cve-2024-35894
Vulnerability from cvelistv5
Published
2024-05-19 08:34
Modified
2024-08-11 12:45
Severity
Summary
mptcp: prevent BPF accessing lowat from a subflow socket.
References
SourceURLTags
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3ffb1ab698376f09cc33101c07c1be229389fe29
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ee3c845787b621cfe82c2e52c513024a9d7a78f5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fcf4692fa39e86a590c14a4af2de704e1d20a3b5
Impacted products
VendorProduct
LinuxLinux
LinuxLinux
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                "timestamp": "2024-05-23T17:19:11.932851Z",
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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        "title": "CISA ADP Vulnrichment"
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        "title": "CVE Program Container"
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    "cna": {
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          "programFiles": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: prevent BPF accessing lowat from a subflow socket.\n\nAlexei reported the following splat:\n\n WARNING: CPU: 32 PID: 3276 at net/mptcp/subflow.c:1430 subflow_data_ready+0x147/0x1c0\n Modules linked in: dummy bpf_testmod(O) [last unloaded: bpf_test_no_cfi(O)]\n CPU: 32 PID: 3276 Comm: test_progs Tainted: GO       6.8.0-12873-g2c43c33bfd23\n Call Trace:\n  \u003cTASK\u003e\n  mptcp_set_rcvlowat+0x79/0x1d0\n  sk_setsockopt+0x6c0/0x1540\n  __bpf_setsockopt+0x6f/0x90\n  bpf_sock_ops_setsockopt+0x3c/0x90\n  bpf_prog_509ce5db2c7f9981_bpf_test_sockopt_int+0xb4/0x11b\n  bpf_prog_dce07e362d941d2b_bpf_test_socket_sockopt+0x12b/0x132\n  bpf_prog_348c9b5faaf10092_skops_sockopt+0x954/0xe86\n  __cgroup_bpf_run_filter_sock_ops+0xbc/0x250\n  tcp_connect+0x879/0x1160\n  tcp_v6_connect+0x50c/0x870\n  mptcp_connect+0x129/0x280\n  __inet_stream_connect+0xce/0x370\n  inet_stream_connect+0x36/0x50\n  bpf_trampoline_6442491565+0x49/0xef\n  inet_stream_connect+0x5/0x50\n  __sys_connect+0x63/0x90\n  __x64_sys_connect+0x14/0x20\n\nThe root cause of the issue is that bpf allows accessing mptcp-level\nproto_ops from a tcp subflow scope.\n\nFix the issue detecting the problematic call and preventing any action."
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      "title": "mptcp: prevent BPF accessing lowat from a subflow socket.",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2024-35894",
    "datePublished": "2024-05-19T08:34:49.504Z",
    "dateReserved": "2024-05-17T13:50:33.113Z",
    "dateUpdated": "2024-08-11T12:45:46.685Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-35894\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-19T09:15:10.397\",\"lastModified\":\"2024-08-12T13:38:21.393\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmptcp: prevent BPF accessing lowat from a subflow socket.\\n\\nAlexei reported the following splat:\\n\\n WARNING: CPU: 32 PID: 3276 at net/mptcp/subflow.c:1430 subflow_data_ready+0x147/0x1c0\\n Modules linked in: dummy bpf_testmod(O) [last unloaded: bpf_test_no_cfi(O)]\\n CPU: 32 PID: 3276 Comm: test_progs Tainted: GO       6.8.0-12873-g2c43c33bfd23\\n Call Trace:\\n  \u003cTASK\u003e\\n  mptcp_set_rcvlowat+0x79/0x1d0\\n  sk_setsockopt+0x6c0/0x1540\\n  __bpf_setsockopt+0x6f/0x90\\n  bpf_sock_ops_setsockopt+0x3c/0x90\\n  bpf_prog_509ce5db2c7f9981_bpf_test_sockopt_int+0xb4/0x11b\\n  bpf_prog_dce07e362d941d2b_bpf_test_socket_sockopt+0x12b/0x132\\n  bpf_prog_348c9b5faaf10092_skops_sockopt+0x954/0xe86\\n  __cgroup_bpf_run_filter_sock_ops+0xbc/0x250\\n  tcp_connect+0x879/0x1160\\n  tcp_v6_connect+0x50c/0x870\\n  mptcp_connect+0x129/0x280\\n  __inet_stream_connect+0xce/0x370\\n  inet_stream_connect+0x36/0x50\\n  bpf_trampoline_6442491565+0x49/0xef\\n  inet_stream_connect+0x5/0x50\\n  __sys_connect+0x63/0x90\\n  __x64_sys_connect+0x14/0x20\\n\\nThe root cause of the issue is that bpf allows accessing mptcp-level\\nproto_ops from a tcp subflow scope.\\n\\nFix the issue detecting the problematic call and preventing any action.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: mptcp: impide que BPF acceda a lowat desde un socket de subflujo. Alexei inform\u00f3 el siguiente s\u00edmbolo: ADVERTENCIA: CPU: 32 PID: 3276 en net/mptcp/subflow.c:1430 subflow_data_ready+0x147/0x1c0 M\u00f3dulos vinculados en: ficticio bpf_testmod(O) [\u00faltima descarga: bpf_test_no_cfi(O)] CPU: 32 PID: 3276 Comunicaciones: test_progs Contaminado: GO 6.8.0-12873-g2c43c33bfd23 Seguimiento de llamadas:  mptcp_set_rcvlowat+0x79/0x1d0 sk_setsockopt+0x6c0/0x1540 __bpf_setsockopt+0x6f/0x90 ock_ops_setsockopt+0x3c/0x90 bpf_prog_509ce5db2c7f9981_bpf_test_sockopt_int+0xb4/0x11b bpf_prog_dce07e362d941d2b_bpf_test_socket_sockopt+0x12b /0x132 bpf_prog_348c9b5faaf10092_skops_sockopt+0x954/0xe86 __cgroup_bpf_run_filter_sock_ops+0xbc/0x250 tcp_connect+0x879/0x1160 tcp_v6_connect+0x50c/0x870 x129/0x280 __inet_stream_connect+0xce/0x370 inet_stream_connect+0x36/0x50 bpf_trampoline_6442491565+0x49/0xef inet_stream_connect+0x5/0x50 __sys_connect+0x63 /0x90 __x64_sys_connect+0x14/0x20 La causa principal del problema es que bpf permite acceder a proto_ops de nivel mptcp desde un alcance de subflujo tcp. Solucione el problema al detectar la llamada problem\u00e1tica y evitar cualquier acci\u00f3n.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3ffb1ab698376f09cc33101c07c1be229389fe29\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ee3c845787b621cfe82c2e52c513024a9d7a78f5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fcf4692fa39e86a590c14a4af2de704e1d20a3b5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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