Vulnerability Description
curl 7.63.0 to and including 7.75.0 includes vulnerability that allows a malicious HTTPS proxy to MITM a connection due to bad handling of TLS 1.3 session tickets. When using a HTTPS proxy and TLS 1.3, libcurl can confuse session tickets arriving from the HTTPS proxy but work as if they arrived from the remote server and then wrongly "short-cut" the host handshake. When confusing the tickets, a HTTPS proxy can trick libcurl to use the wrong session ticket resume for the host and thereby circumvent the server TLS certificate check and make a MITM attack to be possible to perform unnoticed. Note that such a malicious HTTPS proxy needs to provide a certificate that curl will accept for the MITMed server for an attack to work - unless curl has been told to ignore the server certificate check.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Haxx | Libcurl | >= 7.63.0, <= 7.75.0 |
| Fedoraproject | Fedora | 32 |
| Netapp | Hci Management Node | - |
| Netapp | Solidfire | - |
| Netapp | Hci Storage Node | - |
| Broadcom | Fabric Operating System | - |
| Debian | Debian Linux | 9.0 |
| Siemens | Sinec Infrastructure Network Services | < 1.0.1.1 |
| Oracle | Communications Billing And Revenue Management | 12.0.0.3.0 |
| Oracle | Essbase | 21.2 |
| Splunk | Universal Forwarder | >= 8.2.0, < 8.2.12 |
Related Weaknesses (CWE)
References
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatchThird Party Advisory
- https://curl.se/docs/CVE-2021-22890.htmlPatchVendor Advisory
- https://hackerone.com/reports/1129529ExploitIssue TrackingPatch
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproMailing ListThird Party Advisory
- https://security.gentoo.org/glsa/202105-36Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210521-0007/Third Party Advisory
- https://www.oracle.com//security-alerts/cpujul2021.htmlThird Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatchThird Party Advisory
- https://curl.se/docs/CVE-2021-22890.htmlPatchVendor Advisory
- https://hackerone.com/reports/1129529ExploitIssue TrackingPatch
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproMailing ListThird Party Advisory
FAQ
What is CVE-2021-22890?
CVE-2021-22890 is a vulnerability with a CVSS score of 3.7 (LOW). curl 7.63.0 to and including 7.75.0 includes vulnerability that allows a malicious HTTPS proxy to MITM a connection due to bad handling of TLS 1.3 session tickets. When using a HTTPS proxy and TLS 1.3...
How severe is CVE-2021-22890?
CVE-2021-22890 has been rated LOW with a CVSS base score of 3.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-22890?
Check the references section above for vendor advisories and patch information. Affected products include: Haxx Libcurl, Fedoraproject Fedora, Netapp Hci Management Node, Netapp Solidfire, Netapp Hci Storage Node.