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Vulnerability · Published Oct 31, 2023 · Assigned by GitHub_M

CVE-2023-46239quic-go vulnerable to pointer dereference that can lead to panic

High 7.5

In plain English

A high-severity security flaw in quic-go from quic-go. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 62% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)1.0%top 38.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

quic-go is an implementation of the QUIC protocol in Go. Starting in version 0.37.0 and prior to version 0.37.3, by serializing an ACK frame after the CRYTPO that allows a node to complete the handshake, a remote node could trigger a nil pointer dereference (leading to a panic) when the node attempted to drop the Handshake packet number space. An attacker can bring down a quic-go node with very minimal effort. Completing the QUIC handshake only requires sending and receiving a few packets. Version 0.37.3 contains a patch. Versions before 0.37.0 are not affected.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Gogithub.com/quic-go/quic-go0.37.3GHSA-3q6m-v84f-6p9h
Gogithub.com/quic-go/quic-go0.37.3GO-2023-2160
Ubuntu:22.04:LTSgolang-github-lucas-clemente-quic-gono fix listedUBUNTU-CVE-2023-46239
Ubuntu:24.04:LTSgolang-github-lucas-clemente-quic-gono fix listedUBUNTU-CVE-2023-46239
Ubuntu:25.10golang-github-lucas-clemente-quic-gono fix listedUBUNTU-CVE-2023-46239
Ubuntu:26.04:LTSgolang-github-lucas-clemente-quic-gono fix listedUBUNTU-CVE-2023-46239
Ubuntu:26.10golang-github-lucas-clemente-quic-gono fix listedUBUNTU-CVE-2023-46239

Affected products (as reported)

VendorProductVersions
quic-go quic-go >= 0.37.0, < 0.37.3

Weakness: CWE-248 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References