DEBIAN-CVE-2021-22890
- Source
- https://security-tracker.debian.org/tracker/DEBIAN-CVE-2021-22890
- Import Source
- https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-22890.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2021-22890
- Upstream
- Published
- 2021-04-01T18:15:12Z
- Modified
- 2025-09-18T05:20:00Z
- Summary
- [none]
- Details
-
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.
- References
Affected packages
Debian:11 / curl
Package
- Name
- curl
- Purl
- pkg:deb/debian/curl?arch=source
Debian:12 / curl
Package
- Name
- curl
- Purl
- pkg:deb/debian/curl?arch=source
Debian:13 / curl
Package
- Name
- curl
- Purl
- pkg:deb/debian/curl?arch=source
Debian:14 / curl
Package
- Name
- curl
- Purl
- pkg:deb/debian/curl?arch=source