github - ghsa-h5ph-x8j2-r7vg

ghsa-h5ph-x8j2-r7vg

Vulnerability from github

Published

2024-10-21 12:30

Modified

2024-10-24 15:31

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:

bpf, lsm: Add check for BPF LSM return value

A bpf prog returning a positive number attached to file_alloc_security hook makes kernel panic.

This happens because file system can not filter out the positive number returned by the LSM prog using IS_ERR, and misinterprets this positive number as a file pointer.

Given that hook file_alloc_security never returned positive number before the introduction of BPF LSM, and other BPF LSM hooks may encounter similar issues, this patch adds LSM return value check in verifier, to ensure no unexpected value is returned.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-47703"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-10-21T12:15:06Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, lsm: Add check for BPF LSM return value\n\nA bpf prog returning a positive number attached to file_alloc_security\nhook makes kernel panic.\n\nThis happens because file system can not filter out the positive number\nreturned by the LSM prog using IS_ERR, and misinterprets this positive\nnumber as a file pointer.\n\nGiven that hook file_alloc_security never returned positive number\nbefore the introduction of BPF LSM, and other BPF LSM hooks may\nencounter similar issues, this patch adds LSM return value check\nin verifier, to ensure no unexpected value is returned.",
  "id": "GHSA-h5ph-x8j2-r7vg",
  "modified": "2024-10-24T15:31:08Z",
  "published": "2024-10-21T12:30:55Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-47703"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1050727d83e70449991c29dd1cf29fe936a63da3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/27ca3e20fe80be85a92b10064dfeb56cb2564b1c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5d99e198be279045e6ecefe220f5c52f8ce9bfd5"
    }
  ],
  "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-2024-47703

Vulnerability from cvelistv5

Published

2024-10-21 11:53

Modified

2024-12-19 09:26

Severity ?

Summary

In the Linux kernel, the following vulnerability has been resolved: bpf, lsm: Add check for BPF LSM return value A bpf prog returning a positive number attached to file_alloc_security hook makes kernel panic. This happens because file system can not filter out the positive number returned by the LSM prog using IS_ERR, and misinterprets this positive number as a file pointer. Given that hook file_alloc_security never returned positive number before the introduction of BPF LSM, and other BPF LSM hooks may encounter similar issues, this patch adds LSM return value check in verifier, to ensure no unexpected value is returned.

References

▼	URL	Tags
	https://git.kernel.org/stable/c/1050727d83e70449991c29dd1cf29fe936a63da3
	https://git.kernel.org/stable/c/27ca3e20fe80be85a92b10064dfeb56cb2564b1c
	https://git.kernel.org/stable/c/5d99e198be279045e6ecefe220f5c52f8ce9bfd5

Impacted products

Vendor

Product

Version

▼

Linux

Version: 520b7aa00d8cd8e411ecc09f63a2acd90feb6d29
Version: 520b7aa00d8cd8e411ecc09f63a2acd90feb6d29
Version: 520b7aa00d8cd8e411ecc09f63a2acd90feb6d29

Linux

Version: 5.7

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-47703",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-10-21T13:04:16.628163Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-10-21T13:14:13.303Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/linux/bpf.h",
            "include/linux/bpf_lsm.h",
            "kernel/bpf/bpf_lsm.c",
            "kernel/bpf/btf.c",
            "kernel/bpf/verifier.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1050727d83e70449991c29dd1cf29fe936a63da3",
              "status": "affected",
              "version": "520b7aa00d8cd8e411ecc09f63a2acd90feb6d29",
              "versionType": "git"
            },
            {
              "lessThan": "27ca3e20fe80be85a92b10064dfeb56cb2564b1c",
              "status": "affected",
              "version": "520b7aa00d8cd8e411ecc09f63a2acd90feb6d29",
              "versionType": "git"
            },
            {
              "lessThan": "5d99e198be279045e6ecefe220f5c52f8ce9bfd5",
              "status": "affected",
              "version": "520b7aa00d8cd8e411ecc09f63a2acd90feb6d29",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "include/linux/bpf.h",
            "include/linux/bpf_lsm.h",
            "kernel/bpf/bpf_lsm.c",
            "kernel/bpf/btf.c",
            "kernel/bpf/verifier.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.7"
            },
            {
              "lessThan": "5.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.10.*",
              "status": "unaffected",
              "version": "6.10.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.11.*",
              "status": "unaffected",
              "version": "6.11.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.12",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, lsm: Add check for BPF LSM return value\n\nA bpf prog returning a positive number attached to file_alloc_security\nhook makes kernel panic.\n\nThis happens because file system can not filter out the positive number\nreturned by the LSM prog using IS_ERR, and misinterprets this positive\nnumber as a file pointer.\n\nGiven that hook file_alloc_security never returned positive number\nbefore the introduction of BPF LSM, and other BPF LSM hooks may\nencounter similar issues, this patch adds LSM return value check\nin verifier, to ensure no unexpected value is returned."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-12-19T09:26:25.636Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/1050727d83e70449991c29dd1cf29fe936a63da3"
        },
        {
          "url": "https://git.kernel.org/stable/c/27ca3e20fe80be85a92b10064dfeb56cb2564b1c"
        },
        {
          "url": "https://git.kernel.org/stable/c/5d99e198be279045e6ecefe220f5c52f8ce9bfd5"
        }
      ],
      "title": "bpf, lsm: Add check for BPF LSM return value",
      "x_generator": {
        "engine": "bippy-5f407fcff5a0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-47703",
    "datePublished": "2024-10-21T11:53:38.714Z",
    "dateReserved": "2024-09-30T16:00:12.945Z",
    "dateUpdated": "2024-12-19T09:26:25.636Z",
    "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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