{"api_version":"1","generated_at":"2026-04-23T10:40:12+00:00","cve":"CVE-2016-4975","urls":{"html":"https://cve.report/CVE-2016-4975","api":"https://cve.report/api/cve/CVE-2016-4975.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2016-4975","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2016-4975"},"summary":{"title":"CVE-2016-4975","description":"Possible CRLF injection allowing HTTP response splitting attacks for sites which use mod_userdir. This issue was mitigated by changes made in 2.4.25 and 2.2.32 which prohibit CR or LF injection into the \"Location\" or other outbound header key or value. Fixed in Apache HTTP Server 2.4.25 (Affected 2.4.1-2.4.23). Fixed in Apache HTTP Server 2.2.32 (Affected 2.2.0-2.2.31).","state":"PUBLIC","assigner":"security@apache.org","published_at":"2018-08-14 12:29:00","updated_at":"2023-11-07 02:32:00"},"problem_types":["CWE-93"],"metrics":[],"references":[{"url":"https://lists.apache.org/thread.html/rd336919f655b7ff309385e34a143e41c503e133da80414485b3abcc9%40%3Ccvs.httpd.apache.org%3E","name":"[httpd-cvs] 20210603 svn commit: r1075360 [3/3] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE-2021-31618.json security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html","refsource":"","tags":[],"title":"Pony Mail!","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.apache.org/thread.html/r04e89e873d54116a0635ef2f7061c15acc5ed27ef7500997beb65d6f%40%3Ccvs.httpd.apache.org%3E","name":"[httpd-cvs] 20210330 svn commit: r1073139 [10/13] - in /websites/staging/httpd/trunk/content: ./ 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record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-4975","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[{"source":"LEGACY","value":"The issue was discovered by Sergey 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Linux Security Update for mod_proxy_html (VZLSA-2017:0906)"},{"cve":"CVE-2016-4975","qid":"730846","title":"Apache HTTP Server CRLF Injection Vulnerability (CVE-2016-4975)"}]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"security@apache.org","DATE_PUBLIC":"2018-08-14","ID":"CVE-2016-4975","STATE":"PUBLIC","TITLE":"mod_userdir CRLF injection"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Apache HTTP Server","version":{"version_data":[{"version_value":"Fixed in Apache HTTP Server 2.4.25 (Affected 2.4.1-2.4.23)"},{"version_value":"Fixed in Apache HTTP Server 2.2.32 (Affected 2.2.0-2.2.31)"}]}}]},"vendor_name":"Apache Software Foundation"}]}},"credit":[{"lang":"eng","value":"The issue was discovered by Sergey Bobrov"}],"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"Possible CRLF injection allowing HTTP response splitting attacks for sites which use mod_userdir. This issue was mitigated by changes made in 2.4.25 and 2.2.32 which prohibit CR or LF injection into the \"Location\" or other outbound header key or value. Fixed in Apache HTTP Server 2.4.25 (Affected 2.4.1-2.4.23). Fixed in Apache HTTP Server 2.2.32 (Affected 2.2.0-2.2.31)."}]},"impact":[{"lang":"eng","url":"https://httpd.apache.org/security/impact_levels.html#moderate","value":"moderate"}],"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"(undefined)"}]}]},"references":{"reference_data":[{"name":"https://httpd.apache.org/security/vulnerabilities_22.html#CVE-2016-4975","refsource":"CONFIRM","url":"https://httpd.apache.org/security/vulnerabilities_22.html#CVE-2016-4975"},{"name":"https://security.netapp.com/advisory/ntap-20180926-0006/","refsource":"CONFIRM","url":"https://security.netapp.com/advisory/ntap-20180926-0006/"},{"name":"https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03908en_us","refsource":"CONFIRM","url":"https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03908en_us"},{"name":"105093","refsource":"BID","url":"http://www.securityfocus.com/bid/105093"},{"name":"https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2016-4975","refsource":"CONFIRM","url":"https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2016-4975"},{"refsource":"MLIST","name":"[httpd-cvs] 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"CveId":"4975","Ordinal":"90919","Title":"CVE-2016-4975","CVE":"CVE-2016-4975","Year":"2016"},"notes":[{"CveYear":"2016","CveId":"4975","Ordinal":"1","NoteData":"Possible CRLF injection allowing HTTP response splitting attacks for sites which use mod_userdir. This issue was mitigated by changes made in 2.4.25 and 2.2.32 which prohibit CR or LF injection into the \"Location\" or other outbound header key or value. Fixed in Apache HTTP Server 2.4.25 (Affected 2.4.1-2.4.23). Fixed in Apache HTTP Server 2.2.32 (Affected 2.2.0-2.2.31).","Type":"Description","Title":null},{"CveYear":"2016","CveId":"4975","Ordinal":"2","NoteData":"2018-08-14","Type":"Other","Title":"Published"},{"CveYear":"2016","CveId":"4975","Ordinal":"3","NoteData":"2021-06-06","Type":"Other","Title":"Modified"}]}}}