CVE-2025-59530
quic-go is an implementation of the QUIC protocol in Go. In versions prior to 0.49.0, 0.54.1, and 0.55.0, a misbehaving or malicious server can cause a denial-of-service (DoS) attack on the quic-go client by triggering an assertion failure, leading to a process crash. This requires no authentication and can be exploited during the handshake phase. This was observed in the wild with certain server implementations. quic-go needs to be able to handle misbehaving server implementations, including those that prematurely send a HANDSHAKE_DONE frame. Versions 0.49.0, 0.54.1, and 0.55.0 discard Initial keys when receiving a HANDSHAKE_DONE frame, thereby correctly handling premature HANDSHAKE_DONE frames.
| Software | From | Fixed in |
|---|---|---|
github.com/quic-go/quic-go
|
- | 0.49.1 |
|
github.com/quic-go/quic-go
|
0.50.0 | 0.54.1 |
- https://github.com/quic-go/quic-go/blob/v0.55.0/connection.go#L2682-L2685
- https://github.com/quic-go/quic-go/commit/bc5bccf10fd02728eef150683eb4dfaa5c0e749c
- https://github.com/quic-go/quic-go/commit/ce7c9ea8834b9d2ed79efa9269467f02c0895d42
- https://github.com/quic-go/quic-go/pull/5354
- https://github.com/quic-go/quic-go/security/advisories/GHSA-47m2-4cr7-mhcw
- https://pkg.go.dev/vuln/GO-2025-4017
Deep Security Visibility Without the Complexity
SynScan provides clear, real-time security insights so you can monitor your attack surface, spot risks early, and act fast—without extra complexity.
- No setup fees
- 5-min deployment
- Cancel anytime