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 Details
- CVSS 3.1 Base Score: 5.3
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | alpine-linux-upgrade-curl | Aug 22, 2024 | Jun 11, 2021 | |
| Huawei Euleros 2_0_sp8 | huawei-euleros-2_0_sp8-upgrade-curlhuawei-euleros-2_0_sp8-upgrade-libcurlhuawei-euleros-2_0_sp8-upgrade-libcurl-devel | Aug 10, 2021 | Jun 11, 2021 | |
| Huawei Euleros 2_0_sp9 | huawei-euleros-2_0_sp9-upgrade-curlhuawei-euleros-2_0_sp9-upgrade-libcurl | Aug 10, 2021 | Jun 11, 2021 | |
| Oracle Solaris | oracle-solaris-11-4-upgrade-web-curl-7-79-0-11-4-39-0-1-107-0 | Nov 17, 2021 | Jun 11, 2021 | |
| Splunk | splunk-upgrade-latest | Sep 30, 2025 | Jun 11, 2021 | |
| Vmware Photon_os | vmware-photon_os_update_tdnf | Jan 20, 2025 | Jun 11, 2021 |
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