ghsa-9r37-jj74-qvw9
Vulnerability from github
Published
2024-03-25 12:30
Modified
2025-03-13 21:31
Severity ?
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Details

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

net: dsa: mt7530: fix VLAN traffic leaks

PCR_MATRIX field was set to all 1's when VLAN filtering is enabled, but was not reset when it is disabled, which may cause traffic leaks:

ip link add br0 type bridge vlan_filtering 1
ip link add br1 type bridge vlan_filtering 1
ip link set swp0 master br0
ip link set swp1 master br1
ip link set br0 type bridge vlan_filtering 0
ip link set br1 type bridge vlan_filtering 0
# traffic in br0 and br1 will start leaking to each other

As port_bridge_{add,del} have set up PCR_MATRIX properly, remove the PCR_MATRIX write from mt7530_port_set_vlan_aware.

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{
  "affected": [],
  "aliases": [
    "CVE-2021-47160"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-03-25T10:15:08Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: mt7530: fix VLAN traffic leaks\n\nPCR_MATRIX field was set to all 1\u0027s when VLAN filtering is enabled, but\nwas not reset when it is disabled, which may cause traffic leaks:\n\n\tip link add br0 type bridge vlan_filtering 1\n\tip link add br1 type bridge vlan_filtering 1\n\tip link set swp0 master br0\n\tip link set swp1 master br1\n\tip link set br0 type bridge vlan_filtering 0\n\tip link set br1 type bridge vlan_filtering 0\n\t# traffic in br0 and br1 will start leaking to each other\n\nAs port_bridge_{add,del} have set up PCR_MATRIX properly, remove the\nPCR_MATRIX write from mt7530_port_set_vlan_aware.",
  "id": "GHSA-9r37-jj74-qvw9",
  "modified": "2025-03-13T21:31:02Z",
  "published": "2024-03-25T12:30:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47160"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/474a2ddaa192777522a7499784f1d60691cd831a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4fe4e1f48ba119bdbc7c897c83b04ba0d08f5488"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/82ae35b6c14feae5f216913d5b433e143c756d4e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ae389812733b1b1e8e07fcc238e41db166b5c78d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b91117b66fe875723a4e79ec6263526fffdb44d2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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