USN-5133-1 (UBUNTU-CVE-2020-21913)

Vulnerability from osv_ubuntu – Published: 2021-11-04 20:12 – Updated: 2026-06-29 10:52 – Source website
VLAI
Summary
A security issue was fixed in ICU
Details

It was discovered that ICU contains a use after free issue. An attacker could use this issue to cause a denial of service with crafted input.

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2020-21913",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:14.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "icu-devtools",
            "binary_version": "52.1-3ubuntu0.8+esm2"
          },
          {
            "binary_name": "libicu52",
            "binary_version": "52.1-3ubuntu0.8+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "icu",
        "purl": "pkg:deb/ubuntu/icu@52.1-3ubuntu0.8+esm2?arch=source\u0026distro=trusty/esm"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "52.1-3ubuntu0.8+esm2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.8.1.1-12ubuntu2",
        "4.8.1.1-13+nmu1",
        "4.8.1.1-13+nmu1ubuntu1",
        "52.1-3",
        "52.1-3ubuntu0.2",
        "52.1-3ubuntu0.3",
        "52.1-3ubuntu0.4",
        "52.1-3ubuntu0.5",
        "52.1-3ubuntu0.6",
        "52.1-3ubuntu0.7",
        "52.1-3ubuntu0.8",
        "52.1-3ubuntu0.8+esm1"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2020-21913",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:16.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "icu-devtools",
            "binary_version": "55.1-7ubuntu0.5+esm1"
          },
          {
            "binary_name": "libicu55",
            "binary_version": "55.1-7ubuntu0.5+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "icu",
        "purl": "pkg:deb/ubuntu/icu@55.1-7ubuntu0.5+esm1?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "55.1-7ubuntu0.5+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "55.1-4ubuntu1",
        "55.1-6ubuntu1",
        "55.1-7",
        "55.1-7ubuntu0.1",
        "55.1-7ubuntu0.2",
        "55.1-7ubuntu0.3",
        "55.1-7ubuntu0.4",
        "55.1-7ubuntu0.5"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2020-21913",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "icu-devtools",
            "binary_version": "60.2-3ubuntu3.2"
          },
          {
            "binary_name": "libicu60",
            "binary_version": "60.2-3ubuntu3.2"
          },
          {
            "binary_name": "libiculx60",
            "binary_version": "60.2-3ubuntu3.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "icu",
        "purl": "pkg:deb/ubuntu/icu@60.2-3ubuntu3.2?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "60.2-3ubuntu3.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "57.1-6",
        "59.1-3ubuntu1",
        "60.1-1ubuntu2",
        "60.2-1ubuntu1",
        "60.2-3ubuntu1",
        "60.2-3ubuntu3",
        "60.2-3ubuntu3.1"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that ICU contains a use after free issue.\nAn attacker could use this issue to cause a denial of service with crafted input.\n\n",
  "id": "USN-5133-1",
  "modified": "2026-06-29T10:52:52Z",
  "published": "2021-11-04T20:12:07Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5133-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-21913"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "A security issue was fixed in ICU",
  "upstream": [
    "UBUNTU-CVE-2020-21913"
  ]
}



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