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CVE-2022-37436— Apache HTTP Server: mod_proxy prior to 2.4.55 allows a backend to trigger HTTP response splitting

Quick assessment

Affected
Apache Software Foundation Apache HTTP Server
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache HTTP Server是美国阿帕奇（Apache）基金会的一款开源网页服务器。该服务器具有快速、可靠且可通过简单的API进行扩充的特点。 Apache HTTP Server 2.4.55之前版本存在注入漏洞。攻击者利用该漏洞导致响应标头提前被截断，从而导致一些标头被合并到响应主体中。

AI Predicted 6.1 Difficulty: Moderate EPSS 55.91% · P99

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2022-37436

Vulnerability Information
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Vulnerability Title
Apache HTTP Server: mod_proxy prior to 2.4.55 allows a backend to trigger HTTP response splitting
Source: CVE Program / CVE List V5
Vulnerability Description
Prior to Apache HTTP Server 2.4.55, a malicious backend can cause the response headers to be truncated early, resulting in some headers being incorporated into the response body. If the later headers have any security purpose, they will not be interpreted by the client.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
HTTP头部中CRLF序列转义处理不恰当(HTTP响应分割)
Source: CVE Program / CVE List V5
Vulnerability Title
Apache HTTP Server 注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache HTTP Server是美国阿帕奇（Apache）基金会的一款开源网页服务器。该服务器具有快速、可靠且可通过简单的API进行扩充的特点。 Apache HTTP Server 2.4.55之前版本存在注入漏洞。攻击者利用该漏洞导致响应标头提前被截断，从而导致一些标头被合并到响应主体中。
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
Apache Software Foundation Apache HTTP Server 0 ~ 2.4.55 -

II. Public POCs for CVE-2022-37436

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III. Intelligence Information for CVE-2022-37436

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Vendor Advisories for CVE-2022-37436 (2)

Same Patch Batch · Apache Software Foundation · 2023-01-17 · 3 CVEs total

CVE-2022-36760 Apache HTTP Server: mod_proxy_ajp Possible request smuggling
CVE-2006-20001 Apache HTTP Server: mod_dav out of bounds read, or write of zero byte

IV. Related Vulnerabilities

Same product: Apache HTTP Server
Same vendor: Apache Software Foundation
Same weakness: CWE-113

V. Comments for CVE-2022-37436

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