ubuntu-cve-2020-12762
Vulnerability from osv_ubuntu
Published
2020-05-09 18:15
Modified
2026-04-22 07:39
Summary
Details

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
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "libjson-c2",
            "binary_version": "0.11-3ubuntu1.2+esm3"
          },
          {
            "binary_name": "libjson0",
            "binary_version": "0.11-3ubuntu1.2+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "json-c",
        "purl": "pkg:deb/ubuntu/json-c@0.11-3ubuntu1.2+esm3?arch=source\u0026distro=trusty/esm"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.11-3ubuntu1.2+esm3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.11-2ubuntu1",
        "0.11-3ubuntu1",
        "0.11-3ubuntu1.2",
        "0.11-3ubuntu1.2+esm1",
        "0.11-3ubuntu1.2+esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libjson-c2",
            "binary_version": "0.11-4ubuntu2.6"
          },
          {
            "binary_name": "libjson0",
            "binary_version": "0.11-4ubuntu2.6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "json-c",
        "purl": "pkg:deb/ubuntu/json-c@0.11-4ubuntu2.6?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.11-4ubuntu2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.11-4ubuntu2",
        "0.11-4ubuntu2.1",
        "0.11-4ubuntu2.2",
        "0.11-4ubuntu2.5"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libjson-c3",
            "binary_version": "0.12.1-1.3ubuntu0.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "json-c",
        "purl": "pkg:deb/ubuntu/json-c@0.12.1-1.3ubuntu0.3?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.12.1-1.3ubuntu0.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.12.1-1.2",
        "0.12.1-1.3",
        "0.12.1-1.3ubuntu0.1",
        "0.12.1-1.3ubuntu0.2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libjson-c4",
            "binary_version": "0.13.1+dfsg-7ubuntu0.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "json-c",
        "purl": "pkg:deb/ubuntu/json-c@0.13.1+dfsg-7ubuntu0.3?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.13.1+dfsg-7ubuntu0.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.13.1+dfsg-4",
        "0.13.1+dfsg-6",
        "0.13.1+dfsg-7",
        "0.13.1+dfsg-7ubuntu0.1",
        "0.13.1+dfsg-7ubuntu0.2"
      ]
    }
  ],
  "aliases": [],
  "details": "json-c through 0.14 has an integer overflow and out-of-bounds write via a large JSON file, as demonstrated by printbuf_memappend.",
  "id": "UBUNTU-CVE-2020-12762",
  "modified": "2026-04-22T07:39:24Z",
  "published": "2020-05-09T18:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-12762"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/json-c/json-c/pull/592"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4360-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4360-4"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-12762"
    }
  ],
  "related": [
    "USN-4360-1",
    "USN-4360-4"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2020-12762"
  ]
}



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