CVE-2021-42013— Apache HTTP Server 安全漏洞
一分钟漏洞结论
影响对象
Apache Software Foundation Apache HTTP Server
利用判断
已确认在野利用，应立即处置
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
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 存在安全漏洞，该漏洞源于发现 Apache HTTP Server 2.4.50 版本中对 CVE-2021-41773 的修复不够充分。攻击者可以使用路径遍历攻击将 URL 映射到由类似别名的指令配置的目录之外的文件。如果这些目录之外的文件不受通常的默认配置“要求全部拒绝”的保护，则这些请求可能会成功。如果还为这些别
公开利用映射 6
Metasploit · 2
apache_normalize_path_rce.rb#CVE-2021-42013 [exploit]
apache_normalize_path.rb#CVE-2021-42013 [auxiliary]
Nuclei · 1
CVE-2021-42013.yaml [template]
已观察到在野利用
cisa_kev · confirmed
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一、 漏洞 CVE-2021-42013 基础信息
漏洞信息
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Vulnerability Title
Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
来源: CVE Program / CVE List V5
Vulnerability Description
It was found that the fix for CVE-2021-41773 in Apache HTTP Server 2.4.50 was insufficient. An attacker could use a path traversal attack to map URLs to files outside the directories configured by Alias-like directives. If files outside of these directories are not protected by the usual default configuration "require all denied", these requests can succeed. If CGI scripts are also enabled for these aliased pathes, this could allow for remote code execution. This issue only affects Apache 2.4.49 and Apache 2.4.50 and not earlier versions.
来源: CVE Program / CVE List V5
CVSS Information
N/A
来源: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
来源: CVE Program / CVE List V5
Vulnerability Title
Apache HTTP Server 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
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 存在安全漏洞，该漏洞源于发现 Apache HTTP Server 2.4.50 版本中对 CVE-2021-41773 的修复不够充分。攻击者可以使用路径遍历攻击将 URL 映射到由类似别名的指令配置的目录之外的文件。如果这些目录之外的文件不受通常的默认配置“要求全部拒绝”的保护，则这些请求可能会成功。如果还为这些别
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server | Apache HTTP Server 2.4.49 | - |
|
二、漏洞 CVE-2021-42013 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|---|---|---|
| 1 | Exploit with integrated shodan search | https://github.com/andrea-mattioli/apache-exploit-CVE-2021-42013 | POC详情 |
| 2 | Apache 2.4.50 Path traversal vulnerability | https://github.com/Vulnmachines/cve-2021-42013 | POC详情 |
| 3 | Docker container lab to play/learn with CVE-2021-42013 | https://github.com/twseptian/cve-2021-42013-docker-lab | POC详情 |
| 4 | None | https://github.com/LayarKacaSiber/CVE-2021-42013 | POC详情 |
| 5 | Poc CVE-2021-42013 - Apache 2.4.50 without CGI | https://github.com/TheLastVvV/CVE-2021-42013 | POC详情 |
| 6 | PoC CVE-2021-42013 reverse shell Apache 2.4.50 with CGI | https://github.com/TheLastVvV/CVE-2021-42013_Reverse-Shell | POC详情 |
| 7 | cve-2021-42013.py is a python script that will help in finding Path Traversal or Remote Code Execution vulnerability in Apache 2.4.50 | https://github.com/walnutsecurity/cve-2021-42013 | POC详情 |
| 8 | Exploit Apache 2.4.50(CVE-2021-42013) | https://github.com/robotsense1337/CVE-2021-42013 | POC详情 |
| 9 | None | https://github.com/xMohamed0/CVE-2021-42013-ApacheRCE | POC详情 |
| 10 | Apache 远程代码执行 （CVE-2021-42013）批量检测工具：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，发现 Apache HTTP Server 2.4.50 中针对 CVE-2021-41773 的修复不够充分。攻击者可以使用路径遍历攻击将 URL 映射到由类似别名的指令配置的目录之外的文件。如果这些目录之外的文件不受通常的默认配置“要求全部拒绝”的保护，则这些请求可能会成功。如果还为这些别名路径启用了 CGI 脚本，则这可能允许远程代码执行。此问题仅影响 Apache 2.4.49 和 Apache 2.4.50，而不影响更早版本。 | https://github.com/asaotomo/CVE-2021-42013-Apache-RCE-Poc-Exp | POC详情 |
| 11 | CVE-2021-42013-exp | https://github.com/rnsss/CVE-2021-42013 | POC详情 |
| 12 | Apache HTTP Server 2.4.50 - RCE Lab | https://github.com/jas9reet/CVE-2021-42013-LAB | POC详情 |
| 13 | These Nmap, Python and Ruby scripts detects and exploits CVE-2021-42013 with RCE and local file disclosure. | https://github.com/mauricelambert/CVE-2021-42013 | POC详情 |
| 14 | None | https://github.com/honypot/CVE-2021-42013 | POC详情 |
| 15 | None | https://github.com/Adashz/CVE-2021-42013 | POC详情 |
| 16 | CVE-2021-42013 - Apache 2.4.50 | https://github.com/hadrian3689/apache_2.4.50 | POC详情 |
| 17 | Exploit for Apache 2.4.50 (CVE-2021-42013) | https://github.com/viliuspovilaika/cve-2021-42013 | POC详情 |
| 18 | Apache 2.4.49-50 Remote Code Execution Exploit | https://github.com/theykillmeslowly/CVE-2021-42013 | POC详情 |
| 19 | None | https://github.com/mightysai1997/cve-2021-42013 | POC详情 |
| 20 | None | https://github.com/mightysai1997/cve-2021-42013L | POC详情 |
| 21 | None | https://github.com/mightysai1997/cve-2021-42013.get | POC详情 |
| 22 | Vulnerable configuration Apache HTTP Server version 2.4.49/2.4.50 | https://github.com/12345qwert123456/CVE-2021-42013 | POC详情 |
| 23 | CVE: 2021-42013 Tested on: 2.4.49 and 2.4.50 Description: Path Traversal or Remote Code Execution vulnerabilities in Apache 2.4.49 and 2.4.50 | https://github.com/cybfar/cve-2021-42013-httpd | POC详情 |
| 24 | Exploring CVE-2021-42013, using Suricata and OpenVAS to gather info | https://github.com/vudala/CVE-2021-42013 | POC详情 |
| 25 | Apache 2.4.50 Automated Remote Code Execution and Path traversal | https://github.com/birdlinux/CVE-2021-42013 | POC详情 |
| 26 | None | https://github.com/Hamesawian/CVE-2021-42013 | POC详情 |
| 27 | A PoC exploit for CVE-2021-42013 - Apache 2.4.49 & 2.4.50 Remote Code Execution | https://github.com/K3ysTr0K3R/CVE-2021-42013-EXPLOIT | POC详情 |
| 28 | Apache 2.4.50 - Path Traversal or Remote Code Execution | https://github.com/Rubikcuv5/cve-2021-42013 | POC详情 |
| 29 | None | https://github.com/imhunterand/CVE-2021-42013 | POC详情 |
| 30 | CVE-2021-42013 Vulnerability Scanner This Python script checks for the Remote Code Execution (RCE) vulnerability (CVE-2021-42013) in Apache 2.4.50. | https://github.com/BassoNicolas/CVE-2021-42013 | POC详情 |
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CVE-2021-42013 厂商安全公告 (7)
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https://www.oracle.com/security-alerts/cpujan2022.html x_refsource_MISC
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https://www.oracle.com/security-alerts/cpuapr2022.html x_refsource_MISC
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https://security.netapp.com/advisory/ntap-20211029-0009/ x_refsource_CONFIRM
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🔗 Apache HTTPD: Multiple Vulnerabilities (GLSA 202208-20) — Gentoo security 查看完整文章 vendor-advisory x_refsource_GENTOO
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https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-pathtrv-LAzg68cZ vendor-advisory x_refsource_CISCO
CVE-2021-42013 公开利用代码 (6)
CVE-2021-42013 邮件列表归档 (14)
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https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WS5RVHOIIRECG65ZBTZY7IEJVWQSQPG3/ vendor-advisory x_refsource_FEDORA
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https://lists.apache.org/thread.html/r17a4c6ce9aff662efd9459e9d1850ab4a611cb23392fc68264c72cb3%40%3Ccvs.httpd.apache.org%3E mailing-list x_refsource_MLIST
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https://lists.apache.org/thread.html/r7c795cd45a3384d4d27e57618a215b0ed19cb6ca8eb070061ad5d837%40%3Cannounce.apache.org%3E mailing-list x_refsource_MLIST
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CVE-2021-42013 其他参考 (1)
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https://www.povilaika.com/apache-2-4-50-exploit/ x_refsource_MISC
同批安全公告 · Apache Software Foundation · 2021-10-07 · 共 3 条
| CVE-2021-28129 | Apache OpenOffice 安全漏洞 | |
| CVE-2021-40439 | Apache OpenOffice 代码问题漏洞 |
IV. Related Vulnerabilities
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