curl: curl 7.63.0 to and including 7.75.0 includes vulnerability that allows a malicious HTTPS proxy to MITM a connection d...
CVE-2021-22890 is fixed in 4 products on 1 platform, first by curl 7.68.0-1ubuntu2.5, released March 30, 2021. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| curl · Ubuntu 20.04 LTS (focal) | 7.68.0-1ubuntu2.5 | curl 7.68.0-1ubuntu2.5 | Mar 30, 2021 |
| libcurl3-gnutls · Ubuntu 20.04 LTS (focal) | 7.68.0-1ubuntu2.5 | libcurl3-gnutls 7.68.0-1ubuntu2.5 | Mar 30, 2021 |
| libcurl3-nss · Ubuntu 20.04 LTS (focal) | 7.68.0-1ubuntu2.5 | libcurl3-nss 7.68.0-1ubuntu2.5 | Mar 30, 2021 |
| libcurl4 · Ubuntu 20.04 LTS (focal) | 7.68.0-1ubuntu2.5 | libcurl4 7.68.0-1ubuntu2.5 | Mar 30, 2021 |
Patch Radar data is free to use with attribution. Terms and how to credit it.
Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.