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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": "2025-11-03T23:16:42.523", "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": "[email protected]", "type": "Primary"}]}, "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": "[email protected]", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2025:6966", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-570.12.1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-13T00:00:00Z"}, {"advisory": "RHSA-2025:6966", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-570.12.1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-13T00:00:00Z"}], "bugzilla": {"description": "kernel: netfilter: xtables: avoid NFPROTO_UNSPEC where needed", "id": "2320587", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2320587"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-470", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnetfilter: xtables: avoid NFPROTO_UNSPEC where needed\nsyzbot managed to call xt_cluster match via ebtables:\nWARNING: CPU: 0 PID: 11 at net/netfilter/xt_cluster.c:72 xt_cluster_mt+0x196/0x780\n[..]\nebt_do_table+0x174b/0x2a40\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.\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.\nCheck all UNSPEC matches and targets for similar issues:\n- matches and targets are fine except if they assume skb_network_header()\nis valid -- this is only true when called from inet layer: ip(6) stack\npulls the ip/ipv6 header into linear data area.\n- targets that return XT_CONTINUE or other xtables verdicts must be\nrestricted too, they are incompatbile with the ebtables traverser, e.g.\nEBT_CONTINUE is a completely different value than XT_CONTINUE.\nMost matches/targets are changed to register for NFPROTO_IPV4/IPV6, as\nthey are provided for use by ip(6)tables.\nThe MARK target is also used by arptables, so register for NFPROTO_ARP too.\nWhile at it, bail out if connbytes fails to enable the corresponding\nconntrack family.\nThis change passes the selftests in iptables.git."], "name": "CVE-2024-50038", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-10-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-50038\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-50038\nhttps://lore.kernel.org/linux-cve-announce/2024102132-CVE-2024-50038-dc41@gregkh/T"], "threat_severity": "Moderate"}