CVE-2021-22897
curl 7.61.0 through 7.76.1 suffers from exposure of data element to wrong session due to a mistake in the code for CURLOPT_SSL_CIPHER_LIST when libcurl is built to use the Schannel TLS library. The selected cipher set was stored in a single "static" variable in the library, which has the surprising side-effect that if an application sets up multiple concurrent transfers, the last one that sets the ciphers will accidentally control the set used by all transfers. In a worst-case scenario, this weakens transport security significantly.
- CVSS 3.1
- 5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - EPSS
- 4.3% chance of exploitation in the next 30 days; higher than 91% of CVEs (scores of 2026-10-25)
- CWEs
- CWE-668, CWE-840
- Published
- Modified
- Record from
- the NVD, synced
Affected
- haxx:curl
- netapp:cloud_backup
- netapp:h300e_firmware
- netapp:h300s_firmware
- netapp:h410s_firmware
- netapp:h500e_firmware
- netapp:h500s_firmware
- netapp:h700e_firmware
- netapp:h700s_firmware
- netapp:hci_compute_node_firmware
- netapp:solidfire\,_enterprise_sds_\&_hci_storage_node
- netapp:solidfire_\&_hci_management_node
- netapp:solidfire_baseboard_management_controller_firmware
- oracle:communications_cloud_native_core_binding_support_function
- oracle:communications_cloud_native_core_network_function_cloud_native_environment
- oracle:communications_cloud_native_core_network_repository_function
- oracle:communications_cloud_native_core_network_slice_selection_function
- oracle:communications_cloud_native_core_service_communication_proxy
- oracle:essbase
- oracle:mysql_server
- siemens:sinec_infrastructure_network_services
- splunk:universal_forwarder