ghsa-28gp-589x-6r7f
Vulnerability from github
Published
2022-05-14 00:52
Modified
2022-05-14 00:52
Severity ?
4.4 (Medium) - CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Details

An issue was discovered in can_can_gw_rcv in net/can/gw.c in the Linux kernel through 4.19.13. The CAN frame modification rules allow bitwise logical operations that can be also applied to the can_dlc field. The privileged user "root" with CAP_NET_ADMIN can create a CAN frame modification rule that makes the data length code a higher value than the available CAN frame data size. In combination with a configured checksum calculation where the result is stored relatively to the end of the data (e.g. cgw_csum_xor_rel) the tail of the skb (e.g. frag_list pointer in skb_shared_info) can be rewritten which finally can cause a system crash. Because of a missing check, the CAN drivers may write arbitrary content beyond the data registers in the CAN controller's I/O memory when processing can-gw manipulated outgoing frames.

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{
  "affected": [],
  "aliases": [
    "CVE-2019-3701"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-787"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-01-03T16:29:00Z",
    "severity": "MODERATE"
  },
  "details": "An issue was discovered in can_can_gw_rcv in net/can/gw.c in the Linux kernel through 4.19.13. The CAN frame modification rules allow bitwise logical operations that can be also applied to the can_dlc field. The privileged user \"root\" with CAP_NET_ADMIN can create a CAN frame modification rule that makes the data length code a higher value than the available CAN frame data size. In combination with a configured checksum calculation where the result is stored relatively to the end of the data (e.g. cgw_csum_xor_rel) the tail of the skb (e.g. frag_list pointer in skb_shared_info) can be rewritten which finally can cause a system crash. Because of a missing check, the CAN drivers may write arbitrary content beyond the data registers in the CAN controller\u0027s I/O memory when processing can-gw manipulated outgoing frames.",
  "id": "GHSA-28gp-589x-6r7f",
  "modified": "2022-05-14T00:52:08Z",
  "published": "2022-05-14T00:52:08Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-3701"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.suse.com/show_bug.cgi?id=1120386"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=0aaa81377c5a01f686bcdb8c7a6929a7bf330c68"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2019/05/msg00002.html"
    },
    {
      "type": "WEB",
      "url": "https://marc.info/?l=linux-netdev\u0026m=154651842302479\u0026w=2"
    },
    {
      "type": "WEB",
      "url": "https://marc.info/?l=linux-netdev\u0026m=154661373531512\u0026w=2"
    },
    {
      "type": "WEB",
      "url": "https://support.f5.com/csp/article/K17957133"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3932-1"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3932-2"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/4115-1"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/4118-1"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00035.html"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/106443"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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