CVE-2020-12762 (GCVE-0-2020-12762)

Vulnerability from cvelistv5 – Published: 2020-05-09 00:00 – Updated: 2025-11-03 19:25
VLAI
Summary
json-c through 0.14 has an integer overflow and out-of-bounds write via a large JSON file, as demonstrated by printbuf_memappend.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-05-30 19:18 UTC
CWE
  • n/a
  • CWE-787 - Out-of-bounds Write
Assigner
References
Show details on NVD website
To clipboard 

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      "title": "json-c through 0.14 has an integer overflow and out-of-bounds write via a large JSON file as demonstrated by printbuf_memappend.",
      "url": "https://msrc.microsoft.com/csaf/vex/2020/msrc_cve-2020-12762.json",
      "version": "2"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2020-12762\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2020-05-09T18:15:11.283\",\"lastModified\":\"2025-11-03T20:15:44.663\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"json-c through 0.14 has an integer overflow and out-of-bounds write via a large JSON file, as demonstrated by printbuf_memappend.\"},{\"lang\":\"es\",\"value\":\"json-c versiones hasta 0.14, presenta un desbordamiento de enteros y una escritura fuera de l\u00edmites por medio de un archivo JSON grande, como es demostrado por la funci\u00f3n 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      "status": "interim",
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      "cveMetadata": "{\"cveId\": \"CVE-2020-12762\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-03T19:25:29.557Z\", \"dateReserved\": \"2020-05-09T00:00:00.000Z\", \"assignerOrgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"datePublished\": \"2020-05-09T00:00:00.000Z\", \"assignerShortName\": \"mitre\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.