REDHAT-BUG-2403125: Medium severity Quic-go quic-go vulnerability

Published Oct 10, 2025
·
Updated

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 HANDSHAKEDONE frame. Versions 0.49.0, 0.54.1, and 0.55.0 discard Initial keys when receiving a HANDSHAKEDONE frame, thereby correctly handling premature HANDSHAKEDONE frames.

Affected Software

1 affected component
Quic-go quic-go<0.49.0, <0.54.1, <0.55.0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade quic-go to a version that resolves this vulnerability.

    Fixed in 0.49.0
  2. Upgrade

    Upgrade quic-go to a version that resolves this vulnerability.

    Fixed in 0.54.1
  3. Upgrade

    Upgrade quic-go to a version that resolves this vulnerability.

    Fixed in 0.55.0

Event History

Oct 10, 2025
Data Sourced
via Red Hat·05:01 PM
DescriptionSeverityAffected Software
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Frequently Asked Questions

1

What is the severity of REDHAT-BUG-2403125?

The severity of REDHAT-BUG-2403125 is considered critical as it allows a denial-of-service (DoS) attack.

2

How do I fix REDHAT-BUG-2403125?

To fix REDHAT-BUG-2403125, upgrade quic-go to version 0.49.0, 0.54.1, or 0.55.0 or later.

3

What are the affected versions of quic-go in REDHAT-BUG-2403125?

Affected versions of quic-go in REDHAT-BUG-2403125 are all versions prior to 0.49.0, 0.54.1, and 0.55.0.

4

What type of attack does REDHAT-BUG-2403125 enable?

REDHAT-BUG-2403125 enables a denial-of-service (DoS) attack, which can crash the client.

5

Is authentication required to exploit REDHAT-BUG-2403125?

No, exploitation of REDHAT-BUG-2403125 does not require any authentication.

Contact

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