github - ghsa-xrjv-8x73-5h7v

ghsa-xrjv-8x73-5h7v

Vulnerability from github

Published

2024-09-13 06:30

Modified

2024-09-13 18:31

Severity ?

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

In the Linux kernel, the following vulnerability has been resolved:

nfsd: prevent panic for nfsv4.0 closed files in nfs4_show_open

Prior to commit 3f29cc82a84c ("nfsd: split sc_status out of sc_type") states_show() relied on sc_type field to be of valid type before calling into a subfunction to show content of a particular stateid. From that commit, we split the validity of the stateid into sc_status and no longer changed sc_type to 0 while unhashing the stateid. This resulted in kernel oopsing for nfsv4.0 opens that stay around and in nfs4_show_open() would derefence sc_file which was NULL.

Instead, for closed open stateids forgo displaying information that relies of having a valid sc_file.

To reproduce: mount the server with 4.0, read and close a file and then on the server cat /proc/fs/nfsd/clients/2/states

[ 513.590804] Call trace: [ 513.590925] _raw_spin_lock+0xcc/0x160 [ 513.591119] nfs4_show_open+0x78/0x2c0 [nfsd] [ 513.591412] states_show+0x44c/0x488 [nfsd] [ 513.591681] seq_read_iter+0x5d8/0x760 [ 513.591896] seq_read+0x188/0x208 [ 513.592075] vfs_read+0x148/0x470 [ 513.592241] ksys_read+0xcc/0x178

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{
  "affected": [],
  "aliases": [
    "CVE-2024-46682"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-09-13T06:15:12Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: prevent panic for nfsv4.0 closed files in nfs4_show_open\n\nPrior to commit 3f29cc82a84c (\"nfsd: split sc_status out of\nsc_type\") states_show() relied on sc_type field to be of valid\ntype before calling into a subfunction to show content of a\nparticular stateid. From that commit, we split the validity of\nthe stateid into sc_status and no longer changed sc_type to 0\nwhile unhashing the stateid. This resulted in kernel oopsing\nfor nfsv4.0 opens that stay around and in nfs4_show_open()\nwould derefence sc_file which was NULL.\n\nInstead, for closed open stateids forgo displaying information\nthat relies of having a valid sc_file.\n\nTo reproduce: mount the server with 4.0, read and close\na file and then on the server cat /proc/fs/nfsd/clients/2/states\n\n[  513.590804] Call trace:\n[  513.590925]  _raw_spin_lock+0xcc/0x160\n[  513.591119]  nfs4_show_open+0x78/0x2c0 [nfsd]\n[  513.591412]  states_show+0x44c/0x488 [nfsd]\n[  513.591681]  seq_read_iter+0x5d8/0x760\n[  513.591896]  seq_read+0x188/0x208\n[  513.592075]  vfs_read+0x148/0x470\n[  513.592241]  ksys_read+0xcc/0x178",
  "id": "GHSA-xrjv-8x73-5h7v",
  "modified": "2024-09-13T18:31:46Z",
  "published": "2024-09-13T06:30:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-46682"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a204501e1743d695ca2930ed25a2be9f8ced96d3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ba0b697de298285301c71c258598226e06494236"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

cve-2024-46682

Vulnerability from cvelistv5

Published

2024-09-13 05:29

Modified

2024-12-19 09:20

Severity ?

Summary

In the Linux kernel, the following vulnerability has been resolved: nfsd: prevent panic for nfsv4.0 closed files in nfs4_show_open Prior to commit 3f29cc82a84c ("nfsd: split sc_status out of sc_type") states_show() relied on sc_type field to be of valid type before calling into a subfunction to show content of a particular stateid. From that commit, we split the validity of the stateid into sc_status and no longer changed sc_type to 0 while unhashing the stateid. This resulted in kernel oopsing for nfsv4.0 opens that stay around and in nfs4_show_open() would derefence sc_file which was NULL. Instead, for closed open stateids forgo displaying information that relies of having a valid sc_file. To reproduce: mount the server with 4.0, read and close a file and then on the server cat /proc/fs/nfsd/clients/2/states [ 513.590804] Call trace: [ 513.590925] _raw_spin_lock+0xcc/0x160 [ 513.591119] nfs4_show_open+0x78/0x2c0 [nfsd] [ 513.591412] states_show+0x44c/0x488 [nfsd] [ 513.591681] seq_read_iter+0x5d8/0x760 [ 513.591896] seq_read+0x188/0x208 [ 513.592075] vfs_read+0x148/0x470 [ 513.592241] ksys_read+0xcc/0x178

References

▼	URL	Tags
	https://git.kernel.org/stable/c/ba0b697de298285301c71c258598226e06494236
	https://git.kernel.org/stable/c/a204501e1743d695ca2930ed25a2be9f8ced96d3

Impacted products

Vendor

Product

Version

▼

Linux

Version: 3f29cc82a84c23cfd12b903029dd26002ca825f5
Version: 3f29cc82a84c23cfd12b903029dd26002ca825f5

Linux

Version: 6.9

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-46682",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
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                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-29T15:09:15.742949Z",
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
      }
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          "programFiles": [
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: prevent panic for nfsv4.0 closed files in nfs4_show_open\n\nPrior to commit 3f29cc82a84c (\"nfsd: split sc_status out of\nsc_type\") states_show() relied on sc_type field to be of valid\ntype before calling into a subfunction to show content of a\nparticular stateid. From that commit, we split the validity of\nthe stateid into sc_status and no longer changed sc_type to 0\nwhile unhashing the stateid. This resulted in kernel oopsing\nfor nfsv4.0 opens that stay around and in nfs4_show_open()\nwould derefence sc_file which was NULL.\n\nInstead, for closed open stateids forgo displaying information\nthat relies of having a valid sc_file.\n\nTo reproduce: mount the server with 4.0, read and close\na file and then on the server cat /proc/fs/nfsd/clients/2/states\n\n[  513.590804] Call trace:\n[  513.590925]  _raw_spin_lock+0xcc/0x160\n[  513.591119]  nfs4_show_open+0x78/0x2c0 [nfsd]\n[  513.591412]  states_show+0x44c/0x488 [nfsd]\n[  513.591681]  seq_read_iter+0x5d8/0x760\n[  513.591896]  seq_read+0x188/0x208\n[  513.592075]  vfs_read+0x148/0x470\n[  513.592241]  ksys_read+0xcc/0x178"
        }
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        "dateUpdated": "2024-12-19T09:20:52.369Z",
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        {
          "url": "https://git.kernel.org/stable/c/a204501e1743d695ca2930ed25a2be9f8ced96d3"
        }
      ],
      "title": "nfsd: prevent panic for nfsv4.0 closed files in nfs4_show_open",
      "x_generator": {
        "engine": "bippy-5f407fcff5a0"
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    }
  },
  "cveMetadata": {
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    "assignerShortName": "Linux",
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    "datePublished": "2024-09-13T05:29:15.294Z",
    "dateReserved": "2024-09-11T15:12:18.248Z",
    "dateUpdated": "2024-12-19T09:20:52.369Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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