libcurl keeps previously used connections in a connection pool for subsequenttransfers to reuse, if one of them matches the setup.Due to errors in the logic, the config matching function did not take 'issuercert' into account and it compared the involved paths *case insensitively*,which could lead to libcurl reusing wrong connections.File paths are, or can be, case sensitive on many systems but not all, and caneven vary depending on used file systems.The comparison also didn't include the 'issuer cert' which a transfer can setto qualify how to verify the server certificate.
Fix
Public exploits 1
- Trinadh465/external_curl_AOSP10_r33_CVE-2021-22924 PoC on GitHub
Each line links to the index that lists it, never to exploit code. Exploit-DB's "verified" and a Metasploit rank of good or better count as verified; a PoC-in-GitHub entry is a repository's claim.
Patch, vendor advisory and mitigation references on NVD 8
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf Patch, Third Party Advisory
- https://hackerone.com/reports/1223565 Exploit, Issue Tracking, Patch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2022.html Patch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.html Patch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf Patch, Third Party Advisory
- https://hackerone.com/reports/1223565 Exploit, Issue Tracking, Patch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2022.html Patch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.html Patch, Third Party Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 3.7 · haxx, fedoraproject, debianNVD modified 2026-10-14 11:16
Affected (CPE criteria) 38
cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:*cpe:2.3:a:netapp:solidfire_\&_hci_management_node:-:*:*:*:*:*:*:*cpe:2.3:o:netapp:solidfire_baseboard_management_controller_firmware:-:*:*:*:*:*:*:*cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:*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:*:*:*:*:*:*:*cpe:2.3:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:sinema_remote_connect_server:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:logo\!_cmr2040_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:logo\!_cmr2020_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:ruggedcomrm_1224_lte_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:scalance_m804pb_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:scalance_m812-1_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:scalance_m816-1_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:scalance_m826-2_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:scalance_m874-2_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:scalance_m874-3_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:scalance_m876-3_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:scalance_m876-4_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:scalance_mum856-1_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:scalance_s615_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:simatic_cp_1543-1_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:simatic_cp_1545-1_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:simatic_rtu3010c_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:simatic_rtu3030c_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:simatic_rtu3031c_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:simatic_rtu_3041c_firmware:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:sinema_remote_connect:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:siplus_net_cp_1543-1_firmware:*:*:*:*:*:*:*:*cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:*cpe:2.3:a:splunk:universal_forwarder:9.1.0:*:*:*:*:*:*:*
References 34
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf Patch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-732250.pdf Third Party Advisory
- https://hackerone.com/reports/1223565 Exploit, Issue Tracking, Patch, Third Party Advisory
- https://lists.apache.org/thread.html/r61db8e7dcb56dc000a5387a88f7a473bacec5ee01b9ff3f55308aacc%40%3Cdev.kafka.apache.org%3E Mailing List, Third Party Advisory
- https://lists.apache.org/thread.html/r61db8e7dcb56dc000a5387a88f7a473bacec5ee01b9ff3f55308aacc%40%3Cusers.kafka.apache.org%3E Mailing List, Third Party Advisory
- https://lists.apache.org/thread.html/rbf4ce74b0d1fa9810dec50ba3ace0caeea677af7c27a97111c06ccb7%40%3Cdev.kafka.apache.org%3E Mailing List, Third Party Advisory
- https://lists.apache.org/thread.html/rbf4ce74b0d1fa9810dec50ba3ace0caeea677af7c27a97111c06ccb7%40%3Cusers.kafka.apache.org%3E Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/08/msg00017.html Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/08/msg00017.html Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FRUCW2UVNYUDZF72DQLFQR4PJEC6CF7V/ Mailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210902-0003/ Third Party Advisory
- https://www.debian.org/security/2022/dsa-5197 Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2022.html Patch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.html Patch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf Patch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-732250.pdf Third Party Advisory
- https://hackerone.com/reports/1223565 Exploit, Issue Tracking, Patch, Third Party Advisory
- https://lists.apache.org/thread.html/r61db8e7dcb56dc000a5387a88f7a473bacec5ee01b9ff3f55308aacc%40%3Cdev.kafka.apache.org%3E Mailing List, Third Party Advisory
- https://lists.apache.org/thread.html/r61db8e7dcb56dc000a5387a88f7a473bacec5ee01b9ff3f55308aacc%40%3Cusers.kafka.apache.org%3E Mailing List, Third Party Advisory
- https://lists.apache.org/thread.html/rbf4ce74b0d1fa9810dec50ba3ace0caeea677af7c27a97111c06ccb7%40%3Cdev.kafka.apache.org%3E Mailing List, Third Party Advisory
- https://lists.apache.org/thread.html/rbf4ce74b0d1fa9810dec50ba3ace0caeea677af7c27a97111c06ccb7%40%3Cusers.kafka.apache.org%3E Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/08/msg00017.html Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/08/msg00017.html Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FRUCW2UVNYUDZF72DQLFQR4PJEC6CF7V/ Mailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210902-0003/ Third Party Advisory
- https://www.debian.org/security/2022/dsa-5197 Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2022.html Patch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.html Patch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-389290.html
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
- https://cert-portal.siemens.com/productcert/html/ssa-484086.html
- https://cert-portal.siemens.com/productcert/html/ssa-732250.html