CVE-2021-22890: Broadcom Fabric Operating System
Low severity, CVSS 3.7. EPSS: 3% chance of exploitation in the next 30 days.
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.
Affected products
- Broadcom Fabric Operating System: affected versions not specified
- Debian Debian Linux: version 9.0 only
- Fedoraproject Fedora: version 32 only; version 33 only; version 34 only
- Haxx Libcurl: from 7.63.0, up to and including 7.75.0
- Netapp Hci Management Node: affected versions not specified
- Netapp Hci Storage Node: affected versions not specified
- Netapp Solidfire: affected versions not specified
- Oracle Communications Billing And Revenue Management: version 12.0.0.3.0 only
- Oracle Essbase: version 21.2 only
- Siemens Sinec Infrastructure Network Services: before 1.0.1.1 (fixed in 1.0.1.1)
- Splunk Universal Forwarder: from 8.2.0, before 8.2.12 (fixed in 8.2.12); from 9.0.0, before 9.0.6 (fixed in 9.0.6); version 9.1.0 only
Published 2021-04-01. Last modified 2026-06-17.