:\n\n BUG: KASAN: slab-use-after-free in tcf_ct_flow_table_process_conn+0x12b/0x380 [act_ct]\n Read of size 1 at addr ffff888c07603600 by task handler130/6469\n\n Call Trace:\n <IRQ>\n dump_stack_lvl+0x48/0x70\n print_address_description.constprop.0+0x33/0x3d0\n print_report+0xc0/0x2b0\n kasan_report+0xd0/0x120\n __asan_load1+0x6c/0x80\n tcf_ct_flow_table_process_conn+0x12b/0x380 [act_ct]\n tcf_ct_act+0x886/0x1350 [act_ct]\n tcf_action_exec+0xf8/0x1f0\n fl_classify+0x355/0x360 [cls_flower]\n __tcf_classify+0x1fd/0x330\n tcf_classify+0x21c/0x3c0\n sch_handle_ingress.constprop.0+0x2c5/0x500\n __netif_receive_skb_core.constprop.0+0xb25/0x1510\n __netif_receive_skb_list_core+0x220/0x4c0\n netif_receive_skb_list_internal+0x446/0x620\n napi_complete_done+0x157/0x3d0\n gro_cell_poll+0xcf/0x100\n __napi_poll+0x65/0x310\n net_rx_action+0x30c/0x5c0\n __do_softirq+0x14f/0x491\n __irq_exit_rcu+0x82/0xc0\n irq_exit_rcu+0xe/0x20\n common_interrupt+0xa1/0xb0\n </IRQ>\n <TASK>\n asm_common_interrupt+0x27/0x40\n\n Allocated by task 6469:\n kasan_save_stack+0x38/0x70\n kasan_set_track+0x25/0x40\n kasan_save_alloc_info+0x1e/0x40\n __kasan_krealloc+0x133/0x190\n krealloc+0xaa/0x130\n nf_ct_ext_add+0xed/0x230 [nf_conntrack]\n tcf_ct_act+0x1095/0x1350 [act_ct]\n tcf_action_exec+0xf8/0x1f0\n fl_classify+0x355/0x360 [cls_flower]\n __tcf_classify+0x1fd/0x330\n tcf_classify+0x21c/0x3c0\n sch_handle_ingress.constprop.0+0x2c5/0x500\n __netif_receive_skb_core.constprop.0+0xb25/0x1510\n __netif_receive_skb_list_core+0x220/0x4c0\n netif_receive_skb_list_internal+0x446/0x620\n napi_complete_done+0x157/0x3d0\n gro_cell_poll+0xcf/0x100\n __napi_poll+0x65/0x310\n net_rx_action+0x30c/0x5c0\n __do_softirq+0x14f/0x491\n\n Freed by task 6469:\n kasan_save_stack+0x38/0x70\n kasan_set_track+0x25/0x40\n kasan_save_free_info+0x2b/0x60\n ____kasan_slab_free+0x180/0x1f0\n __kasan_slab_free+0x12/0x30\n slab_free_freelist_hook+0xd2/0x1a0\n __kmem_cache_free+0x1a2/0x2f0\n kfree+0x78/0x120\n nf_conntrack_free+0x74/0x130 [nf_conntrack]\n nf_ct_destroy+0xb2/0x140 [nf_conntrack]\n __nf_ct_resolve_clash+0x529/0x5d0 [nf_conntrack]\n nf_ct_resolve_clash+0xf6/0x490 [nf_conntrack]\n __nf_conntrack_confirm+0x2c6/0x770 [nf_conntrack]\n tcf_ct_act+0x12ad/0x1350 [act_ct]\n tcf_action_exec+0xf8/0x1f0\n fl_classify+0x355/0x360 [cls_flower]\n __tcf_classify+0x1fd/0x330\n tcf_classify+0x21c/0x3c0\n sch_handle_ingress.constprop.0+0x2c5/0x500\n __netif_receive_skb_core.constprop.0+0xb25/0x1510\n __netif_receive_skb_list_core+0x220/0x4c0\n netif_receive_skb_list_internal+0x446/0x620\n napi_complete_done+0x157/0x3d0\n gro_cell_poll+0xcf/0x100\n __napi_poll+0x65/0x310\n net_rx_action+0x30c/0x5c0\n __do_softirq+0x14f/0x491\n\nThe ct may be dropped if a clash has been resolved but is still passed to\nthe tcf_ct_flow_table_process_conn function for further usage. This issue\ncan be fixed by retrieving ct from skb again after confirming conntrack."
},
{
"lang": "es",
"value": "En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: net/sched: Reparar UAF al resolver un conflicto KASAN reporta el siguiente UAF: ERROR: KASAN: slab-use-after-free en tcf_ct_flow_table_process_conn+0x12b/0x380 [act_ct] Lectura de tama\u00f1o 1 en la direcci\u00f3n ffff888c07603600 por el controlador de tareas 130/6469 Seguimiento de llamadas: dump_stack_lvl+0x48/0x70 print_address_description.constprop.0+0x33/0x3d0 print_report+0xc0/0x2b0 kasan_report+0xd0/0x120 __asan_load1+0x 6c/0x80 tcf_ct_flow_table_process_conn+0x12b/0x380 [act_ct] tcf_ct_act+0x886/0x1350 [act_ct] tcf_action_exec+0xf8/0x1f0 fl_classify+0x355/0x360 [cls_flower] __tcf_classify+0x1fd/0x330 tcf_classify+0x21c/0x3c0 sch_handle_ingress.constprop.0+0x 2c5/0x500 __netif_receive_skb_core.constprop.0+0xb25 /0x1510 __netif_receive_skb_list_core+0x220/0x4c0 netif_receive_skb_list_internal+0x446/0x620 napi_complete_done+0x157/0x3d0 gro_cell_poll+0xcf/0x100 __napi_poll+0x65/0x310 net_rx_action+0x30 c/0x5c0 __do_softirq+0x14f/0x491 __irq_exit_rcu+0x82/0xc0 irq_exit_rcu+0xe/0x20 common_interrupt+0xa1 /0xb0 asm_common_interrupt+0x27/0x40 Asignado por la tarea 6469: kasan_save_stack+0x38/0x70 kasan_set_track+0x25/0x40 kasan_save_alloc_info+0x1e/0x40 __kasan_krealloc+0x133/0x190 a/0x130 nf_ct_ext_add+0xed/0x230 [ nf_conntrack] tcf_ct_act+0x1095/0x1350 [act_ct] tcf_action_exec+0xf8/0x1f0 fl_classify+0x355/0x360 [cls_flower] __tcf_classify+0x1fd/0x330 tcf_classify+0x21c/0x3c0 sch_handle_ingress.constprop. 0+0x2c5/0x500 __netif_receive_skb_core.constprop.0+0xb25/ 0x1510 __netif_receive_skb_list_core+0x220/0x4c0 netif_receive_skb_list_internal+0x446/0x620 napi_complete_done+0x157/0x3d0 gro_cell_poll+0xcf/0x100 __napi_poll+0x65/0x310 net_rx_action+0x30 c/0x5c0 __do_softirq+0x14f/0x491 Liberado por la tarea 6469: kasan_save_stack+0x38/0x70 kasan_set_track+0x25/ 0x40 kasan_save_free_info+0x2b/0x60 ____kasan_slab_free+0x180/0x1f0 __kasan_slab_free+0x12/0x30 slab_free_freelist_hook+0xd2/0x1a0 __kmem_cache_free+0x1a2/0x2f0 kfree+0x78/0x120 conntrack_free+0x74/0x130 [nf_conntrack] nf_ct_destroy+0xb2/0x140 [nf_conntrack] __nf_ct_resolve_clash+0x529 /0x5d0 [nf_conntrack] nf_ct_resolve_clash+0xf6/0x490 [nf_conntrack] __nf_conntrack_confirm+0x2c6/0x770 [nf_conntrack] tcf_ct_act+0x12ad/0x1350 [act_ct] tcf_action_exec+0xf8/0x1f0 x355/0x360 [cls_flower] __tcf_classify+0x1fd/0x330 tcf_classify+0x21c /0x3c0 sch_handle_ingress.constprop.0+0x2c5/0x500 __netif_receive_skb_core.constprop.0+0xb25/0x1510 __netif_receive_skb_list_core+0x220/0x4c0 netif_receive_skb_list_internal+0x446/0x620 napi_complete_ done+0x157/0x3d0 gro_cell_poll+0xcf/0x100 __napi_poll+0x65/0x310 net_rx_action+0x30c/0x5c0 __do_softirq+0x14f/0x491 El ct se puede descartar si se resolvi\u00f3 un conflicto pero a\u00fan se pasa a la funci\u00f3n tcf_ct_flow_table_process_conn para su uso posterior. Este problema se puede solucionar recuperando ct de skb nuevamente despu\u00e9s de confirmar conntrack."
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "nvd@nist.gov",
"type": "Primary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"attackVector": "LOCAL",
"attackComplexity": "HIGH",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH"
},
"exploitabilityScore": 1.0,
"impactScore": 5.9
}
]
},
"weaknesses": [
{
"source": "nvd@nist.gov",
"type": "Primary",
"description": [
{
"lang": "en",
"value": "CWE-416"
}
]
}
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