{"id":"CVE-2021-22898","details":"curl 7.7 through 7.76.1 suffers from an information disclosure when the `-t` command line option, known as `CURLOPT_TELNETOPTIONS` in libcurl, is used to send variable=content pairs to TELNET servers. Due to a flaw in the option parser for sending NEW_ENV variables, libcurl could be made to pass on uninitialized data from a stack based buffer to the server, resulting in potentially revealing sensitive internal information to the server using a clear-text network protocol.","aliases":["CURL-CVE-2021-22898"],"modified":"2026-04-16T04:32:34.946732136Z","published":"2021-06-11T16:15:11.043Z","related":["ALSA-2021:4511","SUSE-SU-2021:14735-1","SUSE-SU-2021:14760-1","SUSE-SU-2021:1762-1","SUSE-SU-2021:1763-1","SUSE-SU-2021:1786-1","SUSE-SU-2021:1809-1","openSUSE-SU-2021:0808-1","openSUSE-SU-2021:1762-1","openSUSE-SU-2024:10582-1"],"references":[{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2022/08/msg00017.html"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/POOC3UV7V6L4CJ5KA2PTWTNUV5Y72T3Q/"},{"type":"ADVISORY","url":"https://lists.apache.org/thread.html/rc713534b10f9daeee2e0990239fa407e2118e4aa9e88a7041177497c%40%3Cissues.guacamole.apache.org%3E"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2021/08/msg00017.html"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FRUCW2UVNYUDZF72DQLFQR4PJEC6CF7V/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2022/dsa-5197"},{"type":"FIX","url":"https://curl.se/docs/CVE-2021-22898.html"},{"type":"FIX","url":"https://github.com/curl/curl/commit/39ce47f219b09c380b81f89fe54ac586c8db6bde"},{"type":"FIX","url":"https://hackerone.com/reports/1176461"},{"type":"FIX","url":"https://www.oracle.com//security-alerts/cpujul2021.html"},{"type":"FIX","url":"http://www.openwall.com/lists/oss-security/2021/07/21/4"},{"type":"FIX","url":"https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpuapr2022.html"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpujan2022.html"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/curl/curl","events":[{"introduced":"546572da0457f37c698c02d0a08d90fdfcbeedec"},{"last_affected":"566b74a0e19b9aa610f4931e5bfd339bcf8e9147"},{"fixed":"39ce47f219b09c380b81f89fe54ac586c8db6bde"}],"database_specific":{"versions":[{"introduced":"7.7"},{"last_affected":"7.76.1"}]}},{"type":"GIT","repo":"https://github.com/mysql/mysql-server","events":[{"introduced":"0"},{"last_affected":"527c12ed611f3fe072c3043734319edb2c733099"},{"introduced":"0"},{"fixed":"a9b0c712de3509d8d08d3ba385d41a4df6348775"},{"introduced":"ca94b993454c86be248fbe180db94647488114e9"},{"fixed":"98b2ccb470de120d36bc4a623c814cdfded958ec"},{"introduced":"0"},{"last_affected":"61a3a1d8ef15512396b4c2af46e922a19bf2b174"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"9.0"},{"introduced":"0"},{"fixed":"5.7.34"},{"introduced":"8.0.15"},{"fixed":"8.0.25"},{"introduced":"0"},{"last_affected":"9.1.0"}]}}],"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-7_11_2","curl-7_12_0","curl-7_12_1","curl-7_12_2","curl-7_12_3","curl-7_13_0","curl-7_13_1","curl-7_13_2","curl-7_14_0","curl-7_14_1","curl-7_15_0","curl-7_15_1","curl-7_15_2","curl-7_15_3","curl-7_15_4","curl-7_15_5","curl-7_15_6-prepipeline","curl-7_16_0","curl-7_16_1","curl-7_16_2","curl-7_16_3","curl-7_16_4","curl-7_17_0","curl-7_17_0-preldapfix","curl-7_17_1","curl-7_18_0","curl-7_18_1","curl-7_18_2","curl-7_19_0","curl-7_19_1","curl-7_19_2","curl-7_19_3","curl-7_19_4","curl-7_19_5","curl-7_19_6","curl-7_19_7","curl-7_20_0","curl-7_20_1","curl-7_21_0","curl-7_21_1","curl-7_21_2","curl-7_21_3","curl-7_21_4","curl-7_21_5","curl-7_21_6","curl-7_21_7","curl-7_22_0","curl-7_23_0","curl-7_23_1","curl-7_25_0","curl-7_26_0","curl-7_27_0","curl-7_28_0","curl-7_28_1","curl-7_29_0","curl-7_30_0","curl-7_31_0","curl-7_32_0","curl-7_33_0","curl-7_34_0","curl-7_35_0","curl-7_36_0","curl-7_37_0","curl-7_37_1","curl-7_38_0","curl-7_39_0","curl-7_40_0","curl-7_41_0","curl-7_42_0","curl-7_43_0","curl-7_44_0","curl-7_45_0","curl-7_46_0","curl-7_47_0","curl-7_47_1","curl-7_48_0","curl-7_49_0","curl-7_49_1","curl-7_50_0","curl-7_50_1","curl-7_50_2","curl-7_50_3","curl-7_51_0","curl-7_52_0","curl-7_52_1","curl-7_53_0","curl-7_53_1","curl-7_54_0","curl-7_54_1","curl-7_55_0","curl-7_55_1","curl-7_56_0","curl-7_56_1","curl-7_57_0","curl-7_58_0","curl-7_59_0","curl-7_60_0","curl-7_61_0","curl-7_61_1","curl-7_62_0","curl-7_63_0","curl-7_64_0","curl-7_64_1","curl-7_65_0","curl-7_65_1","curl-7_65_2","curl-7_65_3","curl-7_66_0","curl-7_67_0","curl-7_68_0","curl-7_69_0","curl-7_69_1","curl-7_7","curl-7_70_0","curl-7_71_0","curl-7_71_1","curl-7_72_0","curl-7_73_0","curl-7_74_0","curl-7_75_0","curl-7_76_0","curl-7_76_1","curl-7_7_1","curl-7_7_2","curl-7_7_3","curl-7_8","curl-7_8-pre2","curl-7_8_1","curl-7_8_1-pre3","curl-7_9","curl-7_9_1","curl-7_9_2","curl-7_9_3","curl-7_9_3-pre1","curl-7_9_3-pre2","curl-7_9_3-pre3","curl-7_9_4","curl-7_9_5","curl-7_9_5-pre2","curl-7_9_5-pre4","curl-7_9_6","curl-7_9_7","curl-7_9_7-pre2","curl-7_9_8","mysql-3.23.22-beta","my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