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.
- Score
- CVSS 3.1 5.3 Medium
- Status
- Modified - support@hackerone.com
- Published
- 2021-06-11
- Last modified
- 2026-10-14
- Weaknesses
- CWE-668, CWE-840
Affected products
- Curl (Haxx)
- 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 (Netapp)
- 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 (Oracle)
- Simatic S7-1500 Cpu 1518-4 Pndp Mfp (Siemens)
- Simatic S7-1500 Cpu 1518f-4 Pndp Mfp (Siemens)
- Sinec Infrastructure Network Services (Siemens)
- Siplus S7-1500 Cpu 1518-4 Pndp Mfp (Siemens)
- Universal Forwarder (Splunk)
References
- https://hackerone.com/reports/1172857
- https://curl.se/docs/CVE-2021-22897.html
- https://github.com/curl/curl/commit/bbb71507b7bab52002f9b1e0880bed6a32834511
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://security.netapp.com/advisory/ntap-20210727-0007/
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
- https://cert-portal.siemens.com/productcert/html/ssa-389290.html
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
