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MediumFix available

pandas, ujson — security advisory

Type: advisorySources: OSVAdvisory ID: UBUNTU-CVE-2021-45958

UltraJSON (aka ujson) through 5.1.0 has a stack-based buffer overflow in Buffer_AppendIndentUnchecked (called from encode). Exploitation can, for example, use a large amount of indentation.

Products
pandas, ujson
Affected versions
0.12.0-2ubuntu1, 0.13.1-2ubuntu1, 0.13.1-2ubuntu2, 0.15.0-2, 0.15.0-2ubuntu1, 0.15.0-2ubuntu2, 0.17.1-3ubuntu2, 0.19.2-5.1ubuntu4, 0.22.0-2ubuntu1, 0.22.0-3, 0.22.0-4, 0.22.0-4ubuntu1, 0.23.3+dfsg-4ubuntu1, 0.23.3+dfsg-4ubuntu5, 0.23.3+dfsg-4ubuntu6, 0.25.3+dfsg-4, 0.25.3+dfsg-4build1, 0.25.3+dfsg-7, 1.1.5+dfsg-2, 1.1.5+dfsg-2ubuntu1, 1.3.5+dfsg-2, 1.3.5+dfsg-2ubuntu1, 1.3.5+dfsg-3, 1.33-1, 1.33-1build1, 1.35-1build2, 1.35-2, 1.35-3build1, 1.35-3build2, 1.35-4, 1.35-4build1, 1.5.3+dfsg-10, 1.5.3+dfsg-6, 1.5.3+dfsg-6ubuntu1, 1.5.3+dfsg-7ubuntu1, 2.1.4+dfsg-4ubuntu2, 2.1.4+dfsg-7, 2.2.3+dfsg-8build1, 2.2.3+dfsg-9, 2.3.3+dfsg-1ubuntu1, 2.3.3+dfsg-3, 2.3.3+dfsg-3ubuntu1, 2.3.3+dfsg-3ubuntu3, 4.0.2-1, 4.0.2-1build1, 4.2.0-1, 5.1.0-1, 5.1.0-1build1
Fixed versions
1.33-1ubuntu0.1~esm2, 1.35-2ubuntu0.1~esm1, 1.35-4ubuntu0.1, 5.1.0-1ubuntu0.1~esm1
CVEs
CVE-2021-45958
Confirmed fixed CVEs
Not specified
Updated in this feed
31 Oct 2026, 00:39 UTC · Revision 1

Source evidence

UBUNTU-CVE-2021-45958

core-osv · Original source

Published 1 Jan 2022, 00:15 UTC

UltraJSON (aka ujson) through 5.1.0 has a stack-based buffer overflow in Buffer_AppendIndentUnchecked (called from encode). Exploitation can, for example, use a large amount of indentation.

osv:UBUNTU-CVE-2021-45958

pandas

Fixed versions: Not specified

ujson

Fixed versions: 1.33-1ubuntu0.1~esm2

pandas

Fixed versions: Not specified

pandas

Fixed versions: Not specified

ujson

Fixed versions: 1.35-2ubuntu0.1~esm1

ujson

Fixed versions: 1.35-4ubuntu0.1

pandas

Fixed versions: Not specified

pandas

Fixed versions: Not specified

ujson

Fixed versions: 5.1.0-1ubuntu0.1~esm1

pandas

Fixed versions: Not specified

pandas

Fixed versions: Not specified

pandas

Fixed versions: Not specified

pandas

Fixed versions: Not specified

Complete source record
{
  "id": "04750fcc62b70edb04b33155ea6793d8fba79adf8c6ac6a5719073b0e8eec7e4",
  "url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-45958",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UBUNTU-CVE-2021-45958",
    "summary": "UltraJSON (aka ujson) through 5.1.0 has a stack-based buffer overflow in Buffer_AppendIndentUnchecked (called from encode). Exploitation can, for example, use a large amount of indentation.",
    "evidence": "osv:UBUNTU-CVE-2021-45958",
    "products": [
      {
        "name": {
          "value": "pandas",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.12.0-2ubuntu1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.13.1-2ubuntu1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.13.1-2ubuntu2",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "ujson",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.33-1ubuntu0.1~esm2",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": [
          {
            "value": "1.33-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.33-1build1",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "pandas",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.15.0-2",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "0.15.0-2ubuntu1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "0.15.0-2ubuntu2",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "0.17.1-3ubuntu2",
            "evidence": "/affected/2/versions"
          }
        ]
      },
      {
        "name": {
          "value": "pandas",
          "evidence": "/affected/3/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.19.2-5.1ubuntu4",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "0.22.0-2ubuntu1",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "0.22.0-3",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "0.22.0-4",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "0.22.0-4ubuntu1",
            "evidence": "/affected/3/versions"
          }
        ]
      },
      {
        "name": {
          "value": "ujson",
          "evidence": "/affected/4/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.35-2ubuntu0.1~esm1",
            "evidence": "/affected/4/ranges"
          }
        ],
        "affected_versions": [
          {
            "value": "1.35-1build2",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "1.35-2",
            "evidence": "/affected/4/versions"
          }
        ]
      },
      {
        "name": {
          "value": "ujson",
          "evidence": "/affected/5/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.35-4ubuntu0.1",
            "evidence": "/affected/5/ranges"
          }
        ],
        "affected_versions": [
          {
            "value": "1.35-3build1",
            "evidence": "/affected/5/versions"
          },
          {
            "value": "1.35-3build2",
            "evidence": "/affected/5/versions"
          },
          {
            "value": "1.35-4",
            "evidence": "/affected/5/versions"
          },
          {
            "value": "1.35-4build1",
            "evidence": "/affected/5/versions"
          }
        ]
      },
      {
        "name": {
          "value": "pandas",
          "evidence": "/affected/6/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.23.3+dfsg-4ubuntu1",
            "evidence": "/affected/6/versions"
          },
          {
            "value": "0.23.3+dfsg-4ubuntu5",
            "evidence": "/affected/6/versions"
          },
          {
            "value": "0.23.3+dfsg-4ubuntu6",
            "evidence": "/affected/6/versions"
          },
          {
            "value": "0.25.3+dfsg-4",
            "evidence": "/affected/6/versions"
          },
          {
            "value": "0.25.3+dfsg-4build1",
            "evidence": "/affected/6/versions"
          },
          {
            "value": "0.25.3+dfsg-7",
            "evidence": "/affected/6/versions"
          }
        ]
      },
      {
        "name": {
          "value": "pandas",
          "evidence": "/affected/7/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.1.5+dfsg-2",
            "evidence": "/affected/7/versions"
          },
          {
            "value": "1.1.5+dfsg-2ubuntu1",
            "evidence": "/affected/7/versions"
          },
          {
            "value": "1.3.5+dfsg-2",
            "evidence": "/affected/7/versions"
          },
          {
            "value": "1.3.5+dfsg-2ubuntu1",
            "evidence": "/affected/7/versions"
          },
          {
            "value": "1.3.5+dfsg-3",
            "evidence": "/affected/7/versions"
          }
        ]
      },
      {
        "name": {
          "value": "ujson",
          "evidence": "/affected/8/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.1.0-1ubuntu0.1~esm1",
            "evidence": "/affected/8/ranges"
          }
        ],
        "affected_versions": [
          {
            "value": "4.0.2-1",
            "evidence": "/affected/8/versions"
          },
          {
            "value": "4.0.2-1build1",
            "evidence": "/affected/8/versions"
          },
          {
            "value": "4.2.0-1",
            "evidence": "/affected/8/versions"
          },
          {
            "value": "5.1.0-1",
            "evidence": "/affected/8/versions"
          },
          {
            "value": "5.1.0-1build1",
            "evidence": "/affected/8/versions"
          }
        ]
      },
      {
        "name": {
          "value": "pandas",
          "evidence": "/affected/9/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.5.3+dfsg-6",
            "evidence": "/affected/9/versions"
          },
          {
            "value": "1.5.3+dfsg-6ubuntu1",
            "evidence": "/affected/9/versions"
          },
          {
            "value": "1.5.3+dfsg-7ubuntu1",
            "evidence": "/affected/9/versions"
          },
          {
            "value": "1.5.3+dfsg-10",
            "evidence": "/affected/9/versions"
          },
          {
            "value": "2.1.4+dfsg-4ubuntu2",
            "evidence": "/affected/9/versions"
          },
          {
            "value": "2.1.4+dfsg-7",
            "evidence": "/affected/9/versions"
          }
        ]
      },
      {
        "name": {
          "value": "pandas",
          "evidence": "/affected/10/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2.2.3+dfsg-8build1",
            "evidence": "/affected/10/versions"
          },
          {
            "value": "2.2.3+dfsg-9",
            "evidence": "/affected/10/versions"
          }
        ]
      },
      {
        "name": {
          "value": "pandas",
          "evidence": "/affected/11/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2.3.3+dfsg-3ubuntu1",
            "evidence": "/affected/11/versions"
          },
          {
            "value": "2.3.3+dfsg-3ubuntu3",
            "evidence": "/affected/11/versions"
          }
        ]
      },
      {
        "name": {
          "value": "pandas",
          "evidence": "/affected/12/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2.2.3+dfsg-9",
            "evidence": "/affected/12/versions"
          },
          {
            "value": "2.3.3+dfsg-1ubuntu1",
            "evidence": "/affected/12/versions"
          },
          {
            "value": "2.3.3+dfsg-3",
            "evidence": "/affected/12/versions"
          },
          {
            "value": "2.3.3+dfsg-3ubuntu1",
            "evidence": "/affected/12/versions"
          }
        ]
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "UBUNTU-CVE-2021-45958",
      "aliases": [
        "UBUNTU-CVE-2021-45958"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
        },
        {
          "type": "Ubuntu",
          "score": "medium"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "pandas",
            "purl": "pkg:deb/ubuntu/pandas?arch=source&distro=trusty",
            "ecosystem": "Ubuntu:14.04:LTS"
          },
          "versions": [
            "0.12.0-2ubuntu1",
            "0.13.1-2ubuntu1",
            "0.13.1-2ubuntu2"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-45958.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "python-pandas",
                "binary_version": "0.13.1-2ubuntu2"
              },
              {
                "binary_name": "python-pandas-lib",
                "binary_version": "0.13.1-2ubuntu2"
              },
              {
                "binary_name": "python3-pandas",
                "binary_version": "0.13.1-2ubuntu2"
              },
              {
                "binary_name": "python3-pandas-lib",
                "binary_version": "0.13.1-2ubuntu2"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.33-1ubuntu0.1~esm2"
                }
              ]
            }
          ],
          "package": {
            "name": "ujson",
            "purl": "pkg:deb/ubuntu/ujson?arch=source&distro=esm-apps%2Fxenial",
            "ecosystem": "Ubuntu:Pro:16.04:LTS"
          },
          "versions": [
            "1.33-1",
            "1.33-1build1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-45958.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "python-ujson",
                "binary_version": "1.33-1ubuntu0.1~esm2"
              },
              {
                "binary_name": "python3-ujson",
                "binary_version": "1.33-1ubuntu0.1~esm2"
              }
            ],
            "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "pandas",
            "purl": "pkg:deb/ubuntu/pandas?arch=source&distro=xenial",
            "ecosystem": "Ubuntu:16.04:LTS"
          },
          "versions": [
            "0.15.0-2",
            "0.15.0-2ubuntu1",
            "0.15.0-2ubuntu2",
            "0.17.1-3ubuntu2"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-45958.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "python-pandas",
                "binary_version": "0.17.1-3ubuntu2"
              },
              {
                "binary_name": "python-pandas-lib",
                "binary_version": "0.17.1-3ubuntu2"
              },
              {
                "binary_name": "python3-pandas",
                "binary_version": "0.17.1-3ubuntu2"
              },
              {
                "binary_name": "python3-pandas-lib",
                "binary_version": "0.17.1-3ubuntu2"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "pandas",
            "purl": "pkg:deb/ubuntu/pandas?arch=source&distro=bionic",
            "ecosystem": "Ubuntu:18.04:LTS"
          },
          "versions": [
            "0.19.2-5.1ubuntu4",
            "0.22.0-2ubuntu1",
            "0.22.0-3",
            "0.22.0-4",
            "0.22.0-4ubuntu1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-45958.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "python-pandas",
                "binary_version": "0.22.0-4ubuntu1"
              },
              {
                "binary_name": "python-pandas-lib",
                "binary_version": "0.22.0-4ubuntu1"
              },
              {
                "binary_name": "python3-pandas",
                "binary_version": "0.22.0-4ubuntu1"
              },
              {
                "binary_name": "python3-pandas-lib",
                "binary_version": "0.22.0-4ubuntu1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.35-2ubuntu0.1~esm1"
                }
              ]
            }
          ],
          "package": {
            "name": "ujson",
            "purl": "pkg:deb/ubuntu/ujson?arch=source&distro=esm-apps%2Fbionic",
            "ecosystem": "Ubuntu:Pro:18.04:LTS"
          },
          "versions": [
            "1.35-1build2",
            "1.35-2"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-45958.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "python-ujson",
                "binary_version": "1.35-2ubuntu0.1~esm1"
              },
              {
                "binary_name": "python3-ujson",
                "binary_version": "1.35-2ubuntu0.1~esm1"
              }
            ],
            "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.35-4ubuntu0.1"
                }
              ]
            }
          ],
          "package": {
            "name": "ujson",
            "purl": "pkg:deb/ubuntu/ujson?arch=source&distro=focal",
            "ecosystem": "Ubuntu:20.04:LTS"
          },
          "versions": [
            "1.35-3build1",
            "1.35-3build2",
            "1.35-4",
            "1.35-4build1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-45958.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "python3-ujson",
                "binary_version": "1.35-4ubuntu0.1"
              }
            ],
            "availability": "No subscription required"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "pandas",
            "purl": "pkg:deb/ubuntu/pandas?arch=source&distro=focal",
            "ecosystem": "Ubuntu:20.04:LTS"
          },
          "versions": [
            "0.23.3+dfsg-4ubuntu1",
            "0.23.3+dfsg-4ubuntu5",
            "0.23.3+dfsg-4ubuntu6",
            "0.25.3+dfsg-4",
            "0.25.3+dfsg-4build1",
            "0.25.3+dfsg-7"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-45958.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "python3-pandas",
                "binary_version": "0.25.3+dfsg-7"
              },
              {
                "binary_name": "python3-pandas-lib",
                "binary_version": "0.25.3+dfsg-7"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "pandas",
            "purl": "pkg:deb/ubuntu/pandas?arch=source&distro=jammy",
            "ecosystem": "Ubuntu:22.04:LTS"
          },
          "versions": [
            "1.1.5+dfsg-2",
            "1.1.5+dfsg-2ubuntu1",
            "1.3.5+dfsg-2",
            "1.3.5+dfsg-2ubuntu1",
            "1.3.5+dfsg-3"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-45958.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "python3-pandas",
                "binary_version": "1.3.5+dfsg-3"
              },
              {
                "binary_name": "python3-pandas-lib",
                "binary_version": "1.3.5+dfsg-3"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "5.1.0-1ubuntu0.1~esm1"
                }
              ]
            }
          ],
          "package": {
            "name": "ujson",
            "purl": "pkg:deb/ubuntu/ujson?arch=source&distro=esm-apps%2Fjammy",
            "ecosystem": "Ubuntu:Pro:22.04:LTS"
          },
          "versions": [
            "4.0.2-1",
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      ],
      "modified": "2026-10-17T12:55:55.575546555Z",
      "provider": "osv",
      "upstream": [
        "CVE-2021-45958"
      ],
      "references": [
        "https://ubuntu.com/security/CVE-2021-45958",
        "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=36009",
        "https://github.com/google/oss-fuzz-vulns/blob/main/vulns/ujson/OSV-2021-955.yaml",
        "https://ubuntu.com/security/notices/USN-6629-1",
        "https://ubuntu.com/security/notices/USN-6629-2",
        "https://www.cve.org/CVERecord?id=CVE-2021-45958"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2021-45958",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 354305,
  "published_at": "2022-01-01T00:15:00+00:00"
}