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CVE-2024-6197 (GCVE-0-2024-6197)

Vulnerability from cvelistv5 – Published: 2024-07-24 07:29 – Updated: 2025-02-13 17:54
VLAI
Title
freeing stack buffer in utf8asn1str
Summary
libcurl's ASN1 parser has this utf8asn1str() function used for parsing an ASN.1 UTF-8 string. Itcan detect an invalid field and return error. Unfortunately, when doing so it also invokes `free()` on a 4 byte localstack buffer. Most modern malloc implementations detect this error and immediately abort. Some however accept the input pointer and add that memory to its list of available chunks. This leads to the overwriting of nearby stack memory. The content of the overwrite is decided by the `free()` implementation; likely to be memory pointers and a set of flags. The most likely outcome of exploting this flaw is a crash, although it cannot be ruled out that more serious results can be had in special circumstances.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-07-24 18:42 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
curl curl Affected: 8.8.0 , ≤ 8.8.0 (semver)
Affected: 8.7.1 , ≤ 8.7.1 (semver)
Affected: 8.7.0 , ≤ 8.7.0 (semver)
Affected: 8.6.0 , ≤ 8.6.0 (semver)
guessed Create a notification for this product.
curl curl Affected: 8.6.0 , ≤ 8.8.0 (custom)
    cpe:2.3:a:curl:curl:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
z2_ z2_
Show details on NVD website
To clipboard 

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              "url": "https://curl.se/docs/CVE-2024-6197.json"
            },
            {
              "name": "www",
              "url": "https://curl.se/docs/CVE-2024-6197.html"
            },
            {
              "name": "issue",
              "url": "https://hackerone.com/reports/2559516"
            },
            {
              "url": "http://www.openwall.com/lists/oss-security/2024/07/24/1"
            },
            {
              "url": "http://www.openwall.com/lists/oss-security/2024/07/24/5"
            }
          ],
          "title": "freeing stack buffer in utf8asn1str"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
        "assignerShortName": "curl",
        "cveId": "CVE-2024-6197",
        "datePublished": "2024-07-24T07:29:50.003Z",
        "dateReserved": "2024-06-20T07:20:43.202Z",
        "dateUpdated": "2024-11-29T12:04:44.300Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.