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CVE-2023-49295

19
FAUCET Score

CVE-2023-49295 affects quic-go, an implementation of the QUIC protocol, allowing a remote attacker to induce a denial-of-service condition by exhausting the peer's memory. The attacker achieves this by sending numerous PATH_CHALLENGE frames and then manipulating the congestion window and RTT estimate to prevent the receiver from responding. Rated as Medium severity (CVSS 6.5), this vulnerability has a low attack complexity and can lead to high availability impact. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.37.7CPE matchmatch criteria
cpe:2.3:a:quic-go_project:quic-go:*:*:*:*:*:*:*:*
>= 0.38.0, < 0.38.2CPE matchmatch criteria
cpe:2.3:a:quic-go_project:quic-go:*:*:*:*:*:*:*:*
>= 0.39.0, < 0.39.4CPE matchmatch criteria
cpe:2.3:a:quic-go_project:quic-go:*:*:*:*:*:*:*:*
0.40.0CPE matchmatch criteria
cpe:2.3:a:quic-go_project:quic-go:0.40.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.4MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
HIGH
Exploitability Score
1.6
Impact Score
4.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.19%
Probability of exploitation in next 30 days
EPSS Percentile
64.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0119 is in the 79th percentile among its peer group of 21,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (26)

github_advisorypatch availablevia nvd_reference
View patch
gopatch availablevia ghsa
Product: github.com/quic-go/quic-goFixed in: 0.40.1
gopatch availablevia ghsa
Product: github.com/quic-go/quic-goFixed in: 0.39.4
gopatch availablevia ghsa
Product: github.com/quic-go/quic-goFixed in: 0.38.2
gopatch availablevia ghsa
Product: github.com/quic-go/quic-goFixed in: 0.37.7
microsoftpatch availablevia msrc
Product: azl3 coredns 1.11.1-4 on Azure Linux 3.0Fixed in: 1.11.1-2
microsoftpatch availablevia msrc
Product: Azure Linux 3.0 x64Fixed in: 1.11.1-2
microsoftpatch availablevia msrc
Product: Azure Linux 3.0 ARMFixed in: 1.11.1-2
microsoftpatch availablevia msrc
Product: 19867-17086Fixed in: 1.11.1-5
microsoftpatch availablevia msrc
Product: 18193-16823Fixed in: 1.11.1-5
microsoftpatch availablevia msrc
Product: 17749-17084Fixed in: 1.11.1-2
microsoftpatch availablevia msrc
Product: 19869-17084Fixed in: 1.11.1-2
microsoftpatch availablevia msrc
Product: cbl2 coredns 1.11.1-18 on CBL Mariner 2.0Fixed in: 1.11.1-5
microsoftpatch availablevia msrc
Product: cbl2 coredns 1.11.1-5 on CBL Mariner 2.0Fixed in: 1.11.1-5
microsoftpatch availablevia msrc
Product: azl3 coredns 1.11.1-2 on Azure Linux 3.0Fixed in: 1.11.1-2
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 1.11.1-5
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 1.11.1-5
redhatpatch availablevia redhat_api
Product: Red Hat Ansible Automation Platform 2.4 for RHEL 9Fixed in: receptor-0:1.4.4-1.el9ap
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Ansible Automation Platform 2.4 for RHEL 8Fixed in: receptor-0:1.4.4-1.el8ap
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat OpenShift Dev SpacesFixed in: devspaces/traefik-rhel8
redhatno patchvia redhat_api
Product: Red Hat Advanced Cluster Management for Kubernetes 2Fixed in: rhacm2/volsync-mover-rclone-rhel8
redhatno patchvia redhat_api
Product: Red Hat Advanced Cluster Management for Kubernetes 2Fixed in: rhacm2/volsync-mover-syncthing-rhel8
redhatno patchvia redhat_api
Product: Red Hat Advanced Cluster Management for Kubernetes 2Fixed in: rhacm2/lighthouse-agent-rhel9
redhatno patchvia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: openshift4/ose-coredns-rhel9
redhatno patchvia redhat_api
Product: Red Hat Advanced Cluster Management for Kubernetes 2Fixed in: rhacm2/volsync-rhel8
redhatend of lifevia redhat_api
Product: OpenShift Service Mesh 2Fixed in: openshift-service-mesh/istio-cni-rhel8

Vendor Advisories (4)

microsoft2024-Sep/CVE-2023-49295

CVE-2023-49295

Sep 10, 2024
goGHSA-ppxx-5m9h-6vxfmedium

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

Jan 10, 2024
redhatCVE-2023-49295Moderate

quic-go: memory exhaustion attack against QUIC's path validation mechanism

Jan 10, 2024
microsoft2024-Jan/CVE-2023-49295Moderate

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

Jan 9, 2024

References

github.com / quic-go/quic-go/commit/17fc98c2d81dbe685c19702dc694a9d606ac56dc
Patch
github.com / quic-go/quic-go/commit/21609ddfeff93668c7625a85eb09f1541fdad965
Patch
github.com / quic-go/quic-go/commit/3a9c18bcd27a01c551ac9bf8bd2b4bded77c189a
Patch
github.com / quic-go/quic-go/commit/554d543b50b917369fb1394cc5396d928166cf49
Patch
github.com / quic-go/quic-go/commit/6cc3d58935426191296171a6c0d1ee965e10534e
Patch
github.com / quic-go/quic-go/commit/9aaefe19fc3dc8c8917cc87e6128bb56d9e9e6cc
Patch
github.com / quic-go/quic-go/commit/a0ffa757499913f7be69aa78f573a6aee3430ae4
Patch
github.com / quic-go/quic-go/commit/d7aa627ebde91cf799ada2a07443faa9b1e5abb8
Patch
github.com / quic-go/quic-go/security/advisories/GHSA-ppxx-5m9h-6vxf
Vendor Advisory
lists.fedoraproject.org / archives/list/[email protected]/message/G5RSHDTVMYAIGYVVFGKTMFHAZJMA3EVV
lists.fedoraproject.org / archives/list/[email protected]/message/ZE7IOKXX5AATU2WR3V76X5Y3A44QAATG