{"id":"CVE-2021-22947","details":"When curl \u003e= 7.20.0 and \u003c= 7.78.0 connects to an IMAP or POP3 server to retrieve data using STARTTLS to upgrade to TLS security, the server can respond and send back multiple responses at once that curl caches. curl would then upgrade to TLS but not flush the in-queue of cached responses but instead continue using and trustingthe responses it got *before* the TLS handshake as if they were authenticated.Using this flaw, it allows a Man-In-The-Middle attacker to first inject the fake responses, then pass-through the TLS traffic from the legitimate server and trick curl into sending data back to the user thinking the attacker's injected data comes from the TLS-protected server.","aliases":["CURL-CVE-2021-22947"],"modified":"2026-05-15T12:03:16.096345755Z","published":"2021-09-29T20:15:08.253Z","related":["SUSE-SU-2021:14807-1","SUSE-SU-2021:3297-1","SUSE-SU-2021:3298-1","SUSE-SU-2021:3332-1","SUSE-SU-2021:3351-1","openSUSE-SU-2021:1384-1","openSUSE-SU-2021:3298-1","openSUSE-SU-2024:10582-1"],"database_specific":{"unresolved_ranges":[{"source":"CPE_FIELD","extracted_events":[{"fixed":"12.3"}],"cpes":["cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*"],"vendor_product":"apple:macos"},{"source":"CPE_FIELD","extracted_events":[{"last_affected":"9.0"},{"last_affected":"10.0"},{"last_affected":"11.0"}],"cpes":["cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*","cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*","cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"],"vendor_product":"debian:debian_linux"},{"source":"CPE_FIELD","extracted_events":[{"last_affected":"33"},{"last_affected":"35"}],"cpes":["cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*","cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*"],"vendor_product":"fedoraproject:fedora"},{"source":"CPE_FIELD","extracted_events":[{"last_affected":"11.3.2"}],"cpes":["cpe:2.3:a:oracle:commerce_guided_search:11.3.2:*:*:*:*:*:*:*"],"vendor_product":"oracle:commerce_guided_search"},{"source":"CPE_FIELD","extracted_events":[{"last_affected":"1.11.0"},{"last_affected":"22.1.3"}],"cpes":["cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:1.11.0:*:*:*:*:*:*:*","cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:22.1.3:*:*:*:*:*:*:*"],"vendor_product":"oracle:communications_cloud_native_core_binding_support_function"},{"source":"CPE_FIELD","extracted_events":[{"last_affected":"22.2.0"}],"cpes":["cpe:2.3:a:oracle:communications_cloud_native_core_console:22.2.0:*:*:*:*:*:*:*"],"vendor_product":"oracle:communications_cloud_native_core_console"},{"source":"CPE_FIELD","extracted_events":[{"last_affected":"1.10.0"}],"cpes":["cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.10.0:*:*:*:*:*:*:*"],"vendor_product":"oracle:communications_cloud_native_core_network_function_cloud_native_environment"},{"source":"CPE_FIELD","extracted_events":[{"last_affected":"1.15.0"},{"last_affected":"1.15.1"},{"last_affected":"22.1.2"},{"last_affected":"22.2.0"}],"cpes":["cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.0:*:*:*:*:*:*:*","cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.1:*:*:*:*:*:*:*","cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:22.1.2:*:*:*:*:*:*:*","cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:22.2.0:*:*:*:*:*:*:*"],"vendor_product":"oracle:communications_cloud_native_core_network_repository_function"},{"source":"CPE_FIELD","extracted_events":[{"last_affected":"1.8.0"}],"cpes":["cpe:2.3:a:oracle:communications_cloud_native_core_network_slice_selection_function:1.8.0:*:*:*:*:*:*:*"],"vendor_product":"oracle:communications_cloud_native_core_network_slice_selection_function"},{"source":"CPE_FIELD","extracted_events":[{"last_affected":"22.1.1"}],"cpes":["cpe:2.3:a:oracle:communications_cloud_native_core_security_edge_protection_proxy:22.1.1:*:*:*:*:*:*:*"],"vendor_product":"oracle:communications_cloud_native_core_security_edge_protection_proxy"},{"source":"CPE_FIELD","extracted_events":[{"last_affected":"1.15.0"}],"cpes":["cpe:2.3:a:oracle:communications_cloud_native_core_service_communication_proxy:1.15.0:*:*:*:*:*:*:*"],"vendor_product":"oracle:communications_cloud_native_core_service_communication_proxy"},{"source":"CPE_FIELD","extracted_events":[{"last_affected":"8.57"},{"last_affected":"8.58"},{"last_affected":"8.59"}],"cpes":["cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.57:*:*:*:*:*:*:*","cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.58:*:*:*:*:*:*:*","cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.59:*:*:*:*:*:*:*"],"vendor_product":"oracle:peoplesoft_enterprise_peopletools"},{"source":"CPE_FIELD","extracted_events":[{"fixed":"1.0.1.1"}],"cpes":["cpe:2.3:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:*"],"vendor_product":"siemens:sinec_infrastructure_network_services"},{"source":"CPE_FIELD","extracted_events":[{"introduced":"8.2.0"},{"fixed":"8.2.12"},{"introduced":"9.0.0"},{"fixed":"9.0.6"},{"last_affected":"9.1.0"}],"cpes":["cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:*","cpe:2.3:a:splunk:universal_forwarder:9.1.0:*:*:*:*:*:*:*"],"vendor_product":"splunk:universal_forwarder"}]},"references":[{"type":"ADVISORY","url":"http://seclists.org/fulldisclosure/2022/Mar/29"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2021/09/msg00022.html"},{"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/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202212-01"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20211029-0003/"},{"type":"ADVISORY","url":"https://support.apple.com/kb/HT213183"},{"type":"ADVISORY","url":"https://www.debian.org/security/2022/dsa-5197"},{"type":"REPORT","url":"https://hackerone.com/reports/1334763"},{"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"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpujul2022.html"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpuoct2021.html"}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N"}]}