ubuntu-cve-2021-31870
Vulnerability from osv_ubuntu
Published
2021-04-30 06:15
Modified
2026-04-22 07:40
Summary
Details

An issue was discovered in klibc before 2.0.9. Multiplication in the calloc() function may result in an integer overflow and a subsequent heap buffer overflow.

Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
N/A (UNKNOWN)
low
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "klibc-utils",
            "binary_version": "2.0.3-0ubuntu1.14.04.3+esm2"
          },
          {
            "binary_name": "libklibc",
            "binary_version": "2.0.3-0ubuntu1.14.04.3+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "klibc",
        "purl": "pkg:deb/ubuntu/klibc@2.0.3-0ubuntu1.14.04.3+esm2?arch=source\u0026distro=trusty/esm"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.0.3-0ubuntu1.14.04.3+esm2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.0.1-3.1ubuntu2",
        "2.0.2-1ubuntu1",
        "2.0.2-1ubuntu2",
        "2.0.3-0ubuntu1",
        "2.0.3-0ubuntu1.14.04.1",
        "2.0.3-0ubuntu1.14.04.2",
        "2.0.3-0ubuntu1.14.04.3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "klibc-utils",
            "binary_version": "2.0.4-8ubuntu1.16.04.4+esm1"
          },
          {
            "binary_name": "libklibc",
            "binary_version": "2.0.4-8ubuntu1.16.04.4+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "klibc",
        "purl": "pkg:deb/ubuntu/klibc@2.0.4-8ubuntu1.16.04.4+esm1?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.0.4-8ubuntu1.16.04.4+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.0.3-0ubuntu1",
        "2.0.4-4",
        "2.0.4-6",
        "2.0.4-7",
        "2.0.4-8",
        "2.0.4-8ubuntu1",
        "2.0.4-8ubuntu1.16.04.1",
        "2.0.4-8ubuntu1.16.04.2",
        "2.0.4-8ubuntu1.16.04.3",
        "2.0.4-8ubuntu1.16.04.4"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "klibc-utils",
            "binary_version": "2.0.4-9ubuntu2.1"
          },
          {
            "binary_name": "libklibc",
            "binary_version": "2.0.4-9ubuntu2.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "klibc",
        "purl": "pkg:deb/ubuntu/klibc@2.0.4-9ubuntu2.1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.0.4-9ubuntu2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.0.4-9ubuntu1",
        "2.0.4-9ubuntu2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "klibc-utils",
            "binary_version": "2.0.7-1ubuntu5.1"
          },
          {
            "binary_name": "libklibc",
            "binary_version": "2.0.7-1ubuntu5.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "klibc",
        "purl": "pkg:deb/ubuntu/klibc@2.0.7-1ubuntu5.1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.0.7-1ubuntu5.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.0.6-1ubuntu1",
        "2.0.6-1ubuntu2",
        "2.0.7-1ubuntu1",
        "2.0.7-1ubuntu3",
        "2.0.7-1ubuntu4",
        "2.0.7-1ubuntu5"
      ]
    }
  ],
  "aliases": [],
  "details": "An issue was discovered in klibc before 2.0.9. Multiplication in the calloc() function may result in an integer overflow and a subsequent heap buffer overflow.",
  "id": "UBUNTU-CVE-2021-31870",
  "modified": "2026-04-22T07:40:02Z",
  "published": "2021-04-30T06:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-31870"
    },
    {
      "type": "REPORT",
      "url": "https://kernel.org/pub/linux/libs/klibc/2.0/"
    },
    {
      "type": "REPORT",
      "url": "https://lists.zytor.com/archives/klibc/2021-April/004593.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5379-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-31870"
    }
  ],
  "related": [
    "USN-5379-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "low",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-31870"
  ]
}



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