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CVE-2024-47252— Apache HTTP Server: mod_ssl error log variable escaping

Quick assessment

Affected
Apache Software Foundation Apache HTTP Server
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.

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 2.4.63及之前版本存在安全漏洞，该漏洞源于mod_ssl对用户提供数据转义不足，可能导致日志文件插入转义字符。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.69% · P50
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I. Basic Information for CVE-2024-47252

Vulnerability Information
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Vulnerability Title
Apache HTTP Server: mod_ssl error log variable escaping
Source: CVE Program / CVE List V5
Vulnerability Description
Insufficient escaping of user-supplied data in mod_ssl in Apache HTTP Server 2.4.63 and earlier allows an untrusted SSL/TLS client to insert escape characters into log files in some configurations. In a logging configuration where CustomLog is used with "%{varname}x" or "%{varname}c" to log variables provided by mod_ssl such as SSL_TLS_SNI, no escaping is performed by either mod_log_config or mod_ssl and unsanitized data provided by the client may appear in log files.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
转义、元或控制序列转义处理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Apache HTTP Server 安全漏洞
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 2.4.63及之前版本存在安全漏洞，该漏洞源于mod_ssl对用户提供数据转义不足，可能导致日志文件插入转义字符。
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 2.4 ~ 2.4.63 -

II. Public POCs for CVE-2024-47252

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III. Intelligence Information for CVE-2024-47252

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Vendor Advisories for CVE-2024-47252 (1)

Same Patch Batch · Apache Software Foundation · 2025-07-10 · 11 CVEs total

CVE-2024-42516 Apache HTTP Server: HTTP response splitting
CVE-2024-43204 Apache HTTP Server: SSRF with mod_headers setting Content-Type header
CVE-2024-43394 Apache HTTP Server: SSRF on Windows due to UNC paths
CVE-2025-23048 Apache HTTP Server: mod_ssl access control bypass with session resumption
CVE-2025-49630 Apache HTTP Server: mod_proxy_http2 denial of service
CVE-2025-49812 Apache HTTP Server: mod_ssl TLS upgrade attack
CVE-2025-53020 Apache HTTP Server: HTTP/2 DoS by Memory Increase
CVE-2025-52434 Apache Tomcat: APR/Native Connector crash leading to DoS
CVE-2025-52520 Apache Tomcat: DoS via integer overflow in multipart file upload
CVE-2025-53506 Apache Tomcat: DoS via excessive h2 streams at connection start

IV. Related Vulnerabilities

Same product: Apache HTTP Server
Same vendor: Apache Software Foundation
Same weakness: CWE-150

V. Comments for CVE-2024-47252

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