CVE-2024-50038 (GCVE-0-2024-50038)

Vulnerability from cvelistv5 – Published: 2024-10-21 19:39 – Updated: 2026-05-11 20:44
VLAI
Title
netfilter: xtables: avoid NFPROTO_UNSPEC where needed
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.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 0269ea4937343536ec7e85649932bc8c9686ea78 , < 85ff9a0f793ca52c527e75cd40a69c948627ebde (git)
Affected: 0269ea4937343536ec7e85649932bc8c9686ea78 , < 8f482bb7e27b37f1f734bb9a8eeb28b23d59d189 (git)
Affected: 0269ea4937343536ec7e85649932bc8c9686ea78 , < 997f67d813ce0cf5eb3cdb8f124da68141e91b6c (git)
Affected: 0269ea4937343536ec7e85649932bc8c9686ea78 , < 4cdc55ec6222bb195995cc58f7cb46e4d8907056 (git)
Affected: 0269ea4937343536ec7e85649932bc8c9686ea78 , < 0bfcb7b71e735560077a42847f69597ec7dcc326 (git)
Create a notification for this product.
Linux Linux Affected: 2.6.30
Unaffected: 0 , < 2.6.30 (semver)
Unaffected: 5.15.168 , ≤ 5.15.* (semver)
Unaffected: 6.1.113 , ≤ 6.1.* (semver)
Unaffected: 6.6.57 , ≤ 6.6.* (semver)
Unaffected: 6.11.4 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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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.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"2.6.30\",\"versionEndExcluding\":\"5.15.168\",\"matchCriteriaId\":\"B7B7108B-7220-433F-A168-6ECF9D7F65F3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.113\",\"matchCriteriaId\":\"D01BD22E-ACD1-4618-9D01-6116570BE1EE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.57\",\"matchCriteriaId\":\"05D83DB8-7465-4F88-AFB2-980011992AC1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.11.4\",\"matchCriteriaId\":\"AA84D336-CE9A-4535-B901-1AD77EC17C34\"},{\"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\"}]}]}],\"references\":[{\"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\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-03T22:24:43.902Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-50038\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-10-22T13:25:10.359959Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-10-22T13:25:13.522Z\"}}], \"cna\": {\"title\": \"netfilter: xtables: avoid NFPROTO_UNSPEC where needed\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"0269ea4937343536ec7e85649932bc8c9686ea78\", \"lessThan\": \"85ff9a0f793ca52c527e75cd40a69c948627ebde\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0269ea4937343536ec7e85649932bc8c9686ea78\", \"lessThan\": \"8f482bb7e27b37f1f734bb9a8eeb28b23d59d189\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0269ea4937343536ec7e85649932bc8c9686ea78\", \"lessThan\": \"997f67d813ce0cf5eb3cdb8f124da68141e91b6c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0269ea4937343536ec7e85649932bc8c9686ea78\", \"lessThan\": \"4cdc55ec6222bb195995cc58f7cb46e4d8907056\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0269ea4937343536ec7e85649932bc8c9686ea78\", \"lessThan\": \"0bfcb7b71e735560077a42847f69597ec7dcc326\", \"versionType\": \"git\"}], \"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\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.30\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.30\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.15.168\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.113\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.57\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11.4\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.11.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"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\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/85ff9a0f793ca52c527e75cd40a69c948627ebde\"}, {\"url\": \"https://git.kernel.org/stable/c/8f482bb7e27b37f1f734bb9a8eeb28b23d59d189\"}, {\"url\": \"https://git.kernel.org/stable/c/997f67d813ce0cf5eb3cdb8f124da68141e91b6c\"}, {\"url\": \"https://git.kernel.org/stable/c/4cdc55ec6222bb195995cc58f7cb46e4d8907056\"}, {\"url\": \"https://git.kernel.org/stable/c/0bfcb7b71e735560077a42847f69597ec7dcc326\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"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.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.168\", \"versionStartIncluding\": \"2.6.30\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.113\", \"versionStartIncluding\": \"2.6.30\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.57\", \"versionStartIncluding\": \"2.6.30\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11.4\", \"versionStartIncluding\": \"2.6.30\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12\", \"versionStartIncluding\": \"2.6.30\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T09:44:25.094Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-50038\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-03T22:24:43.902Z\", \"dateReserved\": \"2024-10-21T12:17:06.070Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-10-21T19:39:38.451Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.