fkie_cve-2021-47309
Vulnerability from fkie_nvd
Published
2024-05-21 15:15
Modified
2024-12-26 18:44
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: validate lwtstate->data before returning from skb_tunnel_info() skb_tunnel_info() returns pointer of lwtstate->data as ip_tunnel_info type without validation. lwtstate->data can have various types such as mpls_iptunnel_encap, etc and these are not compatible. So skb_tunnel_info() should validate before returning that pointer. Splat looks like: BUG: KASAN: slab-out-of-bounds in vxlan_get_route+0x418/0x4b0 [vxlan] Read of size 2 at addr ffff888106ec2698 by task ping/811 CPU: 1 PID: 811 Comm: ping Not tainted 5.13.0+ #1195 Call Trace: dump_stack_lvl+0x56/0x7b print_address_description.constprop.8.cold.13+0x13/0x2ee ? vxlan_get_route+0x418/0x4b0 [vxlan] ? vxlan_get_route+0x418/0x4b0 [vxlan] kasan_report.cold.14+0x83/0xdf ? vxlan_get_route+0x418/0x4b0 [vxlan] vxlan_get_route+0x418/0x4b0 [vxlan] [ ... ] vxlan_xmit_one+0x148b/0x32b0 [vxlan] [ ... ] vxlan_xmit+0x25c5/0x4780 [vxlan] [ ... ] dev_hard_start_xmit+0x1ae/0x6e0 __dev_queue_xmit+0x1f39/0x31a0 [ ... ] neigh_xmit+0x2f9/0x940 mpls_xmit+0x911/0x1600 [mpls_iptunnel] lwtunnel_xmit+0x18f/0x450 ip_finish_output2+0x867/0x2040 [ ... ]
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2179d96ec702cc33ead02a9ce40ece599b8538c5Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/67a9c94317402b826fc3db32afc8f39336803d97Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/83bdcfbd968bcc91a0632b7b625e4a9b0cba5e0dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8aa13a86964cdec4fd969ef677c6614ff068641aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8bb1589c89e61e3b182dd546f1021928ebb5c2a6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a915379594f1e045421635c6316d8f3ffa018c58Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b61d327cd3cc5ea591f3bf751dd11e034f388bb5Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e7f3c9df40515a6c6b46f36c4c94cf48a043f887Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/2179d96ec702cc33ead02a9ce40ece599b8538c5Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/67a9c94317402b826fc3db32afc8f39336803d97Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/83bdcfbd968bcc91a0632b7b625e4a9b0cba5e0dPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8aa13a86964cdec4fd969ef677c6614ff068641aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8bb1589c89e61e3b182dd546f1021928ebb5c2a6Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/a915379594f1e045421635c6316d8f3ffa018c58Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b61d327cd3cc5ea591f3bf751dd11e034f388bb5Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/e7f3c9df40515a6c6b46f36c4c94cf48a043f887Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 5.14


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "5A6521A3-1CD2-4EFB-B365-323A55C98EE5",
              "versionEndExcluding": "4.4.277",
              "versionStartIncluding": "4.3",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "B543C082-5612-489A-A957-B7F2B8822025",
              "versionEndExcluding": "4.9.277",
              "versionStartIncluding": "4.5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6A796929-CDBE-45AF-BD44-F357F64AFFCA",
              "versionEndExcluding": "4.14.241",
              "versionStartIncluding": "4.10",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "D1C5B0E1-06E7-4615-AA17-02585202D86E",
              "versionEndExcluding": "4.19.199",
              "versionStartIncluding": "4.15",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "3EF7BA79-262D-4A55-A0A1-E0D0BCA7C320",
              "versionEndExcluding": "5.4.135",
              "versionStartIncluding": "4.20",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "08E2D438-D50E-43C5-AF10-D62FE49B5815",
              "versionEndExcluding": "5.10.53",
              "versionStartIncluding": "5.5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "808DF8D9-4913-4CC7-B91F-B4146556B7ED",
              "versionEndExcluding": "5.13.5",
              "versionStartIncluding": "5.11",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.14:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "71268287-21A8-4488-AA4F-23C473153131",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: validate lwtstate-\u003edata before returning from skb_tunnel_info()\n\nskb_tunnel_info() returns pointer of lwtstate-\u003edata as ip_tunnel_info\ntype without validation. lwtstate-\u003edata can have various types such as\nmpls_iptunnel_encap, etc and these are not compatible.\nSo skb_tunnel_info() should validate before returning that pointer.\n\nSplat looks like:\nBUG: KASAN: slab-out-of-bounds in vxlan_get_route+0x418/0x4b0 [vxlan]\nRead of size 2 at addr ffff888106ec2698 by task ping/811\n\nCPU: 1 PID: 811 Comm: ping Not tainted 5.13.0+ #1195\nCall Trace:\n dump_stack_lvl+0x56/0x7b\n print_address_description.constprop.8.cold.13+0x13/0x2ee\n ? vxlan_get_route+0x418/0x4b0 [vxlan]\n ? vxlan_get_route+0x418/0x4b0 [vxlan]\n kasan_report.cold.14+0x83/0xdf\n ? vxlan_get_route+0x418/0x4b0 [vxlan]\n vxlan_get_route+0x418/0x4b0 [vxlan]\n [ ... ]\n vxlan_xmit_one+0x148b/0x32b0 [vxlan]\n [ ... ]\n vxlan_xmit+0x25c5/0x4780 [vxlan]\n [ ... ]\n dev_hard_start_xmit+0x1ae/0x6e0\n __dev_queue_xmit+0x1f39/0x31a0\n [ ... ]\n neigh_xmit+0x2f9/0x940\n mpls_xmit+0x911/0x1600 [mpls_iptunnel]\n lwtunnel_xmit+0x18f/0x450\n ip_finish_output2+0x867/0x2040\n [ ... ]"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: net: validar lwtstate-\u0026gt;data antes de regresar de skb_tunnel_info() skb_tunnel_info() devuelve un puntero de lwtstate-\u0026gt;data como tipo ip_tunnel_info sin validaci\u00f3n. lwtstate-\u0026gt;data puede tener varios tipos como mpls_iptunnel_encap, etc. y estos no son compatibles. Entonces skb_tunnel_info() deber\u00eda validarse antes de devolver ese puntero. Splat se ve as\u00ed: BUG: KASAN: slab fuera de los l\u00edmites en vxlan_get_route+0x418/0x4b0 [vxlan] Lectura de tama\u00f1o 2 en la direcci\u00f3n ffff888106ec2698 mediante tarea ping/811 CPU: 1 PID: 811 Comm: ping No contaminado 5.13.0 + #1195 Seguimiento de llamadas: dump_stack_lvl+0x56/0x7b print_address_description.constprop.8.cold.13+0x13/0x2ee? vxlan_get_route+0x418/0x4b0 [vxlan] ? vxlan_get_route+0x418/0x4b0 [vxlan] kasan_report.cold.14+0x83/0xdf? vxlan_get_route+0x418/0x4b0 [vxlan] vxlan_get_route+0x418/0x4b0 [vxlan] [ ... ] vxlan_xmit_one+0x148b/0x32b0 [vxlan] [ ... ] vxlan_xmit+0x25c5/0x4780 [vxlan] [ ... ] +0x1ae /0x6e0 __dev_queue_xmit+0x1f39/0x31a0 [...] veck_xMit+0x2f9/0x940 mpls_xmit+0x911/0x1600 [mpls_iptunnel] lwtunnel_xmit+0x18f/0x450 ip_finish_output2+0x20467/0x2040"
    }
  ],
  "id": "CVE-2021-47309",
  "lastModified": "2024-12-26T18:44:48.667",
  "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": "2024-05-21T15:15:18.453",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/2179d96ec702cc33ead02a9ce40ece599b8538c5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/67a9c94317402b826fc3db32afc8f39336803d97"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/83bdcfbd968bcc91a0632b7b625e4a9b0cba5e0d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      ],
      "url": "https://git.kernel.org/stable/c/8aa13a86964cdec4fd969ef677c6614ff068641a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/8bb1589c89e61e3b182dd546f1021928ebb5c2a6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      ],
      "url": "https://git.kernel.org/stable/c/a915379594f1e045421635c6316d8f3ffa018c58"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      ],
      "url": "https://git.kernel.org/stable/c/b61d327cd3cc5ea591f3bf751dd11e034f388bb5"
    },
    {
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    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
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    },
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    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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