Vulnerability-Lookup

GHSA-CHHH-4XRF-42PG

Vulnerability from github – Published: 2024-07-24 09:30 – Updated: 2024-08-01 15:32

Details

libcurl's URL API function curl_url_get() offers punycode conversions, to and from IDN. Asking to convert a name that is exactly 256 bytes, libcurl ends up reading outside of a stack based buffer when built to use the macidn IDN backend. The conversion function then fills up the provided buffer exactly - but does not null terminate the string.

This flaw can lead to stack contents accidently getting returned as part of the converted string.

Severity

3.1 (Low)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2024-6874"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-07-24T08:15:03Z",
    "severity": "LOW"
  },
  "details": "libcurl\u0027s URL API function\n[curl_url_get()](https://curl.se/libcurl/c/curl_url_get.html) offers punycode\nconversions, to and from IDN. Asking to convert a name that is exactly 256\nbytes, libcurl ends up reading outside of a stack based buffer when built to\nuse the *macidn* IDN backend. The conversion function then fills up the\nprovided buffer exactly - but does not null terminate the string.\n\nThis flaw can lead to stack contents accidently getting returned as part of\nthe converted string.",
  "id": "GHSA-chhh-4xrf-42pg",
  "modified": "2024-08-01T15:32:07Z",
  "published": "2024-07-24T09:30:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-6874"
    },
    {
      "type": "WEB",
      "url": "https://hackerone.com/reports/2604391"
    },
    {
      "type": "WEB",
      "url": "https://curl.se/docs/CVE-2024-6874.html"
    },
    {
      "type": "WEB",
      "url": "https://curl.se/docs/CVE-2024-6874.json"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2024/07/24/2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2024-6874 (GCVE-0-2024-6874)

Vulnerability from cvelistv5 – Published: 2024-07-24 07:36 – Updated: 2025-02-13 17:58

Title

macidn punycode buffer overread

Summary

libcurl's URL API function [curl_url_get()](https://curl.se/libcurl/c/curl_url_get.html) offers punycode conversions, to and from IDN. Asking to convert a name that is exactly 256 bytes, libcurl ends up reading outside of a stack based buffer when built to use the *macidn* IDN backend. The conversion function then fills up the provided buffer exactly - but does not null terminate the string. This flaw can lead to stack contents accidently getting returned as part of the converted string.

Severity

3.1 (Low)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-07-24 16:13 UTC

CWE

CWE-126 Buffer Over-read

Assigner

curl redhat root Scorecard

References

5 references

URL	Tags
https://curl.se/docs/CVE-2024-6874.json
https://curl.se/docs/CVE-2024-6874.html
https://hackerone.com/reports/2604391
http://www.openwall.com/lists/oss-security/2024/07/24/2
https://security.netapp.com/advisory/ntap-2024082…

Impacted products

2 products

Vendor	Product	Version
curl	curl	Affected: 8.8.0 , ≤ 8.8.0 (semver)
curl	libcurl	Affected: 8.8.0 cpe:2.3:a:curl:libcurl:8.8.0:::::::*

Credits

z2_ z2_

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JSON

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{
  "containers": {
    "adp": [
      {
        "affected": [
          {
            "cpes": [
              "cpe:2.3:a:curl:libcurl:8.8.0:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "libcurl",
            "vendor": "curl",
            "versions": [
              {
                "status": "affected",
                "version": "8.8.0"
              }
            ]
          }
        ],
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 3.1,
              "baseSeverity": "LOW",
              "confidentialityImpact": "LOW",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2024-6874",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-07-24T16:13:40.560966Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-07-24T16:25:51.575Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-22T18:03:17.766Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "json",
            "tags": [
              "x_transferred"
            ],
            "url": "https://curl.se/docs/CVE-2024-6874.json"
          },
          {
            "name": "www",
            "tags": [
              "x_transferred"
            ],
            "url": "https://curl.se/docs/CVE-2024-6874.html"
          },
          {
            "name": "issue",
            "tags": [
              "x_transferred"
            ],
            "url": "https://hackerone.com/reports/2604391"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2024/07/24/2"
          },
          {
            "url": "https://security.netapp.com/advisory/ntap-20240822-0004/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "curl",
          "vendor": "curl",
          "versions": [
            {
              "lessThanOrEqual": "8.8.0",
              "status": "affected",
              "version": "8.8.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "z2_"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "z2_"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "libcurl\u0027s URL API function\n[curl_url_get()](https://curl.se/libcurl/c/curl_url_get.html) offers punycode\nconversions, to and from IDN. Asking to convert a name that is exactly 256\nbytes, libcurl ends up reading outside of a stack based buffer when built to\nuse the *macidn* IDN backend. The conversion function then fills up the\nprovided buffer exactly - but does not null terminate the string.\n\nThis flaw can lead to stack contents accidently getting returned as part of\nthe converted string."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-126 Buffer Over-read",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-07-24T07:40:07.072Z",
        "orgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
        "shortName": "curl"
      },
      "references": [
        {
          "name": "json",
          "url": "https://curl.se/docs/CVE-2024-6874.json"
        },
        {
          "name": "www",
          "url": "https://curl.se/docs/CVE-2024-6874.html"
        },
        {
          "name": "issue",
          "url": "https://hackerone.com/reports/2604391"
        },
        {
          "url": "http://www.openwall.com/lists/oss-security/2024/07/24/2"
        }
      ],
      "title": "macidn punycode buffer overread"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
    "assignerShortName": "curl",
    "cveId": "CVE-2024-6874",
    "datePublished": "2024-07-24T07:36:26.887Z",
    "dateReserved": "2024-07-18T03:37:32.294Z",
    "dateUpdated": "2025-02-13T17:58:00.151Z",
    "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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GHSA-CHHH-4XRF-42PG

CVE-2024-6874 (GCVE-0-2024-6874)

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