CVE-2024-45396— Quicly assertion failures
Quick assessment
Affected
h2o quicly
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
quicly是H2O开源的一个 IETF QUIC 协议的实现。 quicly存在安全漏洞，该漏洞源于容易受到拒绝服务攻击，远程攻击者可以利用该漏洞触发断言失败，从而导致进程崩溃。
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2024-45396
Vulnerability Information
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Vulnerability Title
Quicly assertion failures
Source: CVE Program / CVE List V5
Vulnerability Description
Quicly is an IETF QUIC protocol implementation. Quicly up to commtit d720707 is susceptible to a denial-of-service attack. A remote attacker can exploit these bugs to trigger an assertion failure that crashes process using quicly. The vulnerability is addressed with commit 2a95896104901589c495bc41460262e64ffcad5c.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可达断言
Source: CVE Program / CVE List V5
Vulnerability Title
quicly 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
quicly是H2O开源的一个 IETF QUIC 协议的实现。 quicly存在安全漏洞，该漏洞源于容易受到拒绝服务攻击，远程攻击者可以利用该漏洞触发断言失败，从而导致进程崩溃。
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
II. Public POCs for CVE-2024-45396
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Qwen3.6-35B-A3B
· 7829 chars
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III. Intelligence Information for CVE-2024-45396
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Same Patch Batch · h2o · 2024-10-11 · 5 CVEs total
| CVE-2024-45402 | 8.6 HIGH | Picotls double free |
| CVE-2024-45397 | 5.9 MEDIUM | H2O alllows bypassing address-based access control with 0-RTT |
| 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
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CVE-2026-44436
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Same weakness: CWE-617
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V. Comments for CVE-2024-45396
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