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CVE-2024-45402— Picotls double free

Quick assessment

Affected
h2o picotls
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.

picotls是H2O开源的一个用 C 编写的 RFC 8446 协议栈。 Picotls存在资源管理错误漏洞，该漏洞源于存在双重释放，可能会导致释放后重用，也可能允许任意代码执行。

CVSS 8.6 · High EPSS 0.48% · P41

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2024-45402

Vulnerability Information
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Vulnerability Title
Picotls double free
Source: CVE Program / CVE List V5
Vulnerability Description
Picotls is a TLS protocol library that allows users select different crypto backends based on their use case. When parsing a spoofed TLS handshake message, picotls (specifically, bindings within picotls that call the crypto libraries) may attempt to free the same memory twice. This double free occurs during the disposal of multiple objects without any intervening calls to malloc Typically, this triggers the malloc implementation to detect the error and abort the process. However, depending on the internals of malloc and the crypto backend being used, the flaw could potentially lead to a use-after-free scenario, which might allow for arbitrary code execution. The vulnerability is addressed with commit 9b88159ce763d680e4a13b6e8f3171ae923a535d.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
双重释放
Source: CVE Program / CVE List V5
Vulnerability Title
Picotls 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
picotls是H2O开源的一个用 C 编写的 RFC 8446 协议栈。 Picotls存在资源管理错误漏洞，该漏洞源于存在双重释放，可能会导致释放后重用，也可能允许任意代码执行。
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 picotls < 9b88159ce763d680e4a13b6e8f3171ae923a535d -

II. Public POCs for CVE-2024-45402

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 8788 chars
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III. Intelligence Information for CVE-2024-45402

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Patches & Fixes for CVE-2024-45402 (1)

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

CVE-2024-45396 7.5 HIGH Quicly assertion failures
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

Same product: picotls
Same vendor: h2o
Same weakness: CWE-415