{"api_version":"1","generated_at":"2026-04-23T02:34:29+00:00","cve":"CVE-2017-8923","urls":{"html":"https://cve.report/CVE-2017-8923","api":"https://cve.report/api/cve/CVE-2017-8923.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2017-8923","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2017-8923"},"summary":{"title":"CVE-2017-8923","description":"The zend_string_extend function in Zend/zend_string.h in PHP through 7.1.5 does not prevent changes to string objects that result in a negative length, which allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact by leveraging a script's use of .= with a long string.","state":"PUBLIC","assigner":"cve@mitre.org","published_at":"2017-05-12 20:29:00","updated_at":"2022-07-20 16:32:00"},"problem_types":["CWE-787"],"metrics":[],"references":[{"url":"http://www.securityfocus.com/bid/98518","name":"98518","refsource":"BID","tags":["Third Party Advisory","VDB Entry"],"title":"PHP 'zend_string_extend()' Function Denial of Service Vulnerability","mime":"text/html","httpstatus":"200","archivestatus":"0"},{"url":"https://bugs.php.net/bug.php?id=74577","name":"https://bugs.php.net/bug.php?id=74577","refsource":"MISC","tags":["Exploit","Issue Tracking","Vendor Advisory"],"title":"PHP :: Bug #74577 :: Memory corruption in zend_string_extend","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2017-8923","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-8923","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2017","cve_id":"8923","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"php","cpe5":"php","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2017","cve_id":"8923","vulnerable":"1","versionEndIncluding":"7.1.5","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"php","cpe5":"php","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2017-8923","qid":"198686","title":"Ubuntu Security Notification for Hypertext Preprocessor (PHP) Vulnerabilities (USN-5300-2)"},{"cve":"CVE-2017-8923","qid":"198690","title":"Ubuntu Security Notification for Hypertext Preprocessor (PHP) Vulnerabilities (USN-5300-3)"},{"cve":"CVE-2017-8923","qid":"672181","title":"EulerOS Security Update for Hypertext Preprocessor (PHP) (EulerOS-SA-2022-2477)"},{"cve":"CVE-2017-8923","qid":"751733","title":"SUSE Enterprise Linux Security Update for php74 (SUSE-SU-2022:0530-1)"},{"cve":"CVE-2017-8923","qid":"751763","title":"SUSE Enterprise Linux Security Update for php72 (SUSE-SU-2022:0577-1)"},{"cve":"CVE-2017-8923","qid":"751772","title":"SUSE Enterprise Linux Security Update for php7 (SUSE-SU-2022:0679-1)"},{"cve":"CVE-2017-8923","qid":"751779","title":"OpenSUSE Security Update for php7 (openSUSE-SU-2022:0679-1)"},{"cve":"CVE-2017-8923","qid":"751825","title":"OpenSUSE Security Update for php7 (openSUSE-SU-2022:0699-1)"},{"cve":"CVE-2017-8923","qid":"751826","title":"OpenSUSE Security Update for nodejs8 (openSUSE-SU-22022:20000-2)"},{"cve":"CVE-2017-8923","qid":"751828","title":"OpenSUSE Security Update for php7 (openSUSE-SU-22022:20000-2)"},{"cve":"CVE-2017-8923","qid":"752878","title":"SUSE Enterprise Linux Security Update for php7 (SUSE-SU-2022:4067-1)"},{"cve":"CVE-2017-8923","qid":"752898","title":"SUSE Enterprise Linux Security Update for php7 (SUSE-SU-2022:4069-1)"},{"cve":"CVE-2017-8923","qid":"752901","title":"SUSE Enterprise Linux Security Update for php74 (SUSE-SU-2022:4068-1)"},{"cve":"CVE-2017-8923","qid":"753413","title":"SUSE Enterprise Linux Security Update for php7 (SUSE-SU-2022:0699-1)"},{"cve":"CVE-2017-8923","qid":"902524","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for Hypertext Preprocessor (PHP) (10142)"}]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2017-8923","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 zend_string_extend function in Zend/zend_string.h in PHP through 7.1.5 does not prevent changes to string objects that result in a negative length, which allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact by leveraging a script's use of .= with a long string."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"name":"98518","refsource":"BID","url":"http://www.securityfocus.com/bid/98518"},{"name":"https://bugs.php.net/bug.php?id=74577","refsource":"MISC","url":"https://bugs.php.net/bug.php?id=74577"}]}},"nvd":{"publishedDate":"2017-05-12 20:29:00","lastModifiedDate":"2022-07-20 16:32:00","problem_types":["CWE-787"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL"},"exploitabilityScore":3.9,"impactScore":5.9},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P","accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL","baseScore":7.5},"severity":"HIGH","exploitabilityScore":10,"impactScore":6.4,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:php:php:*:*:*:*:*:*:*:*","versionStartIncluding":"8.0.0","versionEndExcluding":"8.0.11","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:php:php:*:*:*:*:*:*:*:*","versionEndExcluding":"7.4.24","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2017","CveId":"8923","Ordinal":"105862","Title":"CVE-2017-8923","CVE":"CVE-2017-8923","Year":"2017"},"notes":[{"CveYear":"2017","CveId":"8923","Ordinal":"1","NoteData":"The zend_string_extend function in Zend/zend_string.h in PHP through 7.1.5 does not prevent changes to string objects that result in a negative length, which allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact by leveraging a script's use of .= with a long string.","Type":"Description","Title":null},{"CveYear":"2017","CveId":"8923","Ordinal":"2","NoteData":"2017-05-12","Type":"Other","Title":"Published"},{"CveYear":"2017","CveId":"8923","Ordinal":"3","NoteData":"2017-05-24","Type":"Other","Title":"Modified"}]}}}