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CVE-2024-45397— H2O alllows bypassing address-based access control with 0-RTT

Quick assessment

Affected
h2o h2o
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

H2O是H2O.ai开源的一个用于分布式、可扩展机器学习的内存平台。 H2O存在访问控制错误漏洞，该漏洞源于访问控制不会检测和禁止由具有欺骗源地址的数据包传达的HTTP请求，允许攻击者从地址访问控制拒绝的地址执行HTTP请求。

CVSS 5.9 · Medium EPSS 0.44% · P36
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I. Basic Information for CVE-2024-45397

Vulnerability Information
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Vulnerability Title
H2O alllows bypassing address-based access control with 0-RTT
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
H2O 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
H2O是H2O.ai开源的一个用于分布式、可扩展机器学习的内存平台。 H2O存在访问控制错误漏洞，该漏洞源于访问控制不会检测和禁止由具有欺骗源地址的数据包传达的HTTP请求，允许攻击者从地址访问控制拒绝的地址执行HTTP请求。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
h2o h2o < 15ed15a2efb83a77bb4baaa5a119e639c2f6898a -

II. Public POCs for CVE-2024-45397

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III. Intelligence Information for CVE-2024-45397

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Same Patch Batch · h2o · 2024-10-11 · 5 CVEs total

CVE-2024-45402 8.6 HIGH Picotls double free
CVE-2024-45396 7.5 HIGH Quicly assertion failures
CVE-2024-45403 3.7 LOW H2O assertion failure when HTTP/3 requests are cancelled
CVE-2024-25622 3.1 LOW H2O ignores headers configuration directives

IV. Related Vulnerabilities

Same product: h2o
Same vendor: h2o
Same weakness: CWE-284

V. Comments for CVE-2024-45397

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