fkie_cve-2022-48974
Vulnerability from fkie_nvd
Published
2024-10-21 20:15
Modified
2024-10-25 15:25
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: conntrack: fix using __this_cpu_add in preemptible Currently in nf_conntrack_hash_check_insert(), when it fails in nf_ct_ext_valid_pre/post(), NF_CT_STAT_INC() will be called in the preemptible context, a call trace can be triggered: BUG: using __this_cpu_add() in preemptible [00000000] code: conntrack/1636 caller is nf_conntrack_hash_check_insert+0x45/0x430 [nf_conntrack] Call Trace: <TASK> dump_stack_lvl+0x33/0x46 check_preemption_disabled+0xc3/0xf0 nf_conntrack_hash_check_insert+0x45/0x430 [nf_conntrack] ctnetlink_create_conntrack+0x3cd/0x4e0 [nf_conntrack_netlink] ctnetlink_new_conntrack+0x1c0/0x450 [nf_conntrack_netlink] nfnetlink_rcv_msg+0x277/0x2f0 [nfnetlink] netlink_rcv_skb+0x50/0x100 nfnetlink_rcv+0x65/0x144 [nfnetlink] netlink_unicast+0x1ae/0x290 netlink_sendmsg+0x257/0x4f0 sock_sendmsg+0x5f/0x70 This patch is to fix it by changing to use NF_CT_STAT_INC_ATOMIC() for nf_ct_ext_valid_pre/post() check in nf_conntrack_hash_check_insert(), as well as nf_ct_ext_valid_post() in __nf_conntrack_confirm(). Note that nf_ct_ext_valid_pre() check in __nf_conntrack_confirm() is safe to use NF_CT_STAT_INC(), as it's under local_bh_disable().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9464d0b68f11a9bc768370c3260ec02b3550447bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d9bf1138a5db419db13bd9fcd3a7178d6bb20f7cPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1


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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: conntrack: fix using __this_cpu_add in preemptible\n\nCurrently in nf_conntrack_hash_check_insert(), when it fails in\nnf_ct_ext_valid_pre/post(), NF_CT_STAT_INC() will be called in the\npreemptible context, a call trace can be triggered:\n\n   BUG: using __this_cpu_add() in preemptible [00000000] code: conntrack/1636\n   caller is nf_conntrack_hash_check_insert+0x45/0x430 [nf_conntrack]\n   Call Trace:\n    \u003cTASK\u003e\n    dump_stack_lvl+0x33/0x46\n    check_preemption_disabled+0xc3/0xf0\n    nf_conntrack_hash_check_insert+0x45/0x430 [nf_conntrack]\n    ctnetlink_create_conntrack+0x3cd/0x4e0 [nf_conntrack_netlink]\n    ctnetlink_new_conntrack+0x1c0/0x450 [nf_conntrack_netlink]\n    nfnetlink_rcv_msg+0x277/0x2f0 [nfnetlink]\n    netlink_rcv_skb+0x50/0x100\n    nfnetlink_rcv+0x65/0x144 [nfnetlink]\n    netlink_unicast+0x1ae/0x290\n    netlink_sendmsg+0x257/0x4f0\n    sock_sendmsg+0x5f/0x70\n\nThis patch is to fix it by changing to use NF_CT_STAT_INC_ATOMIC() for\nnf_ct_ext_valid_pre/post() check in nf_conntrack_hash_check_insert(),\nas well as nf_ct_ext_valid_post() in __nf_conntrack_confirm().\n\nNote that nf_ct_ext_valid_pre() check in __nf_conntrack_confirm() is\nsafe to use NF_CT_STAT_INC(), as it\u0027s under local_bh_disable()."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: conntrack: correcci\u00f3n al usar __this_cpu_add en preemptible Actualmente en nf_conntrack_hash_check_insert(), cuando fallo en nf_ct_ext_valid_pre/post(), se llamar\u00e1 a NF_CT_STAT_INC() en el contexto preemptible, se puede activar un seguimiento de llamada: ERROR: uso de __this_cpu_add() en preemptible [00000000] c\u00f3digo: conntrack/1636 el llamador es nf_conntrack_hash_check_insert+0x45/0x430 [nf_conntrack] Seguimiento de llamada:  dump_stack_lvl+0x33/0x46 check_preemption_disabled+0xc3/0xf0 Este parche es para solucionarlo cambiando para usar NF_CT_STAT_INC_ATOMIC() para la comprobaci\u00f3n de nf_ct_ext_valid_pre/post() en nf_conntrack_hash_check_insert(), as\u00ed como nf_ct_ext_valid_post() en __nf_conntrack_confirm(). Tenga en cuenta que la comprobaci\u00f3n de nf_ct_ext_valid_pre() en __nf_conntrack_confirm() es segura para usar NF_CT_STAT_INC(), ya que se encuentra bajo local_bh_disable()."
    }
  ],
  "id": "CVE-2022-48974",
  "lastModified": "2024-10-25T15:25:54.433",
  "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"
      }
    ]
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  "published": "2024-10-21T20:15:09.517",
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          "value": "NVD-CWE-noinfo"
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      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
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}


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