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CVE-2019-9511— Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service

Quick assessment

Affected
n/a n/a
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.

HTTP/2是超文本传输协议的第二版，主要用于保证客户机与服务器之间的通信。 HTTP/2中存在资源管理错误漏洞。攻击者可利用该漏洞导致拒绝服务。

AI Predicted 5.3 Difficulty: Moderate EPSS 59.55% · P99

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2019-9511

Vulnerability Information
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Vulnerability Title
Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service
Source: CVE Program / CVE List V5
Vulnerability Description
Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service. The attacker requests a large amount of data from a specified resource over multiple streams. They manipulate window size and stream priority to force the server to queue the data in 1-byte chunks. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
HTTP/2 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HTTP/2是超文本传输协议的第二版，主要用于保证客户机与服务器之间的通信。 HTTP/2中存在资源管理错误漏洞。攻击者可利用该漏洞导致拒绝服务。
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
- n/a n/a -

II. Public POCs for CVE-2019-9511

# POC Description Source Link Shenlong Link
1 based on nginx 1.19.5 to fix for CVE-2018-16843, CVE-2018-16844, CVE-2019-9511, CVE-2019-9513, and CVE-2019-9516 https://github.com/flyniu666/ingress-nginx-0.21-1.19.5 POC Details
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III. Intelligence Information for CVE-2019-9511

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Vendor Advisories for CVE-2019-9511 (30)

Mailing List Discussions for CVE-2019-9511 (13)

Other References for CVE-2019-9511 (3)

Same Patch Batch · n/a · 2019-08-13 · 51 CVEs total

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CVE-2019-9515 Some HTTP/2 implementations are vulnerable to a settings flood, potentially leading to a d
CVE-2019-9516 Some HTTP/2 implementations are vulnerable to a header leak, potentially leading to a deni
CVE-2019-9517 Some HTTP/2 implementations are vulnerable to unconstrained interal data buffering, potent
CVE-2019-9518 Some HTTP/2 implementations are vulnerable to a flood of empty frames, potentially leading
CVE-2019-14809 Google Go 输入验证错误漏洞
CVE-2019-9513 Some HTTP/2 implementations are vulnerable to resource loops, potentially leading to a den
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CVE-2015-9294 WordPress all-in-one-wp-security-and-firewall插件跨站脚本漏洞
CVE-2017-18489 WordPress contact-form-7-sms-addon插件跨站脚本漏洞
CVE-2017-18490 WordPress contact-form-multi插件跨站脚本漏洞
CVE-2017-18491 WordPress contact-form-plugin插件跨站脚本漏洞
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CVE-2015-9295 WordPress contact-form-plugin插件跨站脚本漏洞

Showing top 20 of 51 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: n/a
Same vendor: n/a
Same weakness: CWE-400

V. Comments for CVE-2019-9511

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