CVE-2021-22897
- State
- Published
- Severity
- 5.3 Medium
- Published
- Jun 11, 2021
- Updated
- Oct 14, 2026
- Reserved
- Jan 6, 2021
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N | CISA-ADP |
Weaknesses
- CWE-840 Business Logic Errors (CWE-840)
Affected Products
| Product | Versions |
|---|---|
https://github.com/curl/curln/a |
|
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
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