CVE-2023-49295 - CVE House

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Status published Medium CVE-2023-49295

quic-go's path validation mechanism can cause denial of service

6.4 CVSS

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

More from quic-go

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quic-go HTTP/3 QPACK Header Expansion DoS

quic-go has Client Crash Due to Premature HANDSHAKE_DONE Frame

quic-go Has Panic in Path Probe Loss Recovery Handling

quic-go affected by an ICMP Packet Too Large Injection Attack on Linux

QUIC's Connection ID Mechanism vulnerable to Memory Exhaustion Attack

Affected Vendor

quic-go

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Affected Software

quic-go

Vulnerable Versions:

= 0.40.0, >= 0.39.0, < 0.39.4, >= 0.38.0, < 0.38.2, < 0.37.7

Timeline

Official Publish: January 10th, 2024

Last Modified: June 17th, 2025

Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1499 Endpoint Denial of Service

T1498 Network Denial of Service