cve-2024-37356
Vulnerability from cvelistv5
Published
2024-06-21 10:18
Modified
2024-11-05 09:29
Severity ?
Summary
tcp: Fix shift-out-of-bounds in dctcp_update_alpha().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/02261d3f9dc7d1d7be7d778f839e3404ab99034c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/06d0fe049b51b0a92a70df8333fd85c4ba3eb2c6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/237340dee373b97833a491d2e99fcf1d4a9adafd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3ebc46ca8675de6378e3f8f40768e180bb8afa66
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6aacaa80d962f4916ccf90e2080306cec6c90fcf
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8602150286a2a860a1dc55cbd04f99316f19b40a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e65d13ec00a738fa7661925fd5929ab3c765d4be
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e9b2f60636d18dfd0dd4965b3316f88dfd6a2b31
Impacted products
Vendor Product Version
Linux Linux Version: 3.18
Show details on NVD website

To clipboard 

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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: Fix shift-out-of-bounds in dctcp_update_alpha().\n\nIn dctcp_update_alpha(), we use a module parameter dctcp_shift_g\nas follows:\n\n  alpha -= min_not_zero(alpha, alpha \u003e\u003e dctcp_shift_g);\n  ...\n  delivered_ce \u003c\u003c= (10 - dctcp_shift_g);\n\nIt seems syzkaller started fuzzing module parameters and triggered\nshift-out-of-bounds [0] by setting 100 to dctcp_shift_g:\n\n  memcpy((void*)0x20000080,\n         \"/sys/module/tcp_dctcp/parameters/dctcp_shift_g\\000\", 47);\n  res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x20000080ul,\n                /*flags=*/2ul, /*mode=*/0ul);\n  memcpy((void*)0x20000000, \"100\\000\", 4);\n  syscall(__NR_write, /*fd=*/r[0], /*val=*/0x20000000ul, /*len=*/4ul);\n\nLet\u0027s limit the max value of dctcp_shift_g by param_set_uint_minmax().\n\nWith this patch:\n\n  # echo 10 \u003e /sys/module/tcp_dctcp/parameters/dctcp_shift_g\n  # cat /sys/module/tcp_dctcp/parameters/dctcp_shift_g\n  10\n  # echo 11 \u003e /sys/module/tcp_dctcp/parameters/dctcp_shift_g\n  -bash: echo: write error: Invalid argument\n\n[0]:\nUBSAN: shift-out-of-bounds in net/ipv4/tcp_dctcp.c:143:12\nshift exponent 100 is too large for 32-bit type \u0027u32\u0027 (aka \u0027unsigned int\u0027)\nCPU: 0 PID: 8083 Comm: syz-executor345 Not tainted 6.9.0-05151-g1b294a1f3561 #2\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS\n1.13.0-1ubuntu1.1 04/01/2014\nCall Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0x201/0x300 lib/dump_stack.c:114\n ubsan_epilogue lib/ubsan.c:231 [inline]\n __ubsan_handle_shift_out_of_bounds+0x346/0x3a0 lib/ubsan.c:468\n dctcp_update_alpha+0x540/0x570 net/ipv4/tcp_dctcp.c:143\n tcp_in_ack_event net/ipv4/tcp_input.c:3802 [inline]\n tcp_ack+0x17b1/0x3bc0 net/ipv4/tcp_input.c:3948\n tcp_rcv_state_process+0x57a/0x2290 net/ipv4/tcp_input.c:6711\n tcp_v4_do_rcv+0x764/0xc40 net/ipv4/tcp_ipv4.c:1937\n sk_backlog_rcv include/net/sock.h:1106 [inline]\n __release_sock+0x20f/0x350 net/core/sock.c:2983\n release_sock+0x61/0x1f0 net/core/sock.c:3549\n mptcp_subflow_shutdown+0x3d0/0x620 net/mptcp/protocol.c:2907\n mptcp_check_send_data_fin+0x225/0x410 net/mptcp/protocol.c:2976\n __mptcp_close+0x238/0xad0 net/mptcp/protocol.c:3072\n mptcp_close+0x2a/0x1a0 net/mptcp/protocol.c:3127\n inet_release+0x190/0x1f0 net/ipv4/af_inet.c:437\n __sock_release net/socket.c:659 [inline]\n sock_close+0xc0/0x240 net/socket.c:1421\n __fput+0x41b/0x890 fs/file_table.c:422\n task_work_run+0x23b/0x300 kernel/task_work.c:180\n exit_task_work include/linux/task_work.h:38 [inline]\n do_exit+0x9c8/0x2540 kernel/exit.c:878\n do_group_exit+0x201/0x2b0 kernel/exit.c:1027\n __do_sys_exit_group kernel/exit.c:1038 [inline]\n __se_sys_exit_group kernel/exit.c:1036 [inline]\n __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1036\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xe4/0x240 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x67/0x6f\nRIP: 0033:0x7f6c2b5005b6\nCode: Unable to access opcode bytes at 0x7f6c2b50058c.\nRSP: 002b:00007ffe883eb948 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7\nRAX: ffffffffffffffda RBX: 00007f6c2b5862f0 RCX: 00007f6c2b5005b6\nRDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001\nRBP: 0000000000000001 R08: 00000000000000e7 R09: ffffffffffffffc0\nR10: 0000000000000006 R11: 0000000000000246 R12: 00007f6c2b5862f0\nR13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001\n \u003c/TASK\u003e"
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      "title": "tcp: Fix shift-out-of-bounds in dctcp_update_alpha().",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-37356",
    "datePublished": "2024-06-21T10:18:11.642Z",
    "dateReserved": "2024-06-21T10:13:16.306Z",
    "dateUpdated": "2024-11-05T09:29:20.596Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-37356\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-06-21T11:15:10.677\",\"lastModified\":\"2024-07-15T07:15:07.650\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ntcp: Fix shift-out-of-bounds in dctcp_update_alpha().\\n\\nIn dctcp_update_alpha(), we use a module parameter dctcp_shift_g\\nas follows:\\n\\n  alpha -= min_not_zero(alpha, alpha \u003e\u003e dctcp_shift_g);\\n  ...\\n  delivered_ce \u003c\u003c= (10 - dctcp_shift_g);\\n\\nIt seems syzkaller started fuzzing module parameters and triggered\\nshift-out-of-bounds [0] by setting 100 to dctcp_shift_g:\\n\\n  memcpy((void*)0x20000080,\\n         \\\"/sys/module/tcp_dctcp/parameters/dctcp_shift_g\\\\000\\\", 47);\\n  res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x20000080ul,\\n                /*flags=*/2ul, /*mode=*/0ul);\\n  memcpy((void*)0x20000000, \\\"100\\\\000\\\", 4);\\n  syscall(__NR_write, /*fd=*/r[0], /*val=*/0x20000000ul, /*len=*/4ul);\\n\\nLet\u0027s limit the max value of dctcp_shift_g by param_set_uint_minmax().\\n\\nWith this patch:\\n\\n  # echo 10 \u003e /sys/module/tcp_dctcp/parameters/dctcp_shift_g\\n  # cat /sys/module/tcp_dctcp/parameters/dctcp_shift_g\\n  10\\n  # echo 11 \u003e /sys/module/tcp_dctcp/parameters/dctcp_shift_g\\n  -bash: echo: write error: Invalid argument\\n\\n[0]:\\nUBSAN: shift-out-of-bounds in net/ipv4/tcp_dctcp.c:143:12\\nshift exponent 100 is too large for 32-bit type \u0027u32\u0027 (aka \u0027unsigned int\u0027)\\nCPU: 0 PID: 8083 Comm: syz-executor345 Not tainted 6.9.0-05151-g1b294a1f3561 #2\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS\\n1.13.0-1ubuntu1.1 04/01/2014\\nCall Trace:\\n \u003cTASK\u003e\\n __dump_stack lib/dump_stack.c:88 [inline]\\n dump_stack_lvl+0x201/0x300 lib/dump_stack.c:114\\n ubsan_epilogue lib/ubsan.c:231 [inline]\\n __ubsan_handle_shift_out_of_bounds+0x346/0x3a0 lib/ubsan.c:468\\n dctcp_update_alpha+0x540/0x570 net/ipv4/tcp_dctcp.c:143\\n tcp_in_ack_event net/ipv4/tcp_input.c:3802 [inline]\\n tcp_ack+0x17b1/0x3bc0 net/ipv4/tcp_input.c:3948\\n tcp_rcv_state_process+0x57a/0x2290 net/ipv4/tcp_input.c:6711\\n tcp_v4_do_rcv+0x764/0xc40 net/ipv4/tcp_ipv4.c:1937\\n sk_backlog_rcv include/net/sock.h:1106 [inline]\\n __release_sock+0x20f/0x350 net/core/sock.c:2983\\n release_sock+0x61/0x1f0 net/core/sock.c:3549\\n mptcp_subflow_shutdown+0x3d0/0x620 net/mptcp/protocol.c:2907\\n mptcp_check_send_data_fin+0x225/0x410 net/mptcp/protocol.c:2976\\n __mptcp_close+0x238/0xad0 net/mptcp/protocol.c:3072\\n mptcp_close+0x2a/0x1a0 net/mptcp/protocol.c:3127\\n inet_release+0x190/0x1f0 net/ipv4/af_inet.c:437\\n __sock_release net/socket.c:659 [inline]\\n sock_close+0xc0/0x240 net/socket.c:1421\\n __fput+0x41b/0x890 fs/file_table.c:422\\n task_work_run+0x23b/0x300 kernel/task_work.c:180\\n exit_task_work include/linux/task_work.h:38 [inline]\\n do_exit+0x9c8/0x2540 kernel/exit.c:878\\n do_group_exit+0x201/0x2b0 kernel/exit.c:1027\\n __do_sys_exit_group kernel/exit.c:1038 [inline]\\n __se_sys_exit_group kernel/exit.c:1036 [inline]\\n __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1036\\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\\n do_syscall_64+0xe4/0x240 arch/x86/entry/common.c:83\\n entry_SYSCALL_64_after_hwframe+0x67/0x6f\\nRIP: 0033:0x7f6c2b5005b6\\nCode: Unable to access opcode bytes at 0x7f6c2b50058c.\\nRSP: 002b:00007ffe883eb948 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7\\nRAX: ffffffffffffffda RBX: 00007f6c2b5862f0 RCX: 00007f6c2b5005b6\\nRDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001\\nRBP: 0000000000000001 R08: 00000000000000e7 R09: ffffffffffffffc0\\nR10: 0000000000000006 R11: 0000000000000246 R12: 00007f6c2b5862f0\\nR13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001\\n \u003c/TASK\u003e\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tcp: corrige el desplazamiento fuera de los l\u00edmites en dctcp_update_alpha(). En dctcp_update_alpha(), utilizamos un par\u00e1metro de m\u00f3dulo dctcp_shift_g de la siguiente manera: alpha -= min_not_zero(alpha, alpha \u0026gt;\u0026gt; dctcp_shift_g); ... entregado_ce \u0026lt;\u0026lt;= (10 - dctcp_shift_g); Parece que syzkaller comenz\u00f3 a modificar los par\u00e1metros del m\u00f3dulo y activ\u00f3 el desplazamiento fuera de los l\u00edmites [0] estableciendo 100 en dctcp_shift_g: memcpy((void*)0x20000080, \\\"/sys/module/tcp_dctcp/parameters/dctcp_shift_g\\\\000\\\", 47) ; res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x20000080ul, /*flags=*/2ul, /*mode=*/0ul); memcpy((void*)0x20000000, \\\"100\\\\000\\\", 4); syscall(__NR_write, /*fd=*/r[0], /*val=*/0x20000000ul, /*len=*/4ul); Limitemos el valor m\u00e1ximo de dctcp_shift_g mediante param_set_uint_minmax(). Con este parche: # echo 10 \u0026gt; /sys/module/tcp_dctcp/parameters/dctcp_shift_g # cat /sys/module/tcp_dctcp/parameters/dctcp_shift_g 10 # echo 11 \u0026gt; /sys/module/tcp_dctcp/parameters/dctcp_shift_g -bash: echo: error de escritura: argumento no v\u00e1lido [0]: UBSAN: desplazamiento fuera de los l\u00edmites en net/ipv4/tcp_dctcp.c:143:12 el exponente de desplazamiento 100 es demasiado grande para el tipo \u0027u32\u0027 de 32 bits (tambi\u00e9n conocido como \u0027int sin signo\u0027 ) CPU: 0 PID: 8083 Comm: syz-executor345 No contaminado 6.9.0-05151-g1b294a1f3561 #2 Nombre del hardware: PC est\u00e1ndar QEMU (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 01/04/2014 Seguimiento de llamadas:  __dump_stack lib/dump_stack.c:88 [en l\u00ednea] dump_stack_lvl+0x201/0x300 lib/dump_stack.c:114 ubsan_epilogue lib/ubsan.c:231 [en l\u00ednea] __ubsan_handle_shift_out_of_bounds+0x346/0x3a0 lib/ubsan.c :468 dctcp_update_alpha+0x540/0x570 net/ipv4/tcp_dctcp.c:143 tcp_in_ack_event net/ipv4/tcp_input.c:3802 [en l\u00ednea] tcp_ack+0x17b1/0x3bc0 net/ipv4/tcp_input.c:3948 v_state_process+0x57a/0x2290 neto/ ipv4/tcp_input.c:6711 tcp_v4_do_rcv+0x764/0xc40 net/ipv4/tcp_ipv4.c:1937 sk_backlog_rcv include/net/sock.h:1106 [en l\u00ednea] __release_sock+0x20f/0x350 net/core/sock.c:2983 release_sock+ 0x61/0x1f0 net/core/sock.c:3549 mptcp_subflow_shutdown+0x3d0/0x620 net/mptcp/protocol.c:2907 mptcp_check_send_data_fin+0x225/0x410 net/mptcp/protocol.c:2976 __mptcp_close+0x238/0x ad0 net/mptcp/protocolo .c:3072 mptcp_close+0x2a/0x1a0 net/mptcp/protocol.c:3127 inet_release+0x190/0x1f0 net/ipv4/af_inet.c:437 __sock_release net/socket.c:659 [en l\u00ednea] sock_close+0xc0/0x240 net/ socket.c:1421 __fput+0x41b/0x890 fs/file_table.c:422 task_work_run+0x23b/0x300 kernel/task_work.c:180 exit_task_work include/linux/task_work.h:38 [en l\u00ednea] do_exit+0x9c8/0x2540 kernel/exit .c:878 do_group_exit+0x201/0x2b0 kernel/exit.c:1027 __do_sys_exit_group kernel/exit.c:1038 [en l\u00ednea] __se_sys_exit_group kernel/exit.c:1036 [en l\u00ednea] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:10 36 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xe4/0x240 arch/x86/entry/common.c:83 Entry_SYSCALL_64_after_hwframe+0x67/0x6f RIP: 0033:0x7f6c2b5005b6 C\u00f3digo: no se puede acceder a los bytes del c\u00f3digo de operaci\u00f3n en 0x7f6c2b50058c . RSP: 002b:00007ffe883eb948 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007f6c2b5862f0 RCX: 00007f6c2b5005b6 RDX: 0000000001 RSI: 000000000000003c RDI: 0000000000000001 RBP: 0000000000000001 R08: 00000000000000e7 R09: ffffffffffffffc0 R10: 06 R11: 0000000000000246 R12: 00007f6c2b5862f0 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 \"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/02261d3f9dc7d1d7be7d778f839e3404ab99034c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/06d0fe049b51b0a92a70df8333fd85c4ba3eb2c6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/237340dee373b97833a491d2e99fcf1d4a9adafd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3ebc46ca8675de6378e3f8f40768e180bb8afa66\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6aacaa80d962f4916ccf90e2080306cec6c90fcf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8602150286a2a860a1dc55cbd04f99316f19b40a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e65d13ec00a738fa7661925fd5929ab3c765d4be\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e9b2f60636d18dfd0dd4965b3316f88dfd6a2b31\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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