fkie_cve-2024-35902
Vulnerability from fkie_nvd
Published
2024-05-19 09:15
Modified
2024-12-30 19:47
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: net/rds: fix possible cp null dereference cp might be null, calling cp->cp_conn would produce null dereference [Simon Horman adds:] Analysis: * cp is a parameter of __rds_rdma_map and is not reassigned. * The following call-sites pass a NULL cp argument to __rds_rdma_map() - rds_get_mr() - rds_get_mr_for_dest * Prior to the code above, the following assumes that cp may be NULL (which is indicative, but could itself be unnecessary) trans_private = rs->rs_transport->get_mr( sg, nents, rs, &mr->r_key, cp ? cp->cp_conn : NULL, args->vec.addr, args->vec.bytes, need_odp ? ODP_ZEROBASED : ODP_NOT_NEEDED); * The code modified by this patch is guarded by IS_ERR(trans_private), where trans_private is assigned as per the previous point in this analysis. The only implementation of get_mr that I could locate is rds_ib_get_mr() which can return an ERR_PTR if the conn (4th) argument is NULL. * ret is set to PTR_ERR(trans_private). rds_ib_get_mr can return ERR_PTR(-ENODEV) if the conn (4th) argument is NULL. Thus ret may be -ENODEV in which case the code in question will execute. Conclusion: * cp may be NULL at the point where this patch adds a check; this patch does seem to address a possible bug
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/62fc3357e079a07a22465b9b6ef71bb6ea75ee4bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6794090c742008c53b344b35b021d4a3093dc50aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/92309bed3c5fbe2ccd4c45056efd42edbd06162dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bcd46782e2ec3825d10c1552fcb674d491cc09f9Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cbaac2e5488ed54833897264a5ffb2a341a9f196Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cfb786b03b03c5ff38882bee38525eb9987e4d14Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d275de8ea7be3a453629fddae41d4156762e814cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d49fac38479bfdaec52b3ea274d290c47a294029Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/62fc3357e079a07a22465b9b6ef71bb6ea75ee4bPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/6794090c742008c53b344b35b021d4a3093dc50aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/92309bed3c5fbe2ccd4c45056efd42edbd06162dPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/bcd46782e2ec3825d10c1552fcb674d491cc09f9Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/cbaac2e5488ed54833897264a5ffb2a341a9f196Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/cfb786b03b03c5ff38882bee38525eb9987e4d14Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d275de8ea7be3a453629fddae41d4156762e814cPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d49fac38479bfdaec52b3ea274d290c47a294029Patch
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 6.9
linux linux_kernel 6.9
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\nnet/rds: fix possible cp null dereference\n\ncp might be null, calling cp-\u003ecp_conn would produce null dereference\n\n[Simon Horman adds:]\n\nAnalysis:\n\n* cp is a parameter of __rds_rdma_map and is not reassigned.\n\n* The following call-sites pass a NULL cp argument to __rds_rdma_map()\n\n  - rds_get_mr()\n  - rds_get_mr_for_dest\n\n* Prior to the code above, the following assumes that cp may be NULL\n  (which is indicative, but could itself be unnecessary)\n\n\ttrans_private = rs-\u003ers_transport-\u003eget_mr(\n\t\tsg, nents, rs, \u0026mr-\u003er_key, cp ? cp-\u003ecp_conn : NULL,\n\t\targs-\u003evec.addr, args-\u003evec.bytes,\n\t\tneed_odp ? ODP_ZEROBASED : ODP_NOT_NEEDED);\n\n* The code modified by this patch is guarded by IS_ERR(trans_private),\n  where trans_private is assigned as per the previous point in this analysis.\n\n  The only implementation of get_mr that I could locate is rds_ib_get_mr()\n  which can return an ERR_PTR if the conn (4th) argument is NULL.\n\n* ret is set to PTR_ERR(trans_private).\n  rds_ib_get_mr can return ERR_PTR(-ENODEV) if the conn (4th) argument is NULL.\n  Thus ret may be -ENODEV in which case the code in question will execute.\n\nConclusion:\n* cp may be NULL at the point where this patch adds a check;\n  this patch does seem to address a possible bug"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net/rds: corrige la posible desreferencia nula de cp cp podr\u00eda ser nulo, llamar a cp-\u0026gt;cp_conn producir\u00eda una desreferencia nula [Simon Horman agrega:] An\u00e1lisis: * cp es un par\u00e1metro de __rds_rdma_map y no es reasignado. * Los siguientes sitios de llamadas pasan un argumento cp NULL a __rds_rdma_map() - rds_get_mr() - rds_get_mr_for_dest * Antes del c\u00f3digo anterior, lo siguiente supone que cp puede ser NULL (lo cual es indicativo, pero podr\u00eda ser innecesario) trans_private = rs -\u0026gt;rs_transport-\u0026gt;get_mr( sg, nents, rs, \u0026amp;mr-\u0026gt;r_key, cp ? cp-\u0026gt;cp_conn : NULL, args-\u0026gt;vec.addr, args-\u0026gt;vec.bytes, need_odp ? ODP_ZEROBASED : ODP_NOT_NEEDED); * El c\u00f3digo modificado por este parche est\u00e1 custodiado por IS_ERR(trans_private), donde trans_private se asigna seg\u00fan el punto anterior de este an\u00e1lisis. La \u00fanica implementaci\u00f3n de get_mr que pude localizar es rds_ib_get_mr() que puede devolver un ERR_PTR si el argumento conn (cuarto) es NULL. * ret est\u00e1 establecido en PTR_ERR(trans_private). rds_ib_get_mr puede devolver ERR_PTR(-ENODEV) si el argumento de conexi\u00f3n (cuarto) es NULL. Por lo tanto, ret puede ser -ENODEV, en cuyo caso se ejecutar\u00e1 el c\u00f3digo en cuesti\u00f3n. Conclusi\u00f3n: * cp puede ser NULL en el punto donde este parche agrega una verificaci\u00f3n; este parche parece solucionar un posible error "
    }
  ],
  "id": "CVE-2024-35902",
  "lastModified": "2024-12-30T19:47:46.853",
  "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": "2024-05-19T09:15:11.037",
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
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}


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