fkie_cve-2024-42232
Vulnerability from fkie_nvd
Published
2024-08-07 16:15
Modified
2024-08-08 15:02
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: libceph: fix race between delayed_work() and ceph_monc_stop() The way the delayed work is handled in ceph_monc_stop() is prone to races with mon_fault() and possibly also finish_hunting(). Both of these can requeue the delayed work which wouldn't be canceled by any of the following code in case that happens after cancel_delayed_work_sync() runs -- __close_session() doesn't mess with the delayed work in order to avoid interfering with the hunting interval logic. This part was missed in commit b5d91704f53e ("libceph: behave in mon_fault() if cur_mon < 0") and use-after-free can still ensue on monc and objects that hang off of it, with monc->auth and monc->monmap being particularly susceptible to quickly being reused. To fix this: - clear monc->cur_mon and monc->hunting as part of closing the session in ceph_monc_stop() - bail from delayed_work() if monc->cur_mon is cleared, similar to how it's done in mon_fault() and finish_hunting() (based on monc->hunting) - call cancel_delayed_work_sync() after the session is closed
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1177afeca833174ba83504688eec898c6214f4bfPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/20cf67dcb7db842f941eff1af6ee5e9dc41796d7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2d33654d40a05afd91ab24c9a73ab512a0670a9aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/33d38c5da17f8db2d80e811b7829d2822c10625ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/34b76d1922e41da1fa73d43b764cddd82ac9733cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/63e5d035e3a7ab7412a008f202633c5e6a0a28eaPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/69c7b2fe4c9cc1d3b1186d1c5606627ecf0de883Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9525af1f58f67df387768770fcf6d6a8f23aee3dPatch
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 *


To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: fix race between delayed_work() and ceph_monc_stop()\n\nThe way the delayed work is handled in ceph_monc_stop() is prone to\nraces with mon_fault() and possibly also finish_hunting().  Both of\nthese can requeue the delayed work which wouldn\u0027t be canceled by any of\nthe following code in case that happens after cancel_delayed_work_sync()\nruns -- __close_session() doesn\u0027t mess with the delayed work in order\nto avoid interfering with the hunting interval logic.  This part was\nmissed in commit b5d91704f53e (\"libceph: behave in mon_fault() if\ncur_mon \u003c 0\") and use-after-free can still ensue on monc and objects\nthat hang off of it, with monc-\u003eauth and monc-\u003emonmap being\nparticularly susceptible to quickly being reused.\n\nTo fix this:\n\n- clear monc-\u003ecur_mon and monc-\u003ehunting as part of closing the session\n  in ceph_monc_stop()\n- bail from delayed_work() if monc-\u003ecur_mon is cleared, similar to how\n  it\u0027s done in mon_fault() and finish_hunting() (based on monc-\u003ehunting)\n- call cancel_delayed_work_sync() after the session is closed"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: libceph: corrige la ejecuci\u00f3n entre retardado_work() y ceph_monc_stop() La forma en que se maneja el trabajo retrasado en ceph_monc_stop() es propensa a ejecuci\u00f3ns con mon_fault() y posiblemente tambi\u00e9n con Finish_hunting(). Ambos pueden volver a poner en cola el trabajo retrasado que no ser\u00eda cancelado por ninguno de los siguientes c\u00f3digos en caso de que eso suceda despu\u00e9s de que se ejecute cancel_delayed_work_sync() - __close_session() no interfiere con el trabajo retrasado para evitar interferir con la b\u00fasqueda l\u00f3gica de intervalo. Esta parte se omiti\u00f3 en el commit b5d91704f53e (\"libceph: comportarse en mon_fault() si cur_mon \u0026lt; 0\") y el use-after-free a\u00fan puede producirse en monc y los objetos que cuelgan de \u00e9l, con monc-\u0026gt;auth y monc-\u0026gt; monmap es particularmente susceptible de ser reutilizado r\u00e1pidamente. Para solucionar esto: - borre monc-\u0026gt;cur_mon y monc-\u0026gt;hunting como parte del cierre de la sesi\u00f3n en ceph_monc_stop() - libere de delay_work() si monc-\u0026gt;cur_mon est\u00e1 borrado, similar a como se hace en mon_fault() y Finish_hunting () (basado en monc-\u0026gt;hunting): llame a cancel_delayed_work_sync() despu\u00e9s de cerrar la sesi\u00f3n"
    }
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  "id": "CVE-2024-42232",
  "lastModified": "2024-08-08T15:02:09.750",
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          "attackVector": "LOCAL",
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          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
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        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2024-08-07T16:15:46.213",
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      "source": "nvd@nist.gov",
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}


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