{"id":"CVE-2021-22925","details":"curl supports the `-t` command line option, known as `CURLOPT_TELNETOPTIONS`in libcurl. This rarely used option is used to send variable=content pairs toTELNET servers.Due to flaw in the option parser for sending `NEW_ENV` variables, libcurlcould be made to pass on uninitialized data from a stack based buffer to theserver. Therefore potentially revealing sensitive internal information to theserver using a clear-text network protocol.This could happen because curl did not call and use sscanf() correctly whenparsing the string provided by the application.","aliases":["CURL-CVE-2021-22925"],"modified":"2026-04-15T23:59:15.012653618Z","published":"2021-08-05T21:15:11.467Z","related":["ALSA-2021:4511","SUSE-SU-2021:14768-1","SUSE-SU-2021:2425-1","SUSE-SU-2021:2439-1","SUSE-SU-2021:2440-1","SUSE-SU-2021:2462-1","openSUSE-SU-2021:1088-1","openSUSE-SU-2021:2439-1"],"database_specific":{"unresolved_ranges":[{"extracted_events":[{"last_affected":"8.57"}],"cpe":"cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.57:*:*:*:*:*:*:*","source":"CPE_FIELD"},{"extracted_events":[{"last_affected":"8.58"}],"cpe":"cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.58:*:*:*:*:*:*:*","source":"CPE_FIELD"},{"extracted_events":[{"last_affected":"8.59"}],"cpe":"cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.59:*:*:*:*:*:*:*","source":"CPE_FIELD"},{"extracted_events":[{"fixed":"1.0.1.1"}],"cpe":"cpe:2.3:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:*","source":"CPE_FIELD"},{"extracted_events":[{"fixed":"3.1"}],"cpe":"cpe:2.3:a:siemens:sinema_remote_connect_server:*:*:*:*:*:*:*:*","source":"CPE_FIELD"},{"extracted_events":[{"introduced":"8.2.0"},{"fixed":"8.2.12"},{"introduced":"9.0.0"},{"fixed":"9.0.6"}],"cpe":"cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:*","source":"CPE_FIELD"},{"extracted_events":[{"last_affected":"10.15.7-NA"}],"cpe":"cpe:2.3:o:apple:mac_os_x:10.15.7:-:*:*:*:*:*:*","source":"CPE_FIELD"},{"extracted_events":[{"last_affected":"10.15.7-security_update_2021\\-001"}],"cpe":"cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-001:*:*:*:*:*:*","source":"CPE_FIELD"},{"extracted_events":[{"last_affected":"10.15.7-security_update_2021\\-002"}],"cpe":"cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-002:*:*:*:*:*:*","source":"CPE_FIELD"},{"extracted_events":[{"last_affected":"10.15.7-security_update_2021\\-003"}],"cpe":"cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-003:*:*:*:*:*:*","source":"CPE_FIELD"},{"extracted_events":[{"last_affected":"10.15.7-security_update_2021\\-004"}],"cpe":"cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-004:*:*:*:*:*:*","source":"CPE_FIELD"},{"extracted_events":[{"last_affected":"11.0.1"}],"cpe":"cpe:2.3:o:apple:macos:11.0.1:*:*:*:*:*:*:*","source":"CPE_FIELD"},{"extracted_events":[{"last_affected":"11.0"}],"cpe":"cpe:2.3:o:apple:macos:11.0:*:*:*:*:*:*:*","source":"CPE_FIELD"},{"extracted_events":[{"last_affected":"11.1.0"}],"cpe":"cpe:2.3:o:apple:macos:11.1.0:*:*:*:*:*:*:*","source":"CPE_FIELD"},{"extracted_events":[{"last_affected":"11.1"}],"cpe":"cpe:2.3:o:apple:macos:11.1:*:*:*:*:*:*:*","source":"CPE_FIELD"},{"extracted_events":[{"last_affected":"11.2.1"}],"cpe":"cpe:2.3:o:apple:macos:11.2.1:*:*:*:*:*:*:*","source":"CPE_FIELD"},{"extracted_events":[{"last_affected":"11.2"}],"cpe":"cpe:2.3:o:apple:macos:11.2:*:*:*:*:*:*:*","source":"CPE_FIELD"},{"extracted_events":[{"last_affected":"11.3.1"}],"cpe":"cpe:2.3:o:apple:macos:11.3.1:*:*:*:*:*:*:*","source":"CPE_FIELD"},{"extracted_events":[{"last_affected":"11.3"}],"cpe":"cpe:2.3:o:apple:macos:11.3:*:*:*:*:*:*:*","source":"CPE_FIELD"},{"extracted_events":[{"last_affected":"11.4"}],"cpe":"cpe:2.3:o:apple:macos:11.4:*:*:*:*:*:*:*","source":"CPE_FIELD"},{"extracted_events":[{"last_affected":"11.5"}],"cpe":"cpe:2.3:o:apple:macos:11.5:*:*:*:*:*:*:*","source":"CPE_FIELD"},{"extracted_events":[{"last_affected":"33"}],"cpe":"cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*","source":"CPE_FIELD"}]},"references":[{"type":"ADVISORY","url":"http://seclists.org/fulldisclosure/2021/Sep/39"},{"type":"ADVISORY","url":"http://seclists.org/fulldisclosure/2021/Sep/40"},{"type":"ADVISORY","url":"https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FRUCW2UVNYUDZF72DQLFQR4PJEC6CF7V/"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202212-01"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20210902-0003/"},{"type":"ADVISORY","url":"https://support.apple.com/kb/HT212804"},{"type":"ADVISORY","url":"https://support.apple.com/kb/HT212805"},{"type":"FIX","url":"https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"},{"type":"FIX","url":"https://hackerone.com/reports/1223882"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpujan2022.html"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpuoct2021.html"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/curl/curl","events":[{"introduced":"546572da0457f37c698c02d0a08d90fdfcbeedec"},{"fixed":"bfbde883af33397943df68a3ae01847a634d33bf"}],"database_specific":{"extracted_events":[{"introduced":"7.7"},{"fixed":"7.78.0"}],"cpe":"cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*","source":"CPE_FIELD"}}],"versions":["before_ftp_statemachine","before_urldata_rename","curl-7_10","curl-7_10_1","curl-7_10_2","curl-7_10_3","curl-7_10_4","curl-7_10_5","curl-7_10_6","curl-7_10_7","curl-7_10_8","curl-7_11_0","curl-7_11_1","curl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