ghsa-359q-r4g4-7qxp
Vulnerability from github
Published
2024-06-21 12:31
Modified
2024-07-29 09:36
Details

In the Linux kernel, the following vulnerability has been resolved:

net: relax socket state check at accept time.

Christoph reported the following splat:

WARNING: CPU: 1 PID: 772 at net/ipv4/af_inet.c:761 __inet_accept+0x1f4/0x4a0 Modules linked in: CPU: 1 PID: 772 Comm: syz-executor510 Not tainted 6.9.0-rc7-g7da7119fe22b #56 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.0-2.el7 04/01/2014 RIP: 0010:__inet_accept+0x1f4/0x4a0 net/ipv4/af_inet.c:759 Code: 04 38 84 c0 0f 85 87 00 00 00 41 c7 04 24 03 00 00 00 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 ec b7 da fd <0f> 0b e9 7f fe ff ff e8 e0 b7 da fd 0f 0b e9 fe fe ff ff 89 d9 80 RSP: 0018:ffffc90000c2fc58 EFLAGS: 00010293 RAX: ffffffff836bdd14 RBX: 0000000000000000 RCX: ffff888104668000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: dffffc0000000000 R08: ffffffff836bdb89 R09: fffff52000185f64 R10: dffffc0000000000 R11: fffff52000185f64 R12: dffffc0000000000 R13: 1ffff92000185f98 R14: ffff88810754d880 R15: ffff8881007b7800 FS: 000000001c772880(0000) GS:ffff88811b280000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb9fcf2e178 CR3: 00000001045d2002 CR4: 0000000000770ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: inet_accept+0x138/0x1d0 net/ipv4/af_inet.c:786 do_accept+0x435/0x620 net/socket.c:1929 __sys_accept4_file net/socket.c:1969 [inline] __sys_accept4+0x9b/0x110 net/socket.c:1999 __do_sys_accept net/socket.c:2016 [inline] __se_sys_accept net/socket.c:2013 [inline] __x64_sys_accept+0x7d/0x90 net/socket.c:2013 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x58/0x100 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x4315f9 Code: fd ff 48 81 c4 80 00 00 00 e9 f1 fe ff ff 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 ab b4 fd ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffdb26d9c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002b RAX: ffffffffffffffda RBX: 0000000000400300 RCX: 00000000004315f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00000000006e1018 R08: 0000000000400300 R09: 0000000000400300 R10: 0000000000400300 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000040cdf0 R14: 000000000040ce80 R15: 0000000000000055

The reproducer invokes shutdown() before entering the listener status. After commit 94062790aedb ("tcp: defer shutdown(SEND_SHUTDOWN) for TCP_SYN_RECV sockets"), the above causes the child to reach the accept syscall in FIN_WAIT1 status.

Eric noted we can relax the existing assertion in __inet_accept()

Show details on source website

To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2024-36484"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-06-21T11:15:10Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: relax socket state check at accept time.\n\nChristoph reported the following splat:\n\nWARNING: CPU: 1 PID: 772 at net/ipv4/af_inet.c:761 __inet_accept+0x1f4/0x4a0\nModules linked in:\nCPU: 1 PID: 772 Comm: syz-executor510 Not tainted 6.9.0-rc7-g7da7119fe22b #56\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.0-2.el7 04/01/2014\nRIP: 0010:__inet_accept+0x1f4/0x4a0 net/ipv4/af_inet.c:759\nCode: 04 38 84 c0 0f 85 87 00 00 00 41 c7 04 24 03 00 00 00 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 ec b7 da fd \u003c0f\u003e 0b e9 7f fe ff ff e8 e0 b7 da fd 0f 0b e9 fe fe ff ff 89 d9 80\nRSP: 0018:ffffc90000c2fc58 EFLAGS: 00010293\nRAX: ffffffff836bdd14 RBX: 0000000000000000 RCX: ffff888104668000\nRDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000\nRBP: dffffc0000000000 R08: ffffffff836bdb89 R09: fffff52000185f64\nR10: dffffc0000000000 R11: fffff52000185f64 R12: dffffc0000000000\nR13: 1ffff92000185f98 R14: ffff88810754d880 R15: ffff8881007b7800\nFS:  000000001c772880(0000) GS:ffff88811b280000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007fb9fcf2e178 CR3: 00000001045d2002 CR4: 0000000000770ef0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nPKRU: 55555554\nCall Trace:\n \u003cTASK\u003e\n inet_accept+0x138/0x1d0 net/ipv4/af_inet.c:786\n do_accept+0x435/0x620 net/socket.c:1929\n __sys_accept4_file net/socket.c:1969 [inline]\n __sys_accept4+0x9b/0x110 net/socket.c:1999\n __do_sys_accept net/socket.c:2016 [inline]\n __se_sys_accept net/socket.c:2013 [inline]\n __x64_sys_accept+0x7d/0x90 net/socket.c:2013\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0x58/0x100 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\nRIP: 0033:0x4315f9\nCode: fd ff 48 81 c4 80 00 00 00 e9 f1 fe ff ff 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 0f 83 ab b4 fd ff c3 66 2e 0f 1f 84 00 00 00 00\nRSP: 002b:00007ffdb26d9c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002b\nRAX: ffffffffffffffda RBX: 0000000000400300 RCX: 00000000004315f9\nRDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004\nRBP: 00000000006e1018 R08: 0000000000400300 R09: 0000000000400300\nR10: 0000000000400300 R11: 0000000000000246 R12: 0000000000000000\nR13: 000000000040cdf0 R14: 000000000040ce80 R15: 0000000000000055\n \u003c/TASK\u003e\n\nThe reproducer invokes shutdown() before entering the listener status.\nAfter commit 94062790aedb (\"tcp: defer shutdown(SEND_SHUTDOWN) for\nTCP_SYN_RECV sockets\"), the above causes the child to reach the accept\nsyscall in FIN_WAIT1 status.\n\nEric noted we can relax the existing assertion in __inet_accept()",
  "id": "GHSA-359q-r4g4-7qxp",
  "modified": "2024-07-29T09:36:13Z",
  "published": "2024-06-21T12:31:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-36484"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/21c14c556cccd0cb54b71ec5e901e64ba84c7165"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/26afda78cda3da974fd4c287962c169e9462c495"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/59801e88c99f7c3f44a4d20af6ba6417aa359b5d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5f9a04a94fd1894d7009055ab8e5832a0242dba3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6e03006548c66b979f4e5e9fc797aac4dad82822"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7de00adc9bd035d861ba4177848ca0bfa5ed1e04"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/87bdc9f6f58b4417362d6932b49b828e319f97dc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c09ddc605893df542c6cf8dde6a57a93f7cf0adb"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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