{"id":"CVE-2016-5420","details":"curl and libcurl before 7.50.1 do not check the client certificate when choosing the TLS connection to reuse, which might allow remote attackers to hijack the authentication of the connection by leveraging a previously created connection with a different client certificate.","aliases":["CURL-CVE-2016-5420"],"modified":"2026-07-08T05:49:10.709062970Z","published":"2016-08-10T14:59:05.080Z","related":["SUSE-SU-2016:2155-1","SUSE-SU-2016:2330-1","SUSE-SU-2016:2449-1","SUSE-SU-2016:2700-1","SUSE-SU-2017:2699-1","SUSE-SU-2017:2700-1"],"database_specific":{"unresolved_ranges":[{"extracted_events":[{"introduced":"8.0"},{"last_affected":"8.0"}],"source":"CPE_STRING","vendor_product":"debian:debian_linux","cpes":["cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*"]},{"cpes":["cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"42.1"},{"last_affected":"42.1"}],"source":"CPE_STRING","vendor_product":"opensuse:leap"}]},"references":[{"type":"WEB","url":"http://lists.opensuse.org/opensuse-updates/2016-09/msg00011.html"},{"type":"WEB","url":"http://www.securityfocus.com/bid/92309"},{"type":"WEB","url":"http://www.securitytracker.com/id/1036537"},{"type":"WEB","url":"http://www.securitytracker.com/id/1036739"},{"type":"WEB","url":"http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.563059"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GLPXQQKURBQFM4XM6645VRPTOE2AWG33/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K3GQH4V3XAQ5Z53AMQRDEC3C3UHTW7QR/"},{"type":"WEB","url":"https://source.android.com/security/bulletin/2016-12-01.html"},{"type":"WEB","url":"https://www.tenable.com/security/tns-2016-18"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-updates/2016-09/msg00094.html"},{"type":"ADVISORY","url":"http://rhn.redhat.com/errata/RHSA-2016-2575.html"},{"type":"ADVISORY","url":"http://rhn.redhat.com/errata/RHSA-2016-2957.html"},{"type":"ADVISORY","url":"http://www.debian.org/security/2016/dsa-3638"},{"type":"ADVISORY","url":"http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html"},{"type":"ADVISORY","url":"http://www.ubuntu.com/usn/USN-3048-1"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2018:3558"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/201701-47"},{"type":"FIX","url":"https://curl.haxx.se/docs/adv_20160803B.html"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/curl/curl","events":[{"introduced":"0"},{"last_affected":"79e63a53bb9598af863b0afe49ad662795faeef4"}],"database_specific":{"source":"CPE_RANGE","cpe":"cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"7.50.0"}]}}],"versions":["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","curl-7_7-beta5","curl-7_7-beta3","curl-7_7-beta2","curl-7_7-beta1","curl-7_7_alpha2","curl-7_6_1","curl-7_6_1-pre3","curl-7_6_1-pre2","curl-7_6_1-pre1","curl-7_6","curl-7_6-pre4","curl_7_6-pre3","curl-7_5_2","curl-7_5","curl-7_4_1","curl-7_3","curl-7_2","curl-7_1_1","curl-6_5_2","curl-6_5_1","curl-6_5"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-5420.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"}]}