ghsa-gp53-q766-mxq2
Vulnerability from github
Published
2024-10-21 21:30
Modified
2024-10-25 21:31
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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

Bluetooth: L2CAP: Fix u8 overflow

By keep sending L2CAP_CONF_REQ packets, chan->num_conf_rsp increases multiple times and eventually it will wrap around the maximum number (i.e., 255). This patch prevents this by adding a boundary check with L2CAP_MAX_CONF_RSP

Btmon log: Bluetooth monitor ver 5.64 = Note: Linux version 6.1.0-rc2 (x86_64) 0.264594 = Note: Bluetooth subsystem version 2.22 0.264636 @ MGMT Open: btmon (privileged) version 1.22 {0x0001} 0.272191 = New Index: 00:00:00:00:00:00 (Primary,Virtual,hci0) [hci0] 13.877604 @ RAW Open: 9496 (privileged) version 2.22 {0x0002} 13.890741 = Open Index: 00:00:00:00:00:00 [hci0] 13.900426 (...)

ACL Data RX: Handle 200 flags 0x00 dlen 1033 #32 [hci0] 14.273106 invalid packet size (12 != 1033) 08 00 01 00 02 01 04 00 01 10 ff ff ............ ACL Data RX: Handle 200 flags 0x00 dlen 1547 #33 [hci0] 14.273561 invalid packet size (14 != 1547) 0a 00 01 00 04 01 06 00 40 00 00 00 00 00 ........@..... ACL Data RX: Handle 200 flags 0x00 dlen 2061 #34 [hci0] 14.274390 invalid packet size (16 != 2061) 0c 00 01 00 04 01 08 00 40 00 00 00 00 00 00 04 ........@....... ACL Data RX: Handle 200 flags 0x00 dlen 2061 #35 [hci0] 14.274932 invalid packet size (16 != 2061) 0c 00 01 00 04 01 08 00 40 00 00 00 07 00 03 00 ........@....... = bluetoothd: Bluetooth daemon 5.43 14.401828 ACL Data RX: Handle 200 flags 0x00 dlen 1033 #36 [hci0] 14.275753 invalid packet size (12 != 1033) 08 00 01 00 04 01 04 00 40 00 00 00 ........@...

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{
  "affected": [],
  "aliases": [
    "CVE-2022-48947"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-190"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-10-21T20:15:06Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix u8 overflow\n\nBy keep sending L2CAP_CONF_REQ packets, chan-\u003enum_conf_rsp increases\nmultiple times and eventually it will wrap around the maximum number\n(i.e., 255).\nThis patch prevents this by adding a boundary check with\nL2CAP_MAX_CONF_RSP\n\nBtmon log:\nBluetooth monitor ver 5.64\n= Note: Linux version 6.1.0-rc2 (x86_64)                               0.264594\n= Note: Bluetooth subsystem version 2.22                               0.264636\n@ MGMT Open: btmon (privileged) version 1.22                  {0x0001} 0.272191\n= New Index: 00:00:00:00:00:00 (Primary,Virtual,hci0)          [hci0] 13.877604\n@ RAW Open: 9496 (privileged) version 2.22                   {0x0002} 13.890741\n= Open Index: 00:00:00:00:00:00                                [hci0] 13.900426\n(...)\n\u003e ACL Data RX: Handle 200 flags 0x00 dlen 1033             #32 [hci0] 14.273106\n        invalid packet size (12 != 1033)\n        08 00 01 00 02 01 04 00 01 10 ff ff              ............\n\u003e ACL Data RX: Handle 200 flags 0x00 dlen 1547             #33 [hci0] 14.273561\n        invalid packet size (14 != 1547)\n        0a 00 01 00 04 01 06 00 40 00 00 00 00 00        ........@.....\n\u003e ACL Data RX: Handle 200 flags 0x00 dlen 2061             #34 [hci0] 14.274390\n        invalid packet size (16 != 2061)\n        0c 00 01 00 04 01 08 00 40 00 00 00 00 00 00 04  ........@.......\n\u003e ACL Data RX: Handle 200 flags 0x00 dlen 2061             #35 [hci0] 14.274932\n        invalid packet size (16 != 2061)\n        0c 00 01 00 04 01 08 00 40 00 00 00 07 00 03 00  ........@.......\n= bluetoothd: Bluetooth daemon 5.43                                   14.401828\n\u003e ACL Data RX: Handle 200 flags 0x00 dlen 1033             #36 [hci0] 14.275753\n        invalid packet size (12 != 1033)\n        08 00 01 00 04 01 04 00 40 00 00 00              ........@...",
  "id": "GHSA-gp53-q766-mxq2",
  "modified": "2024-10-25T21:31:26Z",
  "published": "2024-10-21T21:30:50Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-48947"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/19a78143961a197de8502f4f29c453b913dc3c29"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/49d5867819ab7c744852b45509e8469839c07e0e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5550bbf709c323194881737fd290c4bada9e6ead"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/95f1847a361c7b4bf7d74c06ecb6968455082c1a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9fdc79b571434af7bc742da40a3405f038b637a7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ad528fde0702903208d0a79d88d5a42ae3fc235b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bcd70260ef56e0aee8a4fc6cd214a419900b0765"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f3fe6817156a2ad4b06f01afab04638a34d7c9a6"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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