Vulnerability-Lookup

CVE-2021-47244 (GCVE-0-2021-47244)

Vulnerability from cvelistv5 – Published: 2024-05-21 14:19 – Updated: 2025-05-04 07:07

Title

mptcp: Fix out of bounds when parsing TCP options

Summary

In the Linux kernel, the following vulnerability has been resolved: mptcp: Fix out of bounds when parsing TCP options The TCP option parser in mptcp (mptcp_get_options) could read one byte out of bounds. When the length is 1, the execution flow gets into the loop, reads one byte of the opcode, and if the opcode is neither TCPOPT_EOL nor TCPOPT_NOP, it reads one more byte, which exceeds the length of 1. This fix is inspired by commit 9609dad263f8 ("ipv4: tcp_input: fix stack out of bounds when parsing TCP options.").

Severity ?

6.2 (Medium)


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

CWE

CWE-noinfo Not enough information

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/73eeba71dc9932970…
	https://git.kernel.org/stable/c/76e02b8905d0691e8…
	https://git.kernel.org/stable/c/07718be265680dcf4…

Impacted products

Vendor

Product

Version

Linux

Affected: cec37a6e41aae7bf3df9a3da783380a4d9325fd8 , < 73eeba71dc9932970befa009e68272a3d5ec4a58 (git)
Affected: cec37a6e41aae7bf3df9a3da783380a4d9325fd8 , < 76e02b8905d0691e89e104a882f3bba7dd0f6037 (git)
Affected: cec37a6e41aae7bf3df9a3da783380a4d9325fd8 , < 07718be265680dcf496347d475ce1a5442f55ad7 (git)

Linux

Affected: 5.6
Unaffected: 0 , < 5.6 (semver)
Unaffected: 5.10.46 , ≤ 5.10.* (semver)
Unaffected: 5.12.13 , ≤ 5.12.* (semver)
Unaffected: 5.13 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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      "cveMetadata": "{\"cveId\": \"CVE-2021-47244\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-12-19T07:38:07.078Z\", \"dateReserved\": \"2024-04-10T18:59:19.533Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-21T14:19:42.983Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}

GHSA-GRFR-GX46-J682

Vulnerability from github – Published: 2024-05-21 15:31 – Updated: 2024-11-06 00:31

Details

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

mptcp: Fix out of bounds when parsing TCP options

The TCP option parser in mptcp (mptcp_get_options) could read one byte out of bounds. When the length is 1, the execution flow gets into the loop, reads one byte of the opcode, and if the opcode is neither TCPOPT_EOL nor TCPOPT_NOP, it reads one more byte, which exceeds the length of 1.

This fix is inspired by commit 9609dad263f8 ("ipv4: tcp_input: fix stack out of bounds when parsing TCP options.").

Severity ?

6.2 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2021-47244"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-21T15:15:13Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: Fix out of bounds when parsing TCP options\n\nThe TCP option parser in mptcp (mptcp_get_options) could read one byte\nout of bounds. When the length is 1, the execution flow gets into the\nloop, reads one byte of the opcode, and if the opcode is neither\nTCPOPT_EOL nor TCPOPT_NOP, it reads one more byte, which exceeds the\nlength of 1.\n\nThis fix is inspired by commit 9609dad263f8 (\"ipv4: tcp_input: fix stack\nout of bounds when parsing TCP options.\").",
  "id": "GHSA-grfr-gx46-j682",
  "modified": "2024-11-06T00:31:53Z",
  "published": "2024-05-21T15:31:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47244"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/07718be265680dcf496347d475ce1a5442f55ad7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/73eeba71dc9932970befa009e68272a3d5ec4a58"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/76e02b8905d0691e89e104a882f3bba7dd0f6037"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

FKIE_CVE-2021-47244

Vulnerability from fkie_nvd - Published: 2024-05-21 15:15 - Updated: 2025-04-04 14:30

Severity ?

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

Summary

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/07718be265680dcf496347d475ce1a5442f55ad7	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/73eeba71dc9932970befa009e68272a3d5ec4a58	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/76e02b8905d0691e89e104a882f3bba7dd0f6037	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/07718be265680dcf496347d475ce1a5442f55ad7	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/73eeba71dc9932970befa009e68272a3d5ec4a58	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/76e02b8905d0691e89e104a882f3bba7dd0f6037	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	5.13
linux	linux_kernel	5.13
linux	linux_kernel	5.13
linux	linux_kernel	5.13
linux	linux_kernel	5.13
linux	linux_kernel	5.13

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "EE69F178-DCD1-4D17-B1CF-168946ED1F5B",
              "versionEndExcluding": "5.10.46",
              "versionStartIncluding": "5.6",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "7806E7E5-6D4F-4E18-81C1-79B3C60EE855",
              "versionEndExcluding": "5.12.13",
              "versionStartIncluding": "5.11",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "0CBAD0FC-C281-4666-AB2F-F8E6E1165DF7",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "96AC23B2-D46A-49D9-8203-8E1BEDCA8532",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "DA610E30-717C-4700-9F77-A3C9244F3BFD",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc4:*:*:*:*:*:*",
              "matchCriteriaId": "1ECD33F5-85BE-430B-8F86-8D7BD560311D",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc5:*:*:*:*:*:*",
              "matchCriteriaId": "CF351855-2437-4CF5-AD7C-BDFA51F27683",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc6:*:*:*:*:*:*",
              "matchCriteriaId": "25A855BA-2118-44F2-90EF-EBBB12AF51EF",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: Fix out of bounds when parsing TCP options\n\nThe TCP option parser in mptcp (mptcp_get_options) could read one byte\nout of bounds. When the length is 1, the execution flow gets into the\nloop, reads one byte of the opcode, and if the opcode is neither\nTCPOPT_EOL nor TCPOPT_NOP, it reads one more byte, which exceeds the\nlength of 1.\n\nThis fix is inspired by commit 9609dad263f8 (\"ipv4: tcp_input: fix stack\nout of bounds when parsing TCP options.\")."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: mptcp: correcci\u00f3n de l\u00edmites al analizar opciones TCP. El analizador de opciones TCP en mptcp (mptcp_get_options) podr\u00eda leer un byte fuera de los l\u00edmites. Cuando la longitud es 1, el flujo de ejecuci\u00f3n entra en el bucle, lee un byte del c\u00f3digo de operaci\u00f3n y, si el c\u00f3digo de operaci\u00f3n no es TCPOPT_EOL ni TCPOPT_NOP, lee un byte m\u00e1s, que excede la longitud de 1. Esta soluci\u00f3n est\u00e1 inspirada en la confirmaci\u00f3n. 9609dad263f8 (\"ipv4: tcp_input: corrige la pila fuera de los l\u00edmites al analizar las opciones de TCP\")."
    }
  ],
  "id": "CVE-2021-47244",
  "lastModified": "2025-04-04T14:30:24.850",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 6.2,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 3.6,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
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  "published": "2024-05-21T15:15:13.477",
  "references": [
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    },
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    },
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      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/07718be265680dcf496347d475ce1a5442f55ad7"
    },
    {
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    }
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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        {
          "lang": "en",
          "value": "CWE-125"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

GSD-2021-47244

Vulnerability from gsd - Updated: 2024-04-11 05:05

Details

** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided.

Aliases

CVE-2021-47244

JSON

To clipboard

{
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-47244"
      ],
      "id": "GSD-2021-47244",
      "modified": "2024-04-11T05:05:09.691032Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "cve@mitre.org",
        "ID": "CVE-2021-47244",
        "STATE": "RESERVED"
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided."
          }
        ]
      }
    }
  }
}

Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2021-47244 (GCVE-0-2021-47244)

GHSA-GRFR-GX46-J682

FKIE_CVE-2021-47244

GSD-2021-47244

Tags

Sightings

Nomenclature