fkie_cve-2021-47160
Vulnerability from fkie_nvd
Published
2024-03-25 10:15
Modified
2025-03-13 21:24
Severity ?
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/474a2ddaa192777522a7499784f1d60691cd831aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4fe4e1f48ba119bdbc7c897c83b04ba0d08f5488Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/82ae35b6c14feae5f216913d5b433e143c756d4ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ae389812733b1b1e8e07fcc238e41db166b5c78dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b91117b66fe875723a4e79ec6263526fffdb44d2Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/474a2ddaa192777522a7499784f1d60691cd831aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/4fe4e1f48ba119bdbc7c897c83b04ba0d08f5488Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/82ae35b6c14feae5f216913d5b433e143c756d4ePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ae389812733b1b1e8e07fcc238e41db166b5c78dPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b91117b66fe875723a4e79ec6263526fffdb44d2Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 5.13
linux linux_kernel 5.13
linux linux_kernel 5.13


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
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              "matchCriteriaId": "500F0F79-3117-4D09-AA90-639C7FA64175",
              "versionEndExcluding": "4.19.193",
              "versionStartIncluding": "4.16",
              "vulnerable": true
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              "matchCriteriaId": "96AC23B2-D46A-49D9-8203-8E1BEDCA8532",
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          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: net: dsa: mt7530: corregir fugas de tr\u00e1fico de VLAN El campo PCR_MATRIX se configur\u00f3 en todos 1 cuando el filtrado de VLAN est\u00e1 habilitado, pero no se restableci\u00f3 cuando est\u00e1 deshabilitado, lo que puede causar fugas de tr\u00e1fico: enlace ip agregar puente tipo br0 vlan_filtering 1 enlace ip agregar puente tipo br1 vlan_filtering 1 conjunto de enlaces ip swp0 master br0 conjunto de enlaces ip swp1 maestro br1 conjunto de enlaces ip br0 puente tipo vlan_filtering 0 conjunto de enlaces ip br1 tipo puente vlan_filtering 0 # tr\u00e1fico en br0 y br1 comenzar\u00e1n a filtrarse entre s\u00ed. Como port_bridge_{add,del} ha configurado PCR_MATRIX correctamente, elimine la escritura PCR_MATRIX de mt7530_port_set_vlan_aware."
    }
  ],
  "id": "CVE-2021-47160",
  "lastModified": "2025-03-13T21:24:02.300",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.2,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-03-25T10:15:08.377",
  "references": [
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      "url": "https://git.kernel.org/stable/c/b91117b66fe875723a4e79ec6263526fffdb44d2"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/474a2ddaa192777522a7499784f1d60691cd831a"
    },
    {
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      "url": "https://git.kernel.org/stable/c/4fe4e1f48ba119bdbc7c897c83b04ba0d08f5488"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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