FreeBSD VuXML: Documenting security issues in FreeBSD and the FreeBSD Ports Collection

go -- crypto/tls: clients can panic when provided a certificate of the wrong type for the negotiated parameters

Affected packages
go < 1.16.6,1

Details

VuXML ID c365536d-e3cf-11eb-9d8d-b37b683944c2
Discovery 2021-07-07
Entry 2021-07-12

The Go project reports:

crypto/tls clients can panic when provided a certificate of the wrong type for the negotiated parameters. net/http clients performing HTTPS requests are also affected. The panic can be triggered by an attacker in a privileged network position without access to the server certificate's private key, as long as a trusted ECDSA or Ed25519 certificate for the server exists (or can be issued), or the client is configured with Config.InsecureSkipVerify. Clients that disable all TLS_RSA cipher suites (that is, TLS 1.0–1.2 cipher suites without ECDHE), as well as TLS 1.3-only clients, are unaffected.

References

CVE Name CVE-2021-34558
URL https://github.com/golang/go/issues/47143