{"api_version":"1","generated_at":"2026-07-23T04:28:42+00:00","cve":"CVE-2017-7761","urls":{"html":"https://cve.report/CVE-2017-7761","api":"https://cve.report/api/cve/CVE-2017-7761.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2017-7761","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2017-7761"},"summary":{"title":"CVE-2017-7761","description":"The Mozilla Maintenance Service \"helper.exe\" application creates a temporary directory writable by non-privileged users. When this is combined with creation of a junction (a form of symbolic link), protected files in the target directory of the junction can be deleted by the Mozilla Maintenance Service, which has privileged access. Note: This attack requires local system access and only affects Windows. Other operating systems are not affected. This vulnerability affects Firefox ESR < 52.2 and Firefox < 54.","state":"PUBLIC","assigner":"security@mozilla.org","published_at":"2018-06-11 21:29:00","updated_at":"2019-10-03 00:03:00"},"problem_types":["CWE-276"],"metrics":[],"references":[{"url":"http://www.securitytracker.com/id/1038689","name":"1038689","refsource":"SECTRACK","tags":["Third Party Advisory","VDB Entry"],"title":"Mozilla Firefox Multiple Bugs Let Remote Users Spoof URLs, Obtain Potentially Sensitive Information, and Execute Arbitrary Code and Let Local Users Gain Elevated Privileges - SecurityTracker","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.securityfocus.com/bid/99057","name":"99057","refsource":"BID","tags":["Third Party Advisory","VDB Entry"],"title":"Mozilla Firefox Multiple Security Vulnerabilities","mime":"text/html","httpstatus":"200","archivestatus":"0"},{"url":"https://www.mozilla.org/security/advisories/mfsa2017-16/","name":"https://www.mozilla.org/security/advisories/mfsa2017-16/","refsource":"CONFIRM","tags":["Vendor Advisory"],"title":"Security vulnerabilities fixed in Firefox ESR 52.2 — Mozilla","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1215648","name":"https://bugzilla.mozilla.org/show_bug.cgi?id=1215648","refsource":"CONFIRM","tags":["Issue Tracking","Vendor Advisory"],"title":"1215648 - (CVE-2017-7761) Maintenance Service helper.exe File Deletion Elevation of Privilege","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.mozilla.org/security/advisories/mfsa2017-15/","name":"https://www.mozilla.org/security/advisories/mfsa2017-15/","refsource":"CONFIRM","tags":["Vendor Advisory"],"title":"Security vulnerabilities fixed in Firefox 54 — Mozilla","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://sourceforge.net/p/nsis/bugs/1125/","name":"https://sourceforge.net/p/nsis/bugs/1125/","refsource":"MISC","tags":["Issue Tracking","Third Party Advisory"],"title":"NSIS: Nullsoft Scriptable Install System / Bugs / #1125 Code execution / Privilege escalation problems with NSIS installers","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2017-7761","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-7761","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2017","cve_id":"7761","vulnerable":"-1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"microsoft","cpe5":"windows","cpe6":"-","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2017","cve_id":"7761","vulnerable":"0","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"microsoft","cpe5":"windows","cpe6":"-","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2017","cve_id":"7761","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"mozilla","cpe5":"firefox","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2017","cve_id":"7761","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"mozilla","cpe5":"firefox","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2017","cve_id":"7761","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"mozilla","cpe5":"firefox_esr","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2017","cve_id":"7761","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"mozilla","cpe5":"firefox_esr","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"security@mozilla.org","ID":"CVE-2017-7761","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Firefox ESR","version":{"version_data":[{"version_affected":"<","version_value":"52.2"}]}},{"product_name":"Firefox","version":{"version_data":[{"version_affected":"<","version_value":"54"}]}}]},"vendor_name":"Mozilla"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"The Mozilla Maintenance Service \"helper.exe\" application creates a temporary directory writable by non-privileged users. When this is combined with creation of a junction (a form of symbolic link), protected files in the target directory of the junction can be deleted by the Mozilla Maintenance Service, which has privileged access. Note: This attack requires local system access and only affects Windows. Other operating systems are not affected. This vulnerability affects Firefox ESR < 52.2 and Firefox < 54."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"File deletion and privilege escalation through Mozilla Maintenance Service helper.exe application"}]}]},"references":{"reference_data":[{"name":"99057","refsource":"BID","url":"http://www.securityfocus.com/bid/99057"},{"name":"https://bugzilla.mozilla.org/show_bug.cgi?id=1215648","refsource":"CONFIRM","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1215648"},{"name":"https://www.mozilla.org/security/advisories/mfsa2017-15/","refsource":"CONFIRM","url":"https://www.mozilla.org/security/advisories/mfsa2017-15/"},{"name":"1038689","refsource":"SECTRACK","url":"http://www.securitytracker.com/id/1038689"},{"name":"https://sourceforge.net/p/nsis/bugs/1125/","refsource":"MISC","url":"https://sourceforge.net/p/nsis/bugs/1125/"},{"name":"https://www.mozilla.org/security/advisories/mfsa2017-16/","refsource":"CONFIRM","url":"https://www.mozilla.org/security/advisories/mfsa2017-16/"}]}},"nvd":{"publishedDate":"2018-06-11 21:29:00","lastModifiedDate":"2019-10-03 00:03:00","problem_types":["CWE-276"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.0","vectorString":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"NONE","baseScore":5.5,"baseSeverity":"MEDIUM"},"exploitabilityScore":1.8,"impactScore":3.6},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:L/AC:L/Au:N/C:N/I:P/A:P","accessVector":"LOCAL","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL","baseScore":3.6},"severity":"LOW","exploitabilityScore":3.9,"impactScore":4.9,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"AND","children":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*","versionEndExcluding":"54.0","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*","versionEndExcluding":"52.2.0","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":false,"cpe23Uri":"cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*","cpe_name":[]}]}],"cpe_match":[]}]}},"legacy_mitre":{"record":{"CveYear":"2017","CveId":"7761","Ordinal":"104575","Title":"CVE-2017-7761","CVE":"CVE-2017-7761","Year":"2017"},"notes":[{"CveYear":"2017","CveId":"7761","Ordinal":"1","NoteData":"The Mozilla Maintenance Service \"helper.exe\" application creates a temporary directory writable by non-privileged users. When this is combined with creation of a junction (a form of symbolic link), protected files in the target directory of the junction can be deleted by the Mozilla Maintenance Service, which has privileged access. Note: This attack requires local system access and only affects Windows. Other operating systems are not affected. This vulnerability affects Firefox ESR < 52.2 and Firefox < 54.","Type":"Description","Title":null},{"CveYear":"2017","CveId":"7761","Ordinal":"2","NoteData":"2018-06-11","Type":"Other","Title":"Published"},{"CveYear":"2017","CveId":"7761","Ordinal":"3","NoteData":"2018-06-12","Type":"Other","Title":"Modified"}]}}}