CVE-2023-38546 (GCVE-0-2023-38546)

Vulnerability from cvelistv5 – Published: 2023-10-18 03:51 – Updated: 2026-05-12 10:52
VLAI?
Summary
This flaw allows an attacker to insert cookies at will into a running program using libcurl, if the specific series of conditions are met. libcurl performs transfers. In its API, an application creates "easy handles" that are the individual handles for single transfers. libcurl provides a function call that duplicates en easy handle called [curl_easy_duphandle](https://curl.se/libcurl/c/curl_easy_duphandle.html). If a transfer has cookies enabled when the handle is duplicated, the cookie-enable state is also cloned - but without cloning the actual cookies. If the source handle did not read any cookies from a specific file on disk, the cloned version of the handle would instead store the file name as `none` (using the four ASCII letters, no quotes). Subsequent use of the cloned handle that does not explicitly set a source to load cookies from would then inadvertently load cookies from a file named `none` - if such a file exists and is readable in the current directory of the program using libcurl. And if using the correct file format of course.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
curl curl Affected: 8.4.0 , < 8.4.0 (semver)
Unaffected: 7.9.1 , < 7.9.1 (semver)
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Show details on NVD website
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In its API, an application creates \\\"easy handles\\\"\\nthat are the individual handles for single transfers.\\n\\nlibcurl provides a function call that duplicates en easy handle called\\n[curl_easy_duphandle](https://curl.se/libcurl/c/curl_easy_duphandle.html).\\n\\nIf a transfer has cookies enabled when the handle is duplicated, the\\ncookie-enable state is also cloned - but without cloning the actual\\ncookies. If the source handle did not read any cookies from a specific file on\\ndisk, the cloned version of the handle would instead store the file name as\\n`none` (using the four ASCII letters, no quotes).\\n\\nSubsequent use of the cloned handle that does not explicitly set a source to\\nload cookies from would then inadvertently load cookies from a file named\\n`none` - if such a file exists and is readable in the current directory of the\\nprogram using libcurl. And if using the correct file format of course.\"}], \"providerMetadata\": {\"orgId\": \"36234546-b8fa-4601-9d6f-f4e334aa8ea1\", \"shortName\": \"hackerone\", \"dateUpdated\": \"2024-07-09T13:27:34.245Z\"}}}",
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      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Tags
Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.



Detection rules are retrieved from Rulezet.