{"api_version":"1","generated_at":"2026-07-23T10:07:38+00:00","cve":"CVE-2006-1991","urls":{"html":"https://cve.report/CVE-2006-1991","api":"https://cve.report/api/cve/CVE-2006-1991.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2006-1991","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2006-1991"},"summary":{"title":"CVE-2006-1991","description":"The substr_compare function in string.c in PHP 5.1.2 allows context-dependent attackers to cause a denial of service (memory access violation) via an out-of-bounds offset argument.","state":"PUBLISHED","assigner":"redhat","published_at":"2006-04-24 23:02:00","updated_at":"2025-04-03 01:03:51"},"problem_types":["CWE-399","n/a"],"metrics":[{"version":"2.0","source":"nvd@nist.gov","type":"Primary","score":"6.4","severity":"","vector":"AV:N/AC:L/Au:N/C:N/I:P/A:P","data":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:N/I:P/A:P","baseScore":6.4,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL"}}],"references":[{"url":"http://www.vupen.com/english/advisories/2006/1500","name":"http://www.vupen.com/english/advisories/2006/1500","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"],"title":"Webmail : Solution de messagerie professionnelle - OVHcloud- OVH","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.mandriva.com/security/advisories?name=MDKSA-2006:091","name":"http://www.mandriva.com/security/advisories?name=MDKSA-2006:091","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"Advisories - Mandriva Linux","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.ubuntu.com/usn/usn-320-1","name":"http://www.ubuntu.com/usn/usn-320-1","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"usn/usn-320-1 - Ubuntu: Linux for human beings","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://secunia.com/advisories/20269","name":"http://secunia.com/advisories/20269","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Vendor Advisory"],"title":"Mandriva update for php - Advisories - Secunia","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://secunia.com/advisories/20052","name":"http://secunia.com/advisories/20052","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"],"title":"Secunia - Advisories - Gentoo update for php","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/26003","name":"https://exchange.xforce.ibmcloud.com/vulnerabilities/26003","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"IBM X-Force Exchange","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.novell.com/linux/security/advisories/2006_31_php.html","name":"http://www.novell.com/linux/security/advisories/2006_31_php.html","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"Security Announcement","mime":"text/html","httpstatus":"404","archivestatus":"200"},{"url":"http://secunia.com/advisories/21125","name":"http://secunia.com/advisories/21125","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"],"title":"Ubuntu update for PHP - Advisories - Secunia","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://security.gentoo.org/glsa/glsa-200605-08.xml","name":"http://security.gentoo.org/glsa/glsa-200605-08.xml","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"Gentoo Linux Documentation\n--\n  PHP: Multiple vulnerabilities","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://secunia.com/advisories/20676","name":"http://secunia.com/advisories/20676","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"],"title":"Secunia - Advisories - SUSE update for php4 / php5","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://securitytracker.com/id?1015979","name":"http://securitytracker.com/id?1015979","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"SecurityTracker.com Archives - PHP wordwrap(), array_fill(), and substr_compare() Bugs Let Remote Users Deny Service or Execute Arbitrary Code","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.infigo.hr/en/in_focus/advisories/INFIGO-2006-04-02","name":"http://www.infigo.hr/en/in_focus/advisories/INFIGO-2006-04-02","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Exploit"],"title":"INFIGO IS Security Advisory #INFIGO-2006-04-02 | Infigo","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2006-1991","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2006-1991","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"n/a","product":"n/a","version":"affected n/a","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2006","cve_id":"1991","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"php","cpe5":"php","cpe6":"5.1.2","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2006","cve_id":"1991","cve":"CVE-2006-1991","epss":"0.036470000","percentile":"0.878740000","score_date":"2026-04-20","updated_at":"2026-04-21 00:07:48"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"providerMetadata":{"dateUpdated":"2024-08-07T17:35:31.394Z","orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE"},"references":[{"name":"1015979","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred"],"url":"http://securitytracker.com/id?1015979"},{"name":"php-substrcompare-length-dos(26003)","tags":["vdb-entry","x_refsource_XF","x_transferred"],"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/26003"},{"name":"SUSE-SA:2006:031","tags":["vendor-advisory","x_refsource_SUSE","x_transferred"],"url":"http://www.novell.com/linux/security/advisories/2006_31_php.html"},{"name":"MDKSA-2006:091","tags":["vendor-advisory","x_refsource_MANDRAKE","x_transferred"],"url":"http://www.mandriva.com/security/advisories?name=MDKSA-2006:091"},{"name":"GLSA-200605-08","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred"],"url":"http://security.gentoo.org/glsa/glsa-200605-08.xml"},{"name":"20269","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred"],"url":"http://secunia.com/advisories/20269"},{"name":"20676","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred"],"url":"http://secunia.com/advisories/20676"},{"name":"USN-320-1","tags":["vendor-advisory","x_refsource_UBUNTU","x_transferred"],"url":"http://www.ubuntu.com/usn/usn-320-1"},{"name":"21125","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred"],"url":"http://secunia.com/advisories/21125"},{"tags":["x_refsource_MISC","x_transferred"],"url":"http://www.infigo.hr/en/in_focus/advisories/INFIGO-2006-04-02"},{"name":"ADV-2006-1500","tags":["vdb-entry","x_refsource_VUPEN","x_transferred"],"url":"http://www.vupen.com/english/advisories/2006/1500"},{"name":"20052","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred"],"url":"http://secunia.com/advisories/20052"}],"title":"CVE Program Container"}],"cna":{"affected":[{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}],"datePublic":"2006-04-24T00:00:00.000Z","descriptions":[{"lang":"en","value":"The substr_compare function in string.c in PHP 5.1.2 allows context-dependent attackers to cause a denial of service (memory access violation) via an out-of-bounds offset argument."}],"problemTypes":[{"descriptions":[{"description":"n/a","lang":"en","type":"text"}]}],"providerMetadata":{"dateUpdated":"2017-07-19T15:57:01.000Z","orgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","shortName":"redhat"},"references":[{"name":"1015979","tags":["vdb-entry","x_refsource_SECTRACK"],"url":"http://securitytracker.com/id?1015979"},{"name":"php-substrcompare-length-dos(26003)","tags":["vdb-entry","x_refsource_XF"],"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/26003"},{"name":"SUSE-SA:2006:031","tags":["vendor-advisory","x_refsource_SUSE"],"url":"http://www.novell.com/linux/security/advisories/2006_31_php.html"},{"name":"MDKSA-2006:091","tags":["vendor-advisory","x_refsource_MANDRAKE"],"url":"http://www.mandriva.com/security/advisories?name=MDKSA-2006:091"},{"name":"GLSA-200605-08","tags":["vendor-advisory","x_refsource_GENTOO"],"url":"http://security.gentoo.org/glsa/glsa-200605-08.xml"},{"name":"20269","tags":["third-party-advisory","x_refsource_SECUNIA"],"url":"http://secunia.com/advisories/20269"},{"name":"20676","tags":["third-party-advisory","x_refsource_SECUNIA"],"url":"http://secunia.com/advisories/20676"},{"name":"USN-320-1","tags":["vendor-advisory","x_refsource_UBUNTU"],"url":"http://www.ubuntu.com/usn/usn-320-1"},{"name":"21125","tags":["third-party-advisory","x_refsource_SECUNIA"],"url":"http://secunia.com/advisories/21125"},{"tags":["x_refsource_MISC"],"url":"http://www.infigo.hr/en/in_focus/advisories/INFIGO-2006-04-02"},{"name":"ADV-2006-1500","tags":["vdb-entry","x_refsource_VUPEN"],"url":"http://www.vupen.com/english/advisories/2006/1500"},{"name":"20052","tags":["third-party-advisory","x_refsource_SECUNIA"],"url":"http://secunia.com/advisories/20052"}],"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"secalert@redhat.com","ID":"CVE-2006-1991","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"The substr_compare function in string.c in PHP 5.1.2 allows context-dependent attackers to cause a denial of service (memory access violation) via an out-of-bounds offset argument."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"name":"1015979","refsource":"SECTRACK","url":"http://securitytracker.com/id?1015979"},{"name":"php-substrcompare-length-dos(26003)","refsource":"XF","url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/26003"},{"name":"SUSE-SA:2006:031","refsource":"SUSE","url":"http://www.novell.com/linux/security/advisories/2006_31_php.html"},{"name":"MDKSA-2006:091","refsource":"MANDRAKE","url":"http://www.mandriva.com/security/advisories?name=MDKSA-2006:091"},{"name":"GLSA-200605-08","refsource":"GENTOO","url":"http://security.gentoo.org/glsa/glsa-200605-08.xml"},{"name":"20269","refsource":"SECUNIA","url":"http://secunia.com/advisories/20269"},{"name":"20676","refsource":"SECUNIA","url":"http://secunia.com/advisories/20676"},{"name":"USN-320-1","refsource":"UBUNTU","url":"http://www.ubuntu.com/usn/usn-320-1"},{"name":"21125","refsource":"SECUNIA","url":"http://secunia.com/advisories/21125"},{"name":"http://www.infigo.hr/en/in_focus/advisories/INFIGO-2006-04-02","refsource":"MISC","url":"http://www.infigo.hr/en/in_focus/advisories/INFIGO-2006-04-02"},{"name":"ADV-2006-1500","refsource":"VUPEN","url":"http://www.vupen.com/english/advisories/2006/1500"},{"name":"20052","refsource":"SECUNIA","url":"http://secunia.com/advisories/20052"}]}}}},"cveMetadata":{"assignerOrgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","assignerShortName":"redhat","cveId":"CVE-2006-1991","datePublished":"2006-04-24T23:00:00.000Z","dateReserved":"2006-04-24T00:00:00.000Z","dateUpdated":"2024-08-07T17:35:31.394Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.1"},"nvd":{"publishedDate":"2006-04-24 23:02:00","lastModifiedDate":"2025-04-03 01:03:51","problem_types":["CWE-399","n/a"],"metrics":{"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:N/I:P/A:P","baseScore":6.4,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL"},"baseSeverity":"MEDIUM","exploitabilityScore":10,"impactScore":4.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:php:php:5.1.2:*:*:*:*:*:*:*","matchCriteriaId":"11E5715F-A8BC-49EF-836B-BB78E1BC0790"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2006","CveId":"1991","Ordinal":"1","Title":"CVE-2006-1991","CVE":"CVE-2006-1991","Year":"2006"},"notes":[{"CveYear":"2006","CveId":"1991","Ordinal":"1","NoteData":"The substr_compare function in string.c in PHP 5.1.2 allows context-dependent attackers to cause a denial of service (memory access violation) via an out-of-bounds offset argument.","Type":"Description","Title":"CVE-2006-1991"},{"CveYear":"2006","CveId":"1991","Ordinal":"2","NoteData":"2006-04-24","Type":"Other","Title":"Published"},{"CveYear":"2006","CveId":"1991","Ordinal":"3","NoteData":"2017-07-19","Type":"Other","Title":"Modified"}]}}}