{"id":"CVE-2011-1753","aliases":["DEBIAN-CVE-2011-1753","DSA-2248-1","EUVD-2011-1752","GHSA-35cw-298h-r635"],"status":"published","title":"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...","description":"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.","severity":{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.02125,"percentile":0.82036,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-399"],"published":"2011-05-31T00:00:00Z","modified":"2026-10-23T17:47:38Z","fixes":[{"ecosystem":"Debian:12","package":"ejabberd","fixed_in":["2.1.6-2.1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"ejabberd","fixed_in":["2.1.6-2.1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"ejabberd","fixed_in":["2.1.6-2.1"],"sources":["osv"]},{"ecosystem":"Debian:6.0","package":"ejabberd","fixed_in":["2.1.5-3+squeeze1"],"sources":["osv"]},{"ecosystem":"Debian:5.0","package":"ejabberd","fixed_in":["2.0.1-6+lenny3"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"ejabberd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.6-2.1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"ejabberd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.6-2.1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"ejabberd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.6-2.1"}]}]},{"source":"osv","ecosystem":"Debian:6.0","package":"ejabberd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.5-3+squeeze1"}]}],"versions":["2.1.5-3","2.1.5-3+squeeze1~bpo50+1"]},{"source":"osv","ecosystem":"Debian:5.0","package":"ejabberd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.1-6+lenny3"}]}],"versions":["2.0.1-5","2.0.1-6","2.0.1-6+lenny1","2.0.1-6+lenny1~bpo40+1","2.0.1-6+lenny2","2.0.1-6~bpo40+1"]}],"products":[{"vendor":"process-one","product":"ejabberd"},{"vendor":"process-one","product":"exmpp"}],"references":[{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/67769","tags":["vdb-entry","x_refsource_XF","x_transferred","web"]},{"url":"http://www.debian.org/security/2011/dsa-2248","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","advisory"]},{"url":"http://www.process-one.net/en/ejabberd/release_notes/release_note_ejabberd_2.1.7/","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"http://secunia.com/advisories/44765","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory","advisory"]},{"url":"https://git.process-one.net/ejabberd/mainline/commit/bd1df027c622e1f96f9eeaac612a6a956c1ff0b6","tags":["x_refsource_CONFIRM","x_transferred","Patch","fix"]},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2011-June/062099.html","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"http://www.ejabberd.im/ejabberd-2.1.7","tags":["x_refsource_CONFIRM","x_transferred","Patch","fix"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=700454","tags":["x_refsource_CONFIRM","x_transferred","report"]},{"url":"http://secunia.com/advisories/44807","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory","advisory"]},{"url":"http://www.securityfocus.com/bid/48072","tags":["vdb-entry","x_refsource_BID","x_transferred","web"]},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2011-June/062145.html","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"http://secunia.com/advisories/45120","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-1753"},{"url":"http://www.process-one.net/en/ejabberd/release_notes/release_note_ejabberd_2.1.7"},{"url":"https://github.com/advisories/GHSA-35cw-298h-r635"},{"url":"https://security-tracker.debian.org/tracker/CVE-2011-1753","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2011-1753","description":"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.","status":"published","published":"2011-06-21T01:00:00Z","modified":"2024-08-06T22:37:25.777Z","updated_at":"2026-11-02T14:35:38.711857Z"}],"euvd":[{"id":"EUVD-2011-1752","description":"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.","status":"published","published":"2011-06-21T01:00:00Z","modified":"2024-08-06T22:37:25Z","updated_at":"2026-11-03T01:55:55.207376Z"}],"ghsa":[{"id":"GHSA-35cw-298h-r635","title":"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...","description":"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.","status":"published","published":"2022-05-17T01:59:37Z","modified":"2025-04-11T03:49:05Z","updated_at":"2026-11-02T15:01:08.691526Z"}],"nvd":[{"id":"CVE-2011-1753","description":"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.","status":"published","published":"2011-06-21T02:52:42.763Z","modified":"2026-06-16T23:29:57.627Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-399"],"updated_at":"2026-11-02T14:02:08.47516Z"}],"osv":[{"id":"CVE-2011-1753","description":"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.","status":"published","published":"2011-06-21T02:52:42Z","modified":"2026-04-10T03:41:45.145941Z","updated_at":"2026-11-02T15:43:58.279353Z"},{"id":"DEBIAN-CVE-2011-1753","description":"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.","status":"published","published":"2011-06-21T02:52:42.763Z","modified":"2026-10-23T17:47:38.375706535Z","updated_at":"2026-11-02T15:45:24.612044Z"},{"id":"DSA-2248-1","title":"ejabberd - denial of service","status":"published","published":"2011-05-31T00:00:00Z","modified":"2026-03-09T01:19:36.690603Z","updated_at":"2026-11-02T15:46:15.108335Z"}]}}