CVE-2023-49295 MEDIUM

CVE-2023-49295: quic-go's path validation mechanism can cause denial of service

Vendor Quic-Go
Product quic-go
Weakness CWE-400
Published January 10, 2024
Last update June 17, 2025
View on NVD All CVEs

CVSS base score

6.4/10
Attack vector Network
Attack complexity High
Privileges required Low
User interaction None
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H

What the vulnerability does

01Description

quic-go is an implementation of the QUIC protocol (RFC 9000, RFC 9001, RFC 9002) in Go. An attacker can cause its peer to run out of memory sending a large number of PATH_CHALLENGE frames. The receiver is supposed to respond to each PATH_CHALLENGE frame with a PATH_RESPONSE frame. The attacker can prevent the receiver from sending out (the vast majority of) these PATH_RESPONSE frames by collapsing the peers congestion window (by selectively acknowledging received packets) and by manipulating the peer's RTT estimate. This vulnerability has been patched in versions 0.37.7, 0.38.2 and 0.39.4.

Key dates

02Disclosure timeline

January 10, 2024 CVE published
June 17, 2025 Record updated