ejabberd — security advisory

{
  "id": "56c9b3b778a850f2915b02de8325555db6aab939c88ea7d4202a8fabb3ba311c",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2011-1753",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2011-1753",
    "summary": "expat_erl.c in ejabberd before 2.1.7 and 3.x before 3.0.0-alpha-3, and exmpp before 0.9.7, does not properly detect recursion during entity expansion, which allows remote attackers to cause a denial of service (memory and CPU consumption) via a crafted XML document containing a large number of nested entity references, a similar issue to CVE-2003-1564.",
    "evidence": "osv:DEBIAN-CVE-2011-1753",
    "products": [
      {
        "name": {
          "value": "ejabberd",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.1.6-2.1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "ejabberd",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.1.6-2.1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "ejabberd",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.1.6-2.1",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "DEBIAN-CVE-2011-1753",
      "aliases": [
        "DEBIAN-CVE-2011-1753"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.1.6-2.1"
                }
              ]
            }
          ],
          "package": {
            "name": "ejabberd",
            "purl": "pkg:deb/debian/ejabberd?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2011-1753.json"
          },
          "ecosystem_specific": {
            "urgency": "medium"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.1.6-2.1"
                }
              ]
            }
          ],
          "package": {
            "name": "ejabberd",
            "purl": "pkg:deb/debian/ejabberd?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2011-1753.json"
          },
          "ecosystem_specific": {
            "urgency": "medium"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.1.6-2.1"
                }
              ]
            }
          ],
          "package": {
            "name": "ejabberd",
            "purl": "pkg:deb/debian/ejabberd?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2011-1753.json"
          },
          "ecosystem_specific": {
            "urgency": "medium"
          }
        }
      ],
      "modified": "2026-10-23T17:47:38.375706535Z",
      "provider": "osv",
      "upstream": [
        "CVE-2011-1753"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2011-1753"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2011-1753",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 418078,
  "published_at": "2011-06-21T02:52:42.763+00:00"
}