{"schemaVersion":3,"id":"CVE-2003-0166","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Integer signedness error in emalloc() function for PHP before 4.3.2 allow remote attackers to cause a denial of service (memory consumption) and possibly execute arbitrary code via negative arguments to functions such as (1) socket_recv, (2) socket_recvfrom, and possibly other functions.","dates":{"published":"2003-03-27T05:00:00.000Z","modified":"2024-08-08T01:43:36.054Z","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":0.14122,"percentile":0.96549,"severity":"medium","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.14122},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.14122,"percentile":0.96549}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.14122,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.14122,"percentile":0.96549}]},"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_D7B500CD03E6489B","name":"Exploit Reference (securityfocus.com)","source":"reference","url":"http://www.securityfocus.com/bid/7198","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null},{"id":"REF_42076935D1C255F6","name":"Exploit Reference (securityfocus.com)","source":"reference","url":"http://www.securityfocus.com/bid/7197","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null},{"id":"22419","name":"PHP 4.3 - 'socket_iovec_alloc()' Integer Overflow","source":"exploit-database","url":"https://www.exploit-db.com/exploits/22419","maturity":"poc","reliabilityScore":0.8,"verified":true,"type":"dos","platforms":["php"],"requiresAuth":null,"exploitdb":{"verified":true,"type":"dos","platform":"php","file":"exploits/php/dos/22419.php","codes":["CVE-2003-0166","OSVDB-13393"]},"metasploit":null},{"id":"22425","name":"PHP 4.x - 'socket_recv()' Signed Integer Memory Corruption","source":"exploit-database","url":"https://www.exploit-db.com/exploits/22425","maturity":"poc","reliabilityScore":0.8,"verified":true,"type":"dos","platforms":["php"],"requiresAuth":null,"exploitdb":{"verified":true,"type":"dos","platform":"php","file":"exploits/php/dos/22425.php","codes":["CVE-2003-0166","OSVDB-13394"]},"metasploit":null},{"id":"22426","name":"PHP 4.x - 'socket_recvfrom()' Signed Integer Memory Corruption","source":"exploit-database","url":"https://www.exploit-db.com/exploits/22426","maturity":"poc","reliabilityScore":0.8,"verified":true,"type":"dos","platforms":["php"],"requiresAuth":null,"exploitdb":{"verified":true,"type":"dos","platform":"php","file":"exploits/php/dos/22426.php","codes":["CVE-2003-0166","OSVDB-13395"]},"metasploit":null}],"exploitCount":5,"weaknesses":[],"affected":[{"vendor":"php","product":"php","name":"PHP","label":"php","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"4.0","noFixRecorded":false,"fixedIn":null},{"text":"4.0.1","noFixRecorded":false,"fixedIn":null},{"text":"4.0.2","noFixRecorded":false,"fixedIn":null},{"text":"4.0.3","noFixRecorded":false,"fixedIn":null},{"text":"4.0.4","noFixRecorded":false,"fixedIn":null},{"text":"4.0.5","noFixRecorded":false,"fixedIn":null},{"text":"4.0.6","noFixRecorded":false,"fixedIn":null},{"text":"4.0.7","noFixRecorded":false,"fixedIn":null},{"text":"4.1.0","noFixRecorded":false,"fixedIn":null},{"text":"4.1.1","noFixRecorded":false,"fixedIn":null},{"text":"4.1.2","noFixRecorded":false,"fixedIn":null},{"text":"4.2.0","noFixRecorded":false,"fixedIn":null},{"text":"4.2.1","noFixRecorded":false,"fixedIn":null},{"text":"4.2.2","noFixRecorded":false,"fixedIn":null},{"text":"4.2.3","noFixRecorded":false,"fixedIn":null},{"text":"4.3.0","noFixRecorded":false,"fixedIn":null},{"text":"4.3.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"4.0 | 4.0.1 | 4.0.2 | 4.0.3 | 4.0.4 | 4.0.5 | 4.0.6 | 4.0.7 | 4.1.0 | 4.1.1 | 4.1.2 | 4.2.0 | 4.2.1 | 4.2.2 | 4.2.3 | 4.3.0 | 4.3.1","eol":{"isEol":null,"eolDate":null,"matchMethod":"cpe","cycle":null,"product":{"name":"php","label":"PHP","category":"lang"}},"hubHref":"/vendor/php/php"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"http://marc.info/?l=bugtraq&m=104931415307111&w=2","label":"marc.info?l=bugtraq&m=104931415307111&w=2","hostname":"marc.info","tags":["Mailing List","X Refsource BUGTRAQ"]},{"url":"http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000691","label":"distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000691","hostname":"distro.conectiva.com.br","tags":["Vendor Advisory","X Refsource CONECTIVA"]},{"url":"http://marc.info/?l=bugtraq&m=104878100719467&w=2","label":"marc.info?l=bugtraq&m=104878100719467&w=2","hostname":"marc.info","tags":["Mailing List","X Refsource BUGTRAQ"]},{"url":"http://www.securityfocus.com/bid/7198","label":"www.securityfocus.com/bid/7198","hostname":"www.securityfocus.com","tags":["VDB Entry","X Refsource BID","Exploit","Vendor Advisory"]},{"url":"http://marc.info/?l=bugtraq&m=104869828526885&w=2","label":"marc.info?l=bugtraq&m=104869828526885&w=2","hostname":"marc.info","tags":["Mailing List","X Refsource BUGTRAQ"]},{"url":"http://www.securityfocus.com/bid/7197","label":"www.securityfocus.com/bid/7197","hostname":"www.securityfocus.com","tags":["VDB Entry","X Refsource BID","Exploit","Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2003-03-27T05:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-08T01:43:36.054Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":43,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T23:30:43.170Z","stale":false,"partial":false}}