{"schemaVersion":3,"id":"CVE-2001-0239","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Microsoft Internet Security and Acceleration (ISA) Server 2000 Web Proxy allows remote attackers to cause a denial of service via a long web request with a specific type.","dates":{"published":"2001-09-18T04:00:00.000Z","modified":"2024-08-08T04:14:06.696Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.5,"severity":"high","version":"2.0","versionLabel":"v2.0","source":"NVD","vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","computed":false,"selection":"backend-summary"},"metrics":[{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":7.5,"severity":"high","vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.27962,"percentile":0.98089,"severity":"high","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.27962},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.27962,"percentile":0.98089}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.27962,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.27962,"percentile":0.98089}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[{"id":"REF_EACD8FB96848F074","name":"Exploit Reference (securityfocus.com)","source":"reference","url":"http://www.securityfocus.com/archive/1/176912","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null},{"id":"REF_FBDD17A892A8E0E4","name":"Exploit Reference (securityfocus.com)","source":"reference","url":"http://www.securityfocus.com/archive/1/179986","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null},{"id":"REF_54F8CE498CC54751","name":"Exploit Reference (securityfocus.com)","source":"reference","url":"http://www.securityfocus.com/bid/2600","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null},{"id":"20763","name":"Microsoft ISA Server 2000 Web Proxy - Denial of Service","source":"exploit-database","url":"https://www.exploit-db.com/exploits/20763","maturity":"poc","reliabilityScore":0.8,"verified":true,"type":"dos","platforms":["windows"],"requiresAuth":null,"exploitdb":{"verified":true,"type":"dos","platform":"windows","file":"exploits/windows/dos/20763.c","codes":["CVE-2001-0239","OSVDB-1789"]},"metasploit":null}],"exploitCount":4,"weaknesses":[],"affected":[{"vendor":"microsoft","product":"isa_server","name":"isa server","label":"isa_server","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"2000","noFixRecorded":false,"fixedIn":null}],"versionsText":"2000","eol":null,"hubHref":"/vendor/microsoft/isa_server"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"http://www.securityfocus.com/archive/1/176912","label":"www.securityfocus.com/archive/1/176912","hostname":"www.securityfocus.com","tags":["Mailing List","X Refsource BUGTRAQ","Exploit","Vendor Advisory"]},{"url":"http://www.securityfocus.com/archive/1/177160","label":"www.securityfocus.com/archive/1/177160","hostname":"www.securityfocus.com","tags":["Mailing List","X Refsource BUGTRAQ","Vendor Advisory"]},{"url":"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-021","label":"docs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-021","hostname":"docs.microsoft.com","tags":["Vendor Advisory","X Refsource MS"]},{"url":"http://www.securityfocus.com/archive/1/179986","label":"www.securityfocus.com/archive/1/179986","hostname":"www.securityfocus.com","tags":["Mailing List","X Refsource BUGTRAQ","Exploit","Vendor Advisory"]},{"url":"http://www.securityfocus.com/bid/2600","label":"www.securityfocus.com/bid/2600","hostname":"www.securityfocus.com","tags":["VDB Entry","X Refsource BID","Exploit","Patch","Vendor Advisory"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/6383","label":"exchange.xforce.ibmcloud.com/vulnerabilities/6383","hostname":"exchange.xforce.ibmcloud.com","tags":["VDB Entry","X Refsource XF"]},{"url":"http://www.ciac.org/ciac/bulletins/l-073.shtml","label":"www.ciac.org/ciac/bulletins/l-073.shtml","hostname":"www.ciac.org","tags":["Third Party Advisory","Government Resource","X Refsource CIAC"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2001-09-18T04:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-08T04:14:06.696Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":46,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T20:28:53.956Z","stale":false,"partial":false}}