fkie_cve-2024-35811
Vulnerability from fkie_nvd
Published
2024-05-17 14:15
Modified
2025-01-14 14:23
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: wifi: brcmfmac: Fix use-after-free bug in brcmf_cfg80211_detach This is the candidate patch of CVE-2023-47233 : https://nvd.nist.gov/vuln/detail/CVE-2023-47233 In brcm80211 driver,it starts with the following invoking chain to start init a timeout worker: ->brcmf_usb_probe ->brcmf_usb_probe_cb ->brcmf_attach ->brcmf_bus_started ->brcmf_cfg80211_attach ->wl_init_priv ->brcmf_init_escan ->INIT_WORK(&cfg->escan_timeout_work, brcmf_cfg80211_escan_timeout_worker); If we disconnect the USB by hotplug, it will call brcmf_usb_disconnect to make cleanup. The invoking chain is : brcmf_usb_disconnect ->brcmf_usb_disconnect_cb ->brcmf_detach ->brcmf_cfg80211_detach ->kfree(cfg); While the timeout woker may still be running. This will cause a use-after-free bug on cfg in brcmf_cfg80211_escan_timeout_worker. Fix it by deleting the timer and canceling the worker in brcmf_cfg80211_detach. [arend.vanspriel@broadcom.com: keep timer delete as is and cancel work just before free]
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0a7591e14a8da794d0b93b5d1c6254ccb23adacbPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0b812f706fd7090be74812101114a0e165b36744Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0f7352557a35ab7888bc7831411ec8a3cbe20d78Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/190794848e2b9d15de92d502b6ac652806904f5aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/202c503935042272e2f9e1bb549d5f69a8681169Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6678a1e7d896c00030b31491690e8ddc9a90767aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8c36205123dc57349b59b4f1a2301eb278cbc731Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8e3f03f4ef7c36091f46e7349096efb5a2cdb3a1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bacb8c3ab86dcd760c15903fcee58169bc3026aaPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0a7591e14a8da794d0b93b5d1c6254ccb23adacbPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0b812f706fd7090be74812101114a0e165b36744Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0f7352557a35ab7888bc7831411ec8a3cbe20d78Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/190794848e2b9d15de92d502b6ac652806904f5aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/202c503935042272e2f9e1bb549d5f69a8681169Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/6678a1e7d896c00030b31491690e8ddc9a90767aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8c36205123dc57349b59b4f1a2301eb278cbc731Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8e3f03f4ef7c36091f46e7349096efb5a2cdb3a1Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/bacb8c3ab86dcd760c15903fcee58169bc3026aaPatch
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/06/msg00017.htmlMailing List
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/06/msg00020.htmlMailing List
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 *
debian debian_linux 10.0


To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: brcmfmac: Fix use-after-free bug in brcmf_cfg80211_detach\n\nThis is the candidate patch of CVE-2023-47233 :\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-47233\n\nIn brcm80211 driver,it starts with the following invoking chain\nto start init a timeout worker:\n\n-\u003ebrcmf_usb_probe\n  -\u003ebrcmf_usb_probe_cb\n    -\u003ebrcmf_attach\n      -\u003ebrcmf_bus_started\n        -\u003ebrcmf_cfg80211_attach\n          -\u003ewl_init_priv\n            -\u003ebrcmf_init_escan\n              -\u003eINIT_WORK(\u0026cfg-\u003eescan_timeout_work,\n\t\t  brcmf_cfg80211_escan_timeout_worker);\n\nIf we disconnect the USB by hotplug, it will call\nbrcmf_usb_disconnect to make cleanup. The invoking chain is :\n\nbrcmf_usb_disconnect\n  -\u003ebrcmf_usb_disconnect_cb\n    -\u003ebrcmf_detach\n      -\u003ebrcmf_cfg80211_detach\n        -\u003ekfree(cfg);\n\nWhile the timeout woker may still be running. This will cause\na use-after-free bug on cfg in brcmf_cfg80211_escan_timeout_worker.\n\nFix it by deleting the timer and canceling the worker in\nbrcmf_cfg80211_detach.\n\n[arend.vanspriel@broadcom.com: keep timer delete as is and cancel work just before free]"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: wifi: brcmfmac: corregido el error de use after free en brcmf_cfg80211_detach Este es el parche candidato de CVE-2023-47233: https://nvd.nist.gov/vuln/detail /CVE-2023-47233 En el controlador brcm80211, comienza con la siguiente cadena de invocaci\u00f3n para iniciar un trabajador de tiempo de espera: -\u0026gt;brcmf_usb_probe -\u0026gt;brcmf_usb_probe_cb -\u0026gt;brcmf_attach -\u0026gt;brcmf_bus_started -\u0026gt;brcmf_cfg80211_attach -\u0026gt;wl_init_priv -\u0026gt;brcmf_init_escan -\u0026gt;INIT_WORK(\u0026amp;cfg -\u0026gt;escan_timeout_work, brcmf_cfg80211_escan_timeout_worker); Si desconectamos el USB mediante hotplug, llamar\u00e1 a brcmf_usb_disconnect para realizar la limpieza. La cadena de invocaci\u00f3n es: brcmf_usb_disconnect -\u0026gt;brcmf_usb_disconnect_cb -\u0026gt;brcmf_detach -\u0026gt;brcmf_cfg80211_detach -\u0026gt;kfree(cfg); Mientras que el activador de tiempo de espera a\u00fan puede estar ejecut\u00e1ndose. Esto provocar\u00e1 un error de use after free en cfg en brcmf_cfg80211_escan_timeout_worker. Soluci\u00f3nelo eliminando el temporizador y cancelando el trabajador en brcmf_cfg80211_detach. [arend.vanspriel@broadcom.com: mantenga la eliminaci\u00f3n del temporizador tal como est\u00e1 y cancele el trabajo justo antes de liberarlo]"
    }
  ],
  "id": "CVE-2024-35811",
  "lastModified": "2025-01-14T14:23:38.660",
  "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": "2024-05-17T14:15:15.177",
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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