{"id":"CVE-2023-27535","details":"An authentication bypass vulnerability exists in libcurl \u003c8.0.0 in the FTP connection reuse feature that can result in wrong credentials being used during subsequent transfers. Previously created connections are kept in a connection pool for reuse if they match the current setup. However, certain FTP settings such as CURLOPT_FTP_ACCOUNT, CURLOPT_FTP_ALTERNATIVE_TO_USER, CURLOPT_FTP_SSL_CCC, and CURLOPT_USE_SSL were not included in the configuration match checks, causing them to match too easily. This could lead to libcurl using the wrong credentials when performing a transfer, potentially allowing unauthorized access to sensitive information.","aliases":["CURL-CVE-2023-27535"],"modified":"2026-04-16T04:34:13.993410932Z","published":"2023-03-30T20:15:07.483Z","related":["ALSA-2023:2650","ALSA-2023:3106","SUSE-SU-2023:0865-1","SUSE-SU-2023:1582-1","SUSE-SU-2023:1711-1","SUSE-SU-2023:2226-1","SUSE-SU-2023:2228-1","openSUSE-SU-2024:12812-1"],"references":[{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2023/04/msg00025.html"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36NBD5YLJXXEDZLDGNFCERWRYJQ6LAQW/"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202310-12"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20230420-0010/"},{"type":"EVIDENCE","url":"https://hackerone.com/reports/1892780"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/curl/curl","events":[{"introduced":"4a9e12542dba5d3ce4b6205f1ec58e1336bc4b0e"},{"last_affected":"046209e561b7e9b5aab1aef7daebf29ee6e6e8c7"}],"database_specific":{"versions":[{"introduced":"7.13.0"},{"last_affected":"7.88.1"}]}}],"versions":["before_ftp_statemachine","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_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_77_0","curl-7_78_0","curl-7_79_0","curl-7_79_1","curl-7_80_0","curl-7_81_0","curl-7_82_0","curl-7_83_0","curl-7_83_1","curl-7_84_0","curl-7_85_0","curl-7_86_0","curl-7_87_0","curl-7_88_0","curl-7_88_1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-27535.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"36"}]},{"events":[{"introduced":"0"},{"last_affected":"10.0"}]},{"events":[{"introduced":"8.2.0"},{"fixed":"8.2.12"}]},{"events":[{"introduced":"9.0.0"},{"fixed":"9.0.6"}]},{"events":[{"introduced":"0"},{"last_affected":"9.1.0"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}