Security advisory

{
  "id": "fce7c5426a1428923dee746342a9a604ba3bdf9702cfabfa2b5488a611ac8589",
  "url": "https://osv.dev/vulnerability/CVE-2021-45960",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-45960",
    "summary": "In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function in xmlparse.c can lead to realloc misbehavior (e.g., allocating too few bytes, or only freeing memory).",
    "evidence": "osv:CVE-2021-45960",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-45960",
      "aliases": [
        "CVE-2021-45960"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/libexpat/libexpat",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "57c7da69b78e3698e112a6b5da19d5109b8232d1"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.4.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "R_2_4_2",
            "R_2_4_1",
            "R_2_4_0",
            "R_2_3_0",
            "R_2_2_10",
            "R_2_2_9",
            "R_2_2_8",
            "R_2_2_7",
            "R_2_2_6",
            "R_2_2_5",
            "R_2_2_4",
            "R_2_2_3",
            "R_2_2_2",
            "R_2_2_1",
            "R_2_2_0",
            "R_2_1_1",
            "R_2_1_0",
            "R_2_0_1",
            "R_2_0_0",
            "R_1_95_8",
            "R_1_95_7",
            "R_1_95_6",
            "R_1_95_5",
            "R_1_95_4",
            "R_1_95_3",
            "R_1_95_2",
            "R_1_95_0",
            "libexpat-alpha-1",
            "start",
            "sourceforge_init",
            "jclark-orig",
            "V20000512",
            "V19991013",
            "V19990728",
            "V19990709",
            "V19990626",
            "V1_1",
            "V19990425",
            "V1990307",
            "V19990109",
            "V19981231",
            "V19981122",
            "V1_0",
            "beta4",
            "beta3",
            "beta2",
            "REC1_0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-45960.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:12.520226945Z",
      "provider": "osv",
      "references": [
        "https://cert-portal.siemens.com/productcert/html/ssa-398330.html",
        "https://cert-portal.siemens.com/productcert/html/ssa-484086.html",
        "https://security.gentoo.org/glsa/202209-24",
        "https://security.netapp.com/advisory/ntap-20220121-0004/",
        "https://www.tenable.com/security/tns-2022-05",
        "https://bugzilla.mozilla.org/show_bug.cgi?id=1217609",
        "https://www.debian.org/security/2022/dsa-5073",
        "https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf",
        "https://github.com/libexpat/libexpat/issues/531",
        "https://github.com/libexpat/libexpat/pull/534"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:siemens:sinema_remote_connect_server:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "siemens:sinema_remote_connect_server",
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "3.1"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:a:tenable:nessus:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "tenable:nessus",
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "8.15.3"
                  },
                  {
                    "introduced": "10.0.0"
                  },
                  {
                    "fixed": "10.1.1"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
              "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "10.0"
                  },
                  {
                    "last_affected": "10.0"
                  },
                  {
                    "introduced": "11.0"
                  },
                  {
                    "last_affected": "11.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:a:netapp:hci_baseboard_management_controller:h610c:*:*:*:*:*:*:*",
              "cpe:2.3:a:netapp:hci_baseboard_management_controller:h610s:*:*:*:*:*:*:*",
              "cpe:2.3:a:netapp:hci_baseboard_management_controller:h615c:*:*:*:*:*:*:*"
            ],
            "vendor_product": "netapp:hci_baseboard_management_controller",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "h610c"
                  },
                  {
                    "last_affected": "h610c"
                  },
                  {
                    "introduced": "h610s"
                  },
                  {
                    "last_affected": "h610s"
                  },
                  {
                    "introduced": "h615c"
                  },
                  {
                    "last_affected": "h615c"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-45960",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 384945,
  "published_at": "2022-01-01T19:15:08.03+00:00"
}