{"schema_version":"1.7.5","id":"CVE-2021-22925","published":"2021-08-05T21:15:11.467Z","modified":"2026-07-08T05:56:53.392290887Z","aliases":["CURL-CVE-2021-22925"],"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"],"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.","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/curl/curl","events":[{"introduced":"546572da0457f37c698c02d0a08d90fdfcbeedec"},{"fixed":"bfbde883af33397943df68a3ae01847a634d33bf"}],"database_specific":{"cpe":"cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"7.7"},{"fixed":"7.78.0"}],"source":"CPE_RANGE"}}],"versions":["curl-7_77_0","curl-7_76_1","curl-7_76_0","curl-7_75_0","curl-7_74_0","curl-7_73_0","curl-7_72_0","curl-7_71_1","curl-7_71_0","curl-7_70_0","curl-7_69_1","curl-7_69_0","curl-7_68_0","curl-7_67_0","curl-7_66_0","curl-7_65_3","curl-7_65_2","curl-7_65_1","curl-7_65_0","curl-7_64_1","curl-7_64_0","curl-7_63_0","curl-7_62_0","curl-7_61_1","curl-7_61_0","curl-7_60_0","curl-7_59_0","curl-7_58_0","curl-7_57_0","curl-7_56_1","curl-7_56_0","curl-7_55_1","curl-7_55_0","curl-7_54_1","curl-7_54_0","curl-7_53_1","curl-7_53_0","curl-7_52_1","curl-7_52_0","curl-7_51_0","curl-7_50_3","curl-7_50_2","curl-7_50_1","curl-7_50_0","curl-7_49_1","curl-7_49_0","curl-7_48_0","curl-7_47_1","curl-7_47_0","curl-7_46_0","curl-7_45_0","curl-7_44_0","curl-7_43_0","curl-7_42_0","curl-7_41_0","curl-7_40_0","curl-7_39_0","curl-7_38_0","curl-7_37_1","curl-7_37_0","curl-7_36_0","curl-7_35_0","curl-7_34_0","curl-7_33_0","curl-7_32_0","curl-7_31_0","curl-7_30_0","curl-7_29_0","curl-7_28_1","curl-7_28_0","curl-7_27_0","curl-7_26_0","curl-7_25_0","curl-7_23_1","curl-7_23_0","curl-7_22_0","curl-7_21_7","curl-7_21_6","curl-7_21_5","curl-7_21_4","curl-7_21_3","curl-7_21_2","curl-7_21_1","curl-7_21_0","curl-7_20_1","curl-7_20_0","curl-7_19_7","curl-7_19_6","curl-7_19_5","curl-7_19_4","curl-7_19_3","curl-7_19_2","curl-7_19_1","curl-7_19_0","curl-7_18_2","curl-7_18_1","curl-7_18_0","curl-7_17_1","curl-7_17_0","curl-7_17_0-preldapfix","curl-7_16_4","curl-7_16_3","curl-7_16_2","curl-7_16_1","curl-7_16_0","curl-7_15_6-prepipeline","curl-7_15_5","curl-7_15_4","curl-7_15_3","curl-7_15_2","curl-7_15_1","curl-7_15_0","curl-7_14_1","curl-7_14_0","curl-7_13_2","curl-7_13_1","before_ftp_statemachine","curl-7_13_0","curl-7_12_3","curl-7_12_2","curl-7_12_1","curl-7_12_0","curl-7_11_2","curl-7_11_1","curl-7_11_0","curl-7_10_8","curl-7_10_7","curl-7_10_6","curl-7_10_5","curl-7_10_4","curl-7_10_3","curl-7_10_2","curl-7_10_1","curl-7_10","curl-7_9_8","curl-7_9_7","curl-7_9_7-pre2","curl-7_9_6","curl-7_9_5","curl-7_9_5-pre4","curl-7_9_5-pre2","curl-7_9_4","curl-7_9_3","curl-7_9_3-pre3","curl-7_9_3-pre2","curl-7_9_3-pre1","curl-7_9_2","curl-7_9_1","curl-7_9","before_urldata_rename","curl-7_8_1","curl-7_8_1-pre3","curl-7_8","curl-7_8-pre2","curl-7_7_3","curl-7_7_2","curl-7_7_1","curl-7_7"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-22925.json"}},{"ranges":[{"type":"GIT","repo":"https://github.com/mysql/mysql-server","events":[{"introduced":"0"},{"last_affected":"89713bf41c33528c3e7682d219dc838915f5af9a"},{"introduced":"270fd3411e3d671a73ed9725940a30080f59ce6d"},{"last_affected":"beb865a960b9a8a16cf999c323e46c5b0c67f21f"}],"database_specific":{"cpe":"cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"5.7.0"},{"last_affected":"5.7.35"},{"introduced":"8.0.0"},{"last_affected":"8.0.26"}],"source":"CPE_RANGE"}}],"versions":["mysql-cluster-8.0.26","mysql-8.0.26","mysql-5.7.35","mysql-5.7.32","mysql-5.7.31","mysql-5.1.4","mysql-4.0.4","mysql-4.0.2","mysql-3.23.36","mysql-3.23.33","mysql-3.23.32","mysql-3.23.31","mysql-3.23.30-gamma","mysql-3.23.28-gamma","mysql-3.23.22-beta"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-22925.json"}}],"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"}],"database_specific":{"unresolved_ranges":[{"cpes":["cpe:2.3:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:*"],"extracted_events":[{"fixed":"1.0.1.1"}],"source":"CPE_RANGE","vendor_product":"siemens:sinec_infrastructure_network_services"},{"cpes":["cpe:2.3:a:siemens:sinema_remote_connect_server:*:*:*:*:*:*:*:*"],"extracted_events":[{"fixed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