Vulnerability-Lookup

PYSEC-2024-93

Vulnerability from pysec - Published: 2024-09-17 19:15 - Updated: 2024-09-25 06:23

Details

A vulnerability was found in MicroPython 1.23.0. It has been classified as critical. Affected is the function mp_vfs_umount of the file extmod/vfs.c of the component VFS Unmount Handler. The manipulation leads to heap-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The name of the patch is 29943546343c92334e8518695a11fc0e2ceea68b. It is recommended to apply a patch to fix this issue. In the VFS unmount process, the comparison between the mounted path string and the unmount requested string is based solely on the length of the unmount string, which can lead to a heap buffer overflow read.

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Impacted products

Name	purl
micropython-io	pkg:pypi/micropython-io

Aliases

CVE-2024-8946

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "micropython-io",
        "purl": "pkg:pypi/micropython-io"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "29943546343c92334e8518695a11fc0e2ceea68b"
            }
          ],
          "repo": "https://github.com/micropython/micropython",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.0.1",
        "0.0.2",
        "0.0.3",
        "0.1"
      ]
    }
  ],
  "aliases": [
    "CVE-2024-8946"
  ],
  "details": "A vulnerability was found in MicroPython 1.23.0. It has been classified as critical. Affected is the function mp_vfs_umount of the file extmod/vfs.c of the component VFS Unmount Handler. The manipulation leads to heap-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The name of the patch is 29943546343c92334e8518695a11fc0e2ceea68b. It is recommended to apply a patch to fix this issue. In the VFS unmount process, the comparison between the mounted path string and the unmount requested string is based solely on the length of the unmount string, which can lead to a heap buffer overflow read.",
  "id": "PYSEC-2024-93",
  "modified": "2024-09-25T06:23:55.864558+00:00",
  "published": "2024-09-17T19:15:00+00:00",
  "references": [
    {
      "type": "WEB",
      "url": "https://vuldb.com/?id.277764"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?ctiid.277764"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?submit.409312"
    },
    {
      "type": "EVIDENCE",
      "url": "https://github.com/micropython/micropython/issues/13006"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/micropython/micropython/issues/13006"
    },
    {
      "type": "EVIDENCE",
      "url": "https://github.com/micropython/micropython/issues/13006#issuecomment-1820309455"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/micropython/micropython/issues/13006#issuecomment-1820309455"
    },
    {
      "type": "FIX",
      "url": "https://github.com/micropython/micropython/commit/29943546343c92334e8518695a11fc0e2ceea68b"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2024-8946 (GCVE-0-2024-8946)

Vulnerability from cvelistv5 – Published: 2024-09-17 18:31 – Updated: 2024-09-17 20:14

Title

MicroPython VFS Unmount vfs.c mp_vfs_umount heap-based overflow

Summary

Severity

6.9 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

7.3 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

7.3 (High)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-17 20:13 UTC

CWE

CWE-122 - Heap-based Buffer Overflow

Assigner

VulDB mitre root

References

6 references

URL	Tags
https://vuldb.com/?id.277764	vdb-entrytechnical-description
https://vuldb.com/?ctiid.277764	signaturepermissions-required
https://vuldb.com/?submit.409312	third-party-advisory
https://github.com/micropython/micropython/issues/13006	exploitissue-tracking
https://github.com/micropython/micropython/issues…	issue-tracking
https://github.com/micropython/micropython/commit…	patch

Impacted products

2 products

Vendor	Product	Version
n/a	MicroPython	Affected: 1.23.0
micropython	micropython	Affected: 1.23.0 cpe:2.3:a:micropython:micropython::::::::

Credits

qbit (VulDB User)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "affected": [
          {
            "cpes": [
              "cpe:2.3:a:micropython:micropython:*:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "micropython",
            "vendor": "micropython",
            "versions": [
              {
                "status": "affected",
                "version": "1.23.0"
              }
            ]
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-8946",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-17T20:13:35.406616Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-17T20:14:27.949Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "modules": [
            "VFS Unmount Handler"
          ],
          "product": "MicroPython",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "1.23.0"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "qbit (VulDB User)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability was found in MicroPython 1.23.0. It has been classified as critical. Affected is the function mp_vfs_umount of the file extmod/vfs.c of the component VFS Unmount Handler. The manipulation leads to heap-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The name of the patch is 29943546343c92334e8518695a11fc0e2ceea68b. It is recommended to apply a patch to fix this issue. In the VFS unmount process, the comparison between the mounted path string and the unmount requested string is based solely on the length of the unmount string, which can lead to a heap buffer overflow read."
        },
        {
          "lang": "de",
          "value": "Es wurde eine kritische Schwachstelle in MicroPython 1.23.0 ausgemacht. Betroffen hiervon ist die Funktion mp_vfs_umount der Datei extmod/vfs.c der Komponente VFS Unmount Handler. Durch die Manipulation mit unbekannten Daten kann eine heap-based buffer overflow-Schwachstelle ausgenutzt werden. Umgesetzt werden kann der Angriff \u00fcber das Netzwerk. Der Exploit steht zur \u00f6ffentlichen Verf\u00fcgung. Der Patch wird als 29943546343c92334e8518695a11fc0e2ceea68b bezeichnet. Als bestm\u00f6gliche Massnahme wird Patching empfohlen."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N",
            "version": "4.0"
          }
        },
        {
          "cvssV3_1": {
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
            "version": "3.1"
          }
        },
        {
          "cvssV3_0": {
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
            "version": "3.0"
          }
        },
        {
          "cvssV2_0": {
            "baseScore": 7.5,
            "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
            "version": "2.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-122",
              "description": "Heap-based Buffer Overflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-09-17T18:50:11.959Z",
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
      },
      "references": [
        {
          "name": "VDB-277764 | MicroPython VFS Unmount vfs.c mp_vfs_umount heap-based overflow",
          "tags": [
            "vdb-entry",
            "technical-description"
          ],
          "url": "https://vuldb.com/?id.277764"
        },
        {
          "name": "VDB-277764 | CTI Indicators (IOB, IOC, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/?ctiid.277764"
        },
        {
          "name": "Submit #409312 | micropython v1.23.0 Heap-based Buffer Overflow",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/?submit.409312"
        },
        {
          "tags": [
            "exploit",
            "issue-tracking"
          ],
          "url": "https://github.com/micropython/micropython/issues/13006"
        },
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/micropython/micropython/issues/13006#issuecomment-1820309455"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/micropython/micropython/commit/29943546343c92334e8518695a11fc0e2ceea68b"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2024-09-17T00:00:00.000Z",
          "value": "Advisory disclosed"
        },
        {
          "lang": "en",
          "time": "2024-09-17T02:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2024-09-17T20:54:30.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "MicroPython VFS Unmount vfs.c mp_vfs_umount heap-based overflow"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2024-8946",
    "datePublished": "2024-09-17T18:31:04.213Z",
    "dateReserved": "2024-09-17T12:47:10.485Z",
    "dateUpdated": "2024-09-17T20:14:27.949Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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PYSEC-2024-93

CVE-2024-8946 (GCVE-0-2024-8946)

Tags

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Nomenclature

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