ghsa-pw5g-24rm-mrgw
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
mptcp: prevent BPF accessing lowat from a subflow socket.
Alexei reported the following splat:
WARNING: CPU: 32 PID: 3276 at net/mptcp/subflow.c:1430 subflow_data_ready+0x147/0x1c0
Modules linked in: dummy bpf_testmod(O) [last unloaded: bpf_test_no_cfi(O)]
CPU: 32 PID: 3276 Comm: test_progs Tainted: GO 6.8.0-12873-g2c43c33bfd23
Call Trace:
The root cause of the issue is that bpf allows accessing mptcp-level proto_ops from a tcp subflow scope.
Fix the issue detecting the problematic call and preventing any action.
{ "affected": [], "aliases": [ "CVE-2024-35894" ], "database_specific": { "cwe_ids": [], "github_reviewed": false, "github_reviewed_at": null, "nvd_published_at": "2024-05-19T09:15:10Z", "severity": null }, "details": "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.", "id": "GHSA-pw5g-24rm-mrgw", "modified": "2024-08-12T15:30:47Z", "published": "2024-05-19T09:34:47Z", "references": [ { "type": "ADVISORY", "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-35894" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/3ffb1ab698376f09cc33101c07c1be229389fe29" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/ee3c845787b621cfe82c2e52c513024a9d7a78f5" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/fcf4692fa39e86a590c14a4af2de704e1d20a3b5" } ], "schema_version": "1.4.0", "severity": [] }