FKIE_CVE-2024-50038

Vulnerability from fkie_nvd - Published: 2024-10-21 20:15 - Updated: 2026-06-17 08:03
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: xtables: avoid NFPROTO_UNSPEC where needed syzbot managed to call xt_cluster match via ebtables: WARNING: CPU: 0 PID: 11 at net/netfilter/xt_cluster.c:72 xt_cluster_mt+0x196/0x780 [..] ebt_do_table+0x174b/0x2a40 Module registers to NFPROTO_UNSPEC, but it assumes ipv4/ipv6 packet processing. As this is only useful to restrict locally terminating TCP/UDP traffic, register this for ipv4 and ipv6 family only. Pablo points out that this is a general issue, direct users of the set/getsockopt interface can call into targets/matches that were only intended for use with ip(6)tables. Check all UNSPEC matches and targets for similar issues: - matches and targets are fine except if they assume skb_network_header() is valid -- this is only true when called from inet layer: ip(6) stack pulls the ip/ipv6 header into linear data area. - targets that return XT_CONTINUE or other xtables verdicts must be restricted too, they are incompatbile with the ebtables traverser, e.g. EBT_CONTINUE is a completely different value than XT_CONTINUE. Most matches/targets are changed to register for NFPROTO_IPV4/IPV6, as they are provided for use by ip(6)tables. The MARK target is also used by arptables, so register for NFPROTO_ARP too. While at it, bail out if connbytes fails to enable the corresponding conntrack family. This change passes the selftests in iptables.git.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0bfcb7b71e735560077a42847f69597ec7dcc326Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4cdc55ec6222bb195995cc58f7cb46e4d8907056Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/85ff9a0f793ca52c527e75cd40a69c948627ebdePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8f482bb7e27b37f1f734bb9a8eeb28b23d59d189Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/997f67d813ce0cf5eb3cdb8f124da68141e91b6cPatch
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.12
linux linux_kernel 6.12
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/xt_CHECKSUM.c",
            "net/netfilter/xt_CLASSIFY.c",
            "net/netfilter/xt_CONNSECMARK.c",
            "net/netfilter/xt_CT.c",
            "net/netfilter/xt_IDLETIMER.c",
            "net/netfilter/xt_LED.c",
            "net/netfilter/xt_NFLOG.c",
            "net/netfilter/xt_RATEEST.c",
            "net/netfilter/xt_SECMARK.c",
            "net/netfilter/xt_TRACE.c",
            "net/netfilter/xt_addrtype.c",
            "net/netfilter/xt_cluster.c",
            "net/netfilter/xt_connbytes.c",
            "net/netfilter/xt_connlimit.c",
            "net/netfilter/xt_connmark.c",
            "net/netfilter/xt_mark.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "85ff9a0f793ca52c527e75cd40a69c948627ebde",
              "status": "affected",
              "version": "0269ea4937343536ec7e85649932bc8c9686ea78",
              "versionType": "git"
            },
            {
              "lessThan": "8f482bb7e27b37f1f734bb9a8eeb28b23d59d189",
              "status": "affected",
              "version": "0269ea4937343536ec7e85649932bc8c9686ea78",
              "versionType": "git"
            },
            {
              "lessThan": "997f67d813ce0cf5eb3cdb8f124da68141e91b6c",
              "status": "affected",
              "version": "0269ea4937343536ec7e85649932bc8c9686ea78",
              "versionType": "git"
            },
            {
              "lessThan": "4cdc55ec6222bb195995cc58f7cb46e4d8907056",
              "status": "affected",
              "version": "0269ea4937343536ec7e85649932bc8c9686ea78",
              "versionType": "git"
            },
            {
              "lessThan": "0bfcb7b71e735560077a42847f69597ec7dcc326",
              "status": "affected",
              "version": "0269ea4937343536ec7e85649932bc8c9686ea78",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/xt_CHECKSUM.c",
            "net/netfilter/xt_CLASSIFY.c",
            "net/netfilter/xt_CONNSECMARK.c",
            "net/netfilter/xt_CT.c",
            "net/netfilter/xt_IDLETIMER.c",
            "net/netfilter/xt_LED.c",
            "net/netfilter/xt_NFLOG.c",
            "net/netfilter/xt_RATEEST.c",
            "net/netfilter/xt_SECMARK.c",
            "net/netfilter/xt_TRACE.c",
            "net/netfilter/xt_addrtype.c",
            "net/netfilter/xt_cluster.c",
            "net/netfilter/xt_connbytes.c",
            "net/netfilter/xt_connlimit.c",
            "net/netfilter/xt_connmark.c",
            "net/netfilter/xt_mark.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.30"
            },
            {
              "lessThan": "2.6.30",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.168",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.113",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.57",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.11.*",
              "status": "unaffected",
              "version": "6.11.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.12",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "B7B7108B-7220-433F-A168-6ECF9D7F65F3",
              "versionEndExcluding": "5.15.168",
              "versionStartIncluding": "2.6.30",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "D01BD22E-ACD1-4618-9D01-6116570BE1EE",
              "versionEndExcluding": "6.1.113",
              "versionStartIncluding": "5.16",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "05D83DB8-7465-4F88-AFB2-980011992AC1",
              "versionEndExcluding": "6.6.57",
              "versionStartIncluding": "6.2",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "AA84D336-CE9A-4535-B901-1AD77EC17C34",
              "versionEndExcluding": "6.11.4",
              "versionStartIncluding": "6.7",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "7F361E1D-580F-4A2D-A509-7615F73167A1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "925478D0-3E3D-4E6F-ACD5-09F28D5DF82C",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: xtables: avoid NFPROTO_UNSPEC where needed\n\nsyzbot managed to call xt_cluster match via ebtables:\n\n WARNING: CPU: 0 PID: 11 at net/netfilter/xt_cluster.c:72 xt_cluster_mt+0x196/0x780\n [..]\n ebt_do_table+0x174b/0x2a40\n\nModule registers to NFPROTO_UNSPEC, but it assumes ipv4/ipv6 packet\nprocessing.  As this is only useful to restrict locally terminating\nTCP/UDP traffic, register this for ipv4 and ipv6 family only.\n\nPablo points out that this is a general issue, direct users of the\nset/getsockopt interface can call into targets/matches that were only\nintended for use with ip(6)tables.\n\nCheck all UNSPEC matches and targets for similar issues:\n\n- matches and targets are fine except if they assume skb_network_header()\n  is valid -- this is only true when called from inet layer: ip(6) stack\n  pulls the ip/ipv6 header into linear data area.\n- targets that return XT_CONTINUE or other xtables verdicts must be\n  restricted too, they are incompatbile with the ebtables traverser, e.g.\n  EBT_CONTINUE is a completely different value than XT_CONTINUE.\n\nMost matches/targets are changed to register for NFPROTO_IPV4/IPV6, as\nthey are provided for use by ip(6)tables.\n\nThe MARK target is also used by arptables, so register for NFPROTO_ARP too.\n\nWhile at it, bail out if connbytes fails to enable the corresponding\nconntrack family.\n\nThis change passes the selftests in iptables.git."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: xtables: evita NFPROTO_UNSPEC donde sea necesario syzbot logr\u00f3 llamar a xt_cluster match a trav\u00e9s de ebtables: ADVERTENCIA: CPU: 0 PID: 11 en net/netfilter/xt_cluster.c:72 xt_cluster_mt+0x196/0x780 [..] ebt_do_table+0x174b/0x2a40 El m\u00f3dulo se registra en NFPROTO_UNSPEC, pero asume el procesamiento de paquetes ipv4/ipv6. Como esto solo es \u00fatil para restringir el tr\u00e1fico TCP/UDP que termina localmente, reg\u00edstrelo solo para la familia ipv4 e ipv6. Pablo se\u00f1ala que este es un problema general, los usuarios directos de la interfaz set/getsockopt pueden llamar a destinos/coincidencias que solo estaban destinados a usarse con tablas ip(6). Compruebe todas las coincidencias y objetivos UNSPEC para ver si hay problemas similares: - las coincidencias y los objetivos est\u00e1n bien excepto si asumen que skb_network_header() es v\u00e1lido - esto solo es cierto cuando se llama desde la capa inet: la pila ip(6) extrae el encabezado ip/ipv6 en el \u00e1rea de datos lineales. - los objetivos que devuelven XT_CONTINUE u otros veredictos de xtables tambi\u00e9n deben restringirse, son incompatibles con el traverser de ebtables, por ejemplo, EBT_CONTINUE es un valor completamente diferente de XT_CONTINUE. La mayor\u00eda de las coincidencias/objetivos se cambian para registrarse para NFPROTO_IPV4/IPV6, ya que se proporcionan para su uso por ip(6)tables. El objetivo MARK tambi\u00e9n lo usan arptables, as\u00ed que reg\u00edstrese tambi\u00e9n para NFPROTO_ARP. Mientras tanto, abandone si connbytes no puede habilitar la familia conntrack correspondiente. Este cambio pasa las autopruebas en iptables.git."
    }
  ],
  "id": "CVE-2024-50038",
  "lastModified": "2026-06-17T08:03:26.037",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-50038",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-10-22T13:25:10.359959Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-10-21T20:15:16.877",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/0bfcb7b71e735560077a42847f69597ec7dcc326"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/4cdc55ec6222bb195995cc58f7cb46e4d8907056"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/85ff9a0f793ca52c527e75cd40a69c948627ebde"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/8f482bb7e27b37f1f734bb9a8eeb28b23d59d189"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/997f67d813ce0cf5eb3cdb8f124da68141e91b6c"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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