FKIE_CVE-2024-6874

Vulnerability from fkie_nvd - Published: 2024-07-24 08:15 - Updated: 2024-11-21 09:50
Severity ?
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
3.1 (Low) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
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.
References
2499f714-1537-4658-8207-48ae4bb9eae9http://www.openwall.com/lists/oss-security/2024/07/24/2Mailing List, Third Party Advisory
2499f714-1537-4658-8207-48ae4bb9eae9https://curl.se/docs/CVE-2024-6874.htmlVendor Advisory
2499f714-1537-4658-8207-48ae4bb9eae9https://curl.se/docs/CVE-2024-6874.jsonVendor Advisory
2499f714-1537-4658-8207-48ae4bb9eae9https://hackerone.com/reports/2604391Exploit, Issue Tracking, Technical Description
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2024/07/24/2Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://curl.se/docs/CVE-2024-6874.htmlVendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://curl.se/docs/CVE-2024-6874.jsonVendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://hackerone.com/reports/2604391Exploit, Issue Tracking, Technical Description
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20240822-0004/
Impacted products
Vendor Product Version
haxx libcurl 8.8.0
To clipboard 

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      "nodes": [
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              "criteria": "cpe:2.3:a:haxx:libcurl:8.8.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "759E33B7-1F1E-4050-A400-A2176BF35469",
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  "cveTags": [],
  "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."
    },
    {
      "lang": "es",
      "value": "La funci\u00f3n API de URL de libcurl [curl_url_get()](https://curl.se/libcurl/c/curl_url_get.html) ofrece conversiones punycode, hacia y desde IDN. Al solicitar convertir un nombre que tiene exactamente 256 bytes, libcurl termina leyendo fuera de un b\u00fafer en la regi\u00f3n stack de la memoria cuando se construye para usar el backend IDN *macidn*. Luego, la funci\u00f3n de conversi\u00f3n llena exactamente el b\u00fafer proporcionado, pero no termina en nulo la cadena. Esta falla puede provocar que el contenido de la pila se devuelva accidentalmente como parte de la cadena convertida."
    }
  ],
  "id": "CVE-2024-6874",
  "lastModified": "2024-11-21T09:50:26.493",
  "metrics": {
    "cvssMetricV31": [
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
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          "userInteraction": "NONE",
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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  "published": "2024-07-24T08:15:03.413",
  "references": [
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  "vulnStatus": "Modified",
  "weaknesses": [
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          "value": "CWE-125"
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      "source": "nvd@nist.gov",
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}


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Detection rules are retrieved from Rulezet.