CVE-2021-47175
Vulnerability from cvelistv5
Published
2024-03-25 09:16
Modified
2024-12-19 07:36
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: net/sched: fq_pie: fix OOB access in the traffic path the following script: # tc qdisc add dev eth0 handle 0x1 root fq_pie flows 2 # tc qdisc add dev eth0 clsact # tc filter add dev eth0 egress matchall action skbedit priority 0x10002 # ping 192.0.2.2 -I eth0 -c2 -w1 -q produces the following splat: BUG: KASAN: slab-out-of-bounds in fq_pie_qdisc_enqueue+0x1314/0x19d0 [sch_fq_pie] Read of size 4 at addr ffff888171306924 by task ping/942 CPU: 3 PID: 942 Comm: ping Not tainted 5.12.0+ #441 Hardware name: Red Hat KVM, BIOS 1.11.1-4.module+el8.1.0+4066+0f1aadab 04/01/2014 Call Trace: dump_stack+0x92/0xc1 print_address_description.constprop.7+0x1a/0x150 kasan_report.cold.13+0x7f/0x111 fq_pie_qdisc_enqueue+0x1314/0x19d0 [sch_fq_pie] __dev_queue_xmit+0x1034/0x2b10 ip_finish_output2+0xc62/0x2120 __ip_finish_output+0x553/0xea0 ip_output+0x1ca/0x4d0 ip_send_skb+0x37/0xa0 raw_sendmsg+0x1c4b/0x2d00 sock_sendmsg+0xdb/0x110 __sys_sendto+0x1d7/0x2b0 __x64_sys_sendto+0xdd/0x1b0 do_syscall_64+0x3c/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fe69735c3eb Code: 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 f3 0f 1e fa 48 8d 05 75 42 2c 00 41 89 ca 8b 00 85 c0 75 14 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 75 c3 0f 1f 40 00 41 57 4d 89 c7 41 56 41 89 RSP: 002b:00007fff06d7fb38 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 000055e961413700 RCX: 00007fe69735c3eb RDX: 0000000000000040 RSI: 000055e961413700 RDI: 0000000000000003 RBP: 0000000000000040 R08: 000055e961410500 R09: 0000000000000010 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff06d81260 R13: 00007fff06d7fb40 R14: 00007fff06d7fc30 R15: 000055e96140f0a0 Allocated by task 917: kasan_save_stack+0x19/0x40 __kasan_kmalloc+0x7f/0xa0 __kmalloc_node+0x139/0x280 fq_pie_init+0x555/0x8e8 [sch_fq_pie] qdisc_create+0x407/0x11b0 tc_modify_qdisc+0x3c2/0x17e0 rtnetlink_rcv_msg+0x346/0x8e0 netlink_rcv_skb+0x120/0x380 netlink_unicast+0x439/0x630 netlink_sendmsg+0x719/0xbf0 sock_sendmsg+0xe2/0x110 ____sys_sendmsg+0x5ba/0x890 ___sys_sendmsg+0xe9/0x160 __sys_sendmsg+0xd3/0x170 do_syscall_64+0x3c/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae The buggy address belongs to the object at ffff888171306800 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 36 bytes to the right of 256-byte region [ffff888171306800, ffff888171306900) The buggy address belongs to the page: page:00000000bcfb624e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x171306 head:00000000bcfb624e order:1 compound_mapcount:0 flags: 0x17ffffc0010200(slab|head|node=0|zone=2|lastcpupid=0x1fffff) raw: 0017ffffc0010200 dead000000000100 dead000000000122 ffff888100042b40 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888171306800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888171306880: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc >ffff888171306900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888171306980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888171306a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fix fq_pie traffic path to avoid selecting 'q->flows + q->flows_cnt' as a valid flow: it's an address beyond the allocated memory.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7a1bdec12e43e29cc34a4394590337069d8812ce
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e6294c06e7c62ffdd5bf3df696d3a4fcbb753d3c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e70f7a11876a1a788ceadf75e9e5f7af2c868680
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/7a1bdec12e43e29cc34a4394590337069d8812ce
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/e6294c06e7c62ffdd5bf3df696d3a4fcbb753d3c
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/e70f7a11876a1a788ceadf75e9e5f7af2c868680
Impacted products
Vendor Product Version
Linux Linux Version: 5.6
Show details on NVD website

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                "id": "CVE-2021-47175",
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                "timestamp": "2024-03-28T18:24:58.134002Z",
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: fq_pie: fix OOB access in the traffic path\n\nthe following script:\n\n  # tc qdisc add dev eth0 handle 0x1 root fq_pie flows 2\n  # tc qdisc add dev eth0 clsact\n  # tc filter add dev eth0 egress matchall action skbedit priority 0x10002\n  # ping 192.0.2.2 -I eth0 -c2 -w1 -q\n\nproduces the following splat:\n\n BUG: KASAN: slab-out-of-bounds in fq_pie_qdisc_enqueue+0x1314/0x19d0 [sch_fq_pie]\n Read of size 4 at addr ffff888171306924 by task ping/942\n\n CPU: 3 PID: 942 Comm: ping Not tainted 5.12.0+ #441\n Hardware name: Red Hat KVM, BIOS 1.11.1-4.module+el8.1.0+4066+0f1aadab 04/01/2014\n Call Trace:\n  dump_stack+0x92/0xc1\n  print_address_description.constprop.7+0x1a/0x150\n  kasan_report.cold.13+0x7f/0x111\n  fq_pie_qdisc_enqueue+0x1314/0x19d0 [sch_fq_pie]\n  __dev_queue_xmit+0x1034/0x2b10\n  ip_finish_output2+0xc62/0x2120\n  __ip_finish_output+0x553/0xea0\n  ip_output+0x1ca/0x4d0\n  ip_send_skb+0x37/0xa0\n  raw_sendmsg+0x1c4b/0x2d00\n  sock_sendmsg+0xdb/0x110\n  __sys_sendto+0x1d7/0x2b0\n  __x64_sys_sendto+0xdd/0x1b0\n  do_syscall_64+0x3c/0x80\n  entry_SYSCALL_64_after_hwframe+0x44/0xae\n RIP: 0033:0x7fe69735c3eb\n Code: 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 f3 0f 1e fa 48 8d 05 75 42 2c 00 41 89 ca 8b 00 85 c0 75 14 b8 2c 00 00 00 0f 05 \u003c48\u003e 3d 00 f0 ff ff 77 75 c3 0f 1f 40 00 41 57 4d 89 c7 41 56 41 89\n RSP: 002b:00007fff06d7fb38 EFLAGS: 00000246 ORIG_RAX: 000000000000002c\n RAX: ffffffffffffffda RBX: 000055e961413700 RCX: 00007fe69735c3eb\n RDX: 0000000000000040 RSI: 000055e961413700 RDI: 0000000000000003\n RBP: 0000000000000040 R08: 000055e961410500 R09: 0000000000000010\n R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff06d81260\n R13: 00007fff06d7fb40 R14: 00007fff06d7fc30 R15: 000055e96140f0a0\n\n Allocated by task 917:\n  kasan_save_stack+0x19/0x40\n  __kasan_kmalloc+0x7f/0xa0\n  __kmalloc_node+0x139/0x280\n  fq_pie_init+0x555/0x8e8 [sch_fq_pie]\n  qdisc_create+0x407/0x11b0\n  tc_modify_qdisc+0x3c2/0x17e0\n  rtnetlink_rcv_msg+0x346/0x8e0\n  netlink_rcv_skb+0x120/0x380\n  netlink_unicast+0x439/0x630\n  netlink_sendmsg+0x719/0xbf0\n  sock_sendmsg+0xe2/0x110\n  ____sys_sendmsg+0x5ba/0x890\n  ___sys_sendmsg+0xe9/0x160\n  __sys_sendmsg+0xd3/0x170\n  do_syscall_64+0x3c/0x80\n  entry_SYSCALL_64_after_hwframe+0x44/0xae\n\n The buggy address belongs to the object at ffff888171306800\n  which belongs to the cache kmalloc-256 of size 256\n The buggy address is located 36 bytes to the right of\n  256-byte region [ffff888171306800, ffff888171306900)\n The buggy address belongs to the page:\n page:00000000bcfb624e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x171306\n head:00000000bcfb624e order:1 compound_mapcount:0\n flags: 0x17ffffc0010200(slab|head|node=0|zone=2|lastcpupid=0x1fffff)\n raw: 0017ffffc0010200 dead000000000100 dead000000000122 ffff888100042b40\n raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000\n page dumped because: kasan: bad access detected\n\n Memory state around the buggy address:\n  ffff888171306800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n  ffff888171306880: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc\n \u003effff888171306900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n                                ^\n  ffff888171306980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n  ffff888171306a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n\nfix fq_pie traffic path to avoid selecting \u0027q-\u003eflows + q-\u003eflows_cnt\u0027 as a\nvalid flow: it\u0027s an address beyond the allocated memory."
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      "title": "net/sched: fq_pie: fix OOB access in the traffic path",
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47175",
    "datePublished": "2024-03-25T09:16:25.995Z",
    "dateReserved": "2024-03-25T09:12:14.111Z",
    "dateUpdated": "2024-12-19T07:36:37.473Z",
    "state": "PUBLISHED"
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  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47175\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-03-25T10:15:09.110\",\"lastModified\":\"2024-11-21T06:35:33.540\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet/sched: fq_pie: fix OOB access in the traffic path\\n\\nthe following script:\\n\\n  # tc qdisc add dev eth0 handle 0x1 root fq_pie flows 2\\n  # tc qdisc add dev eth0 clsact\\n  # tc filter add dev eth0 egress matchall action skbedit priority 0x10002\\n  # ping 192.0.2.2 -I eth0 -c2 -w1 -q\\n\\nproduces the following splat:\\n\\n BUG: KASAN: slab-out-of-bounds in fq_pie_qdisc_enqueue+0x1314/0x19d0 [sch_fq_pie]\\n Read of size 4 at addr ffff888171306924 by task ping/942\\n\\n CPU: 3 PID: 942 Comm: ping Not tainted 5.12.0+ #441\\n Hardware name: Red Hat KVM, BIOS 1.11.1-4.module+el8.1.0+4066+0f1aadab 04/01/2014\\n Call Trace:\\n  dump_stack+0x92/0xc1\\n  print_address_description.constprop.7+0x1a/0x150\\n  kasan_report.cold.13+0x7f/0x111\\n  fq_pie_qdisc_enqueue+0x1314/0x19d0 [sch_fq_pie]\\n  __dev_queue_xmit+0x1034/0x2b10\\n  ip_finish_output2+0xc62/0x2120\\n  __ip_finish_output+0x553/0xea0\\n  ip_output+0x1ca/0x4d0\\n  ip_send_skb+0x37/0xa0\\n  raw_sendmsg+0x1c4b/0x2d00\\n  sock_sendmsg+0xdb/0x110\\n  __sys_sendto+0x1d7/0x2b0\\n  __x64_sys_sendto+0xdd/0x1b0\\n  do_syscall_64+0x3c/0x80\\n  entry_SYSCALL_64_after_hwframe+0x44/0xae\\n RIP: 0033:0x7fe69735c3eb\\n Code: 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 f3 0f 1e fa 48 8d 05 75 42 2c 00 41 89 ca 8b 00 85 c0 75 14 b8 2c 00 00 00 0f 05 \u003c48\u003e 3d 00 f0 ff ff 77 75 c3 0f 1f 40 00 41 57 4d 89 c7 41 56 41 89\\n RSP: 002b:00007fff06d7fb38 EFLAGS: 00000246 ORIG_RAX: 000000000000002c\\n RAX: ffffffffffffffda RBX: 000055e961413700 RCX: 00007fe69735c3eb\\n RDX: 0000000000000040 RSI: 000055e961413700 RDI: 0000000000000003\\n RBP: 0000000000000040 R08: 000055e961410500 R09: 0000000000000010\\n R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff06d81260\\n R13: 00007fff06d7fb40 R14: 00007fff06d7fc30 R15: 000055e96140f0a0\\n\\n Allocated by task 917:\\n  kasan_save_stack+0x19/0x40\\n  __kasan_kmalloc+0x7f/0xa0\\n  __kmalloc_node+0x139/0x280\\n  fq_pie_init+0x555/0x8e8 [sch_fq_pie]\\n  qdisc_create+0x407/0x11b0\\n  tc_modify_qdisc+0x3c2/0x17e0\\n  rtnetlink_rcv_msg+0x346/0x8e0\\n  netlink_rcv_skb+0x120/0x380\\n  netlink_unicast+0x439/0x630\\n  netlink_sendmsg+0x719/0xbf0\\n  sock_sendmsg+0xe2/0x110\\n  ____sys_sendmsg+0x5ba/0x890\\n  ___sys_sendmsg+0xe9/0x160\\n  __sys_sendmsg+0xd3/0x170\\n  do_syscall_64+0x3c/0x80\\n  entry_SYSCALL_64_after_hwframe+0x44/0xae\\n\\n The buggy address belongs to the object at ffff888171306800\\n  which belongs to the cache kmalloc-256 of size 256\\n The buggy address is located 36 bytes to the right of\\n  256-byte region [ffff888171306800, ffff888171306900)\\n The buggy address belongs to the page:\\n page:00000000bcfb624e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x171306\\n head:00000000bcfb624e order:1 compound_mapcount:0\\n flags: 0x17ffffc0010200(slab|head|node=0|zone=2|lastcpupid=0x1fffff)\\n raw: 0017ffffc0010200 dead000000000100 dead000000000122 ffff888100042b40\\n raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000\\n page dumped because: kasan: bad access detected\\n\\n Memory state around the buggy address:\\n  ffff888171306800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\\n  ffff888171306880: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc\\n \u003effff888171306900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\\n                                ^\\n  ffff888171306980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\\n  ffff888171306a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\\n\\nfix fq_pie traffic path to avoid selecting \u0027q-\u003eflows + q-\u003eflows_cnt\u0027 as a\\nvalid flow: it\u0027s an address beyond the allocated memory.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net/sched: fq_pie: arregla el acceso OOB en la ruta de tr\u00e1fico el siguiente script: # tc qdisc add dev eth0 handle 0x1 root fq_pie flows 2 # tc qdisc add dev eth0 clsact # tc filtrar agregar dev eth0 salida matchall acci\u00f3n skbedit prioridad 0x10002 # ping 192.0.2.2 -I eth0 -c2 -w1 -q produce el siguiente s\u00edmbolo: ERROR: KASAN: slab-out-of-bounds in fq_pie_qdisc_enqueue+0x1314/0x19d0 [sch_fq_pie] Leer de tama\u00f1o 4 en la direcci\u00f3n ffff888171306924 por tarea ping/942 CPU: 3 PID: 942 Comm: ping Not tainted 5.12.0+ #441 Nombre de hardware: Red Hat KVM, BIOS 1.11.1-4.module+el8.1.0+4066+ 0f1aadab 01/04/2014 Seguimiento de llamadas: dump_stack+0x92/0xc1 print_address_description.constprop.7+0x1a/0x150 kasan_report.cold.13+0x7f/0x111 fq_pie_qdisc_enqueue+0x1314/0x19d0 [sch_fq_pie] __dev_queue_x mit+0x1034/0x2b10 ip_finish_output2+0xc62/0x2120 __ip_finish_output+0x553/0xea0 ip_output+0x1ca/0x4d0 ip_send_skb+0x37/0xa0 raw_sendmsg+0x1c4b/0x2d00 sock_sendmsg+0xdb/0x110 __sys_sendto+0x1d7/0x2b0 __x64_sys_s endto+0xdd/0x1b0 do_syscall_64+0x3c/0x80 Entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fe69735c3eb C\u00f3digo: 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 f3 0f 1e fa 48 8d 05 75 42 2c 00 41 89 ca 8b 00 85 c0 75 14 b8 2c 00 00 00 0f 05 \u0026lt;48 \u0026gt; 3d 00 f0 ff ff 77 75 c3 0f 1f 40 00 41 57 4d 89 c7 41 56 41 89 RSP: 002b:00007fff06d7fb38 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 000055e961413700 RCX: 00007fe69735c3eb RDX: 0000000000000040 RSI: 000055e961413700 RDI: 0000000000000003 RBP: 0000000000000040 R08: 000055e961410500 R09: 00000000000000010 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff06d81260 R13: 00007fff06d7fb40 R14: 00007fff06d7fc30 R15: 000055e96140f0a0 Asignado por la tarea 917: kasan_save_stack+0x19/0x40 __kasan_kmalloc+0x7f/0xa0 __kmalloc_node+0x139/0x280 fq_pie_init+0x555/0x8e8 [ sch_fq_pie] qdisc_create+0x407/0x11b0 tc_modify_qdisc+0x3c2/0x17e0 rtnetlink_rcv_msg+0x346/0x8e0 netlink_rcv_skb+0x120/0x380 netlink_unicast+0x439/0x630 netlink_sendmsg+0x719/ 0xbf0 sock_sendmsg+0xe2/0x110 ____sys_sendmsg+0x5ba/0x890 ___sys_sendmsg+0xe9/0x160 __sys_sendmsg+0xd3 /0x170 do_syscall_64+0x3c/0x80 Entry_SYSCALL_64_after_hwframe+0x44/0xae La direcci\u00f3n con errores pertenece al objeto en ffff888171306800 que pertenece al cach\u00e9 kmalloc-256 de tama\u00f1o 256. La direcci\u00f3n con errores se encuentra 36 bytes a la derecha de la regi\u00f3n de 256 bytes [ffff888171306 800, ffff888171306900) La direcci\u00f3n del error pertenece a la p\u00e1gina: p\u00e1gina:00000000bcfb624e refcount:1 mapcount:0 mapeo:0000000000000000 index:0x0 pfn:0x171306 head:00000000bcfb624e order:1 composite_mapcount:0 flags: 0x17ffffc00 10200(losa|cabeza|nodo=0|zona =2|lastcpupid=0x1fffff) raw: 0017ffffc0010200 dead000000000100 dead000000000122 ffff888100042b40 raw: 000000000000000000 0000000000100010 00000001ffffffff 0000000000000000 p\u00e1gina volcada porque: kasan: se detect\u00f3 mal acceso Estado de la memoria alrededor de la direcci\u00f3n con errores: ffff888171306800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888171306880: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc \u0026gt;ffff888171306900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888 171306980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888171306a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb corrige la ruta de tr\u00e1fico fq_pie para evitar seleccionar \u0027q-\u0026gt;flows + q-\u0026gt;flows_cnt\u0027 como un flujo v\u00e1lido: es una direcci\u00f3n m\u00e1s all\u00e1 de la memoria asignada.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/7a1bdec12e43e29cc34a4394590337069d8812ce\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e6294c06e7c62ffdd5bf3df696d3a4fcbb753d3c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e70f7a11876a1a788ceadf75e9e5f7af2c868680\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7a1bdec12e43e29cc34a4394590337069d8812ce\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/e6294c06e7c62ffdd5bf3df696d3a4fcbb753d3c\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/e70f7a11876a1a788ceadf75e9e5f7af2c868680\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}"
  }
}


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