CVE-2024-2466

libcurl did not check the server certificate of TLS connections done to a host specified as an IP address, when built to use mbedTLS. libcurl would wrongly avoid using the set hostname function when the specified hostname was given as an IP address, therefore completely skipping the certificate check. This affects all uses of TLS protocols (HTTPS, FTPS, IMAPS, POPS3, SMTPS, etc).

• CWE-297

• http://seclists.org/fulldisclosure/2024/Jul/18Mailing List, Third Party Advisory
• http://seclists.org/fulldisclosure/2024/Jul/19Mailing List, Third Party Advisory
• http://seclists.org/fulldisclosure/2024/Jul/20Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2024/03/27/4Mailing List, Third Party Advisory
• https://curl.se/docs/CVE-2024-2466.htmlVendor Advisory
• https://curl.se/docs/CVE-2024-2466.jsonVendor Advisory
• https://hackerone.com/reports/2416725Exploit, Issue Tracking, Third Party Advisory
• https://security.netapp.com/advisory/ntap-20240503-0010/Third Party Advisory
• https://support.apple.com/kb/HT214118Release Notes, Vendor Advisory
• https://support.apple.com/kb/HT214119Release Notes, Vendor Advisory
• https://support.apple.com/kb/HT214120Release Notes, Vendor Advisory
• http://seclists.org/fulldisclosure/2024/Jul/18Mailing List, Third Party Advisory
• http://seclists.org/fulldisclosure/2024/Jul/19Mailing List, Third Party Advisory
• http://seclists.org/fulldisclosure/2024/Jul/20Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2024/03/27/4Mailing List, Third Party Advisory
• https://curl.se/docs/CVE-2024-2466.htmlVendor Advisory
• https://curl.se/docs/CVE-2024-2466.jsonVendor Advisory
• https://hackerone.com/reports/2416725Exploit, Issue Tracking, Third Party Advisory
• https://security.netapp.com/advisory/ntap-20240503-0010/Third Party Advisory
• https://support.apple.com/kb/HT214118Release Notes, Vendor Advisory
• https://support.apple.com/kb/HT214119Release Notes, Vendor Advisory
• https://support.apple.com/kb/HT214120Release Notes, Vendor Advisory
• https://www.vicarius.io/vsociety/posts/tls-certificate-check-bypass-curl-with-mbedtls-cve-2024-2466-2468Exploit, Mitigation, Third Party Advisory

Published

Mar 27, 2024

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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