vulnerability

Arch Linux: Denial of service (CVE-2021-34558)

Severity
3
CVSS
(AV:N/AC:H/Au:N/C:N/I:N/A:P)
Published
Jul 15, 2021
Added
Jul 11, 2025
Modified
Nov 27, 2025

Description

A security issue has been found in Go before version 1.16.6. 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.

Solution

arch-linux-upgrade-latest

References

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