Is CVE-2024-45397 in the CISA KEV catalog?

No. CVE-2024-45397 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2024-45397?

CVE-2024-45397 has a CVSS v3 base score of 5.9 (MEDIUM).

What is the EPSS score for CVE-2024-45397?

CVE-2024-45397 has an EPSS score of 0.44% (35th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2024-45397?

Upgrade h2o to 2024-10-10 or later.

CVE & CISA-KEV Catalog

CVE-2024-45397

MEDIUM

5.9

CVSS v3

NVD

Description

h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. When an HTTP request using TLS/1.3 early data on top of TCP Fast Open or QUIC 0-RTT packets is received and the IP-address-based access control is used, the access control does not detect and prohibit HTTP requests conveyed by packets with a spoofed source address. This behavior allows attackers on the network to execute HTTP requests from addresses that are otherwise rejected by the address-based access control. The vulnerability has been addressed in commit 15ed15a. Users may disable the use of TCP FastOpen and QUIC to mitigate the issue.

CWE-284Improper Access Control CWE-290

How to fix

Remediation Available

h2oNVD

Affected:< 2024-10-10Fixed in:2024-10-10CVE-2024-45397derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.44%probability of exploitation in 30 days

35thpercentile

Low risk: more likely to be exploited than 35% of all known CVEs.

References

Patch1

github.com

Vendor Advisory1

github.com

Product1

h2o.examp1e.net

Related Vulnerabilities

Other CWE-284 (Improper Access Control) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-27350	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2019-1653	High	7.5	100%	KEV	-
CVE-2023-23752	Medium	5.3	100%	KEV	Fix
CVE-2023-29298	High	7.5	100%	KEV	-
CVE-2023-38205	High	7.5	100%	KEV	-
CVE-2024-27348	Critical	9.8	99%	KEV	Fix

Embed a live status badge for CVE-2024-45397

Markdown

[![CVE-2024-45397](https://tridentstack.com/cve/badge/CVE-2024-45397.svg)](https://tridentstack.com/cve/CVE-2024-45397)

HTML

<a href="https://tridentstack.com/cve/CVE-2024-45397"><img src="https://tridentstack.com/cve/badge/CVE-2024-45397.svg" alt="CVE-2024-45397"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-12.