CVE-2021-41773— Apache HTTP Server 路径遍历漏洞
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 2.4.49版本存在路径遍历漏洞，攻击者可利用该漏洞使用路径遍历攻击将URL映射到预期文档根以外的文件。
公开利用映射 5
Metasploit · 2
apache_normalize_path_rce.rb#CVE-2021-41773 [exploit]
apache_normalize_path.rb#CVE-2021-41773 [auxiliary]
Nuclei · 1
CVE-2021-41773.yaml [template]
已观察到在野利用
github_trending · low
cisa_kev · confirmed
可能的 ATT&CK 技术 1 AI
T1190 · Exploit Public-Facing Application
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一、 漏洞 CVE-2021-41773 基础信息
漏洞信息
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Vulnerability Title
Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49
来源: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in a change made to path normalization in Apache HTTP Server 2.4.49. 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 is known to be exploited in the wild. This issue only affects Apache 2.4.49 and not earlier versions. The fix in Apache HTTP Server 2.4.50 was found to be incomplete, see CVE-2021-42013.
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 路径遍历漏洞
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 2.4.49版本存在路径遍历漏洞，攻击者可利用该漏洞使用路径遍历攻击将URL映射到预期文档根以外的文件。
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 2.4.49 | - |
|
二、漏洞 CVE-2021-41773 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|---|---|---|
| 1 | CVE-2021-41773 Path Traversal vulnerability in Apache 2.4.49. | https://github.com/Vulnmachines/cve-2021-41773 | POC详情 |
| 2 | CVE-2021-41773 | https://github.com/numanturle/CVE-2021-41773 | POC详情 |
| 3 | Path traversal in Apache HTTP Server 2.4.49 (CVE-2021-41773) | https://github.com/knqyf263/CVE-2021-41773 | POC详情 |
| 4 | None | https://github.com/ZephrFish/CVE-2021-41773-PoC | POC详情 |
| 5 | None | https://github.com/iilegacyyii/PoC-CVE-2021-41773 | POC详情 |
| 6 | None | https://github.com/masahiro331/CVE-2021-41773 | POC详情 |
| 7 | Exploitation of CVE-2021-41773 a Directory Traversal in Apache 2.4.49. | https://github.com/j4k0m/CVE-2021-41773 | POC详情 |
| 8 | Poc.py | https://github.com/TishcaTpx/POC-CVE-2021-41773 | POC详情 |
| 9 | None | https://github.com/lorddemon/CVE-2021-41773-PoC | POC详情 |
| 10 | Apache HTTP Server 2.4.49, 2.4.50 - Path Traversal & RCE | https://github.com/Ls4ss/CVE-2021-41773_CVE-2021-42013 | POC详情 |
| 11 | CVE-2021-41773 POC with Docker | https://github.com/itsecurityco/CVE-2021-41773 | POC详情 |
| 12 | PoC for CVE-2021-41773 with docker to demonstrate | https://github.com/habibiefaried/CVE-2021-41773-PoC | POC详情 |
| 13 | CVE-2021-41773 | https://github.com/creadpag/CVE-2021-41773-POC | POC详情 |
| 14 | CVE-2021-41773.nse | https://github.com/TAI-REx/cve-2021-41773-nse | POC详情 |
| 15 | CVE-2021-41773 playground | https://github.com/blasty/CVE-2021-41773 | POC详情 |
| 16 | Path Traversal vulnerability in Apache 2.4.49 | https://github.com/PentesterGuruji/CVE-2021-41773 | POC详情 |
| 17 | Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49 (CVE-2021-41773) | https://github.com/jbovet/CVE-2021-41773 | POC详情 |
| 18 | None | https://github.com/mohwahyudi/cve-2021-41773 | POC详情 |
| 19 | CVE-2021-41773 的复现 | https://github.com/1nhann/CVE-2021-41773 | POC详情 |
| 20 | None | https://github.com/ranggaggngntt/CVE-2021-41773 | POC详情 |
| 21 | Vulnerable docker images for CVE-2021-41773 | https://github.com/BlueTeamSteve/CVE-2021-41773 | POC详情 |
| 22 | Metasploit-Framework modules (scanner and exploit) for the CVE-2021-41773 and CVE-2021-42013 (Path Traversal in Apache 2.4.49/2.4.50) | https://github.com/Zeop-CyberSec/apache_normalize_path | POC详情 |
| 23 | None | https://github.com/r00tVen0m/CVE-2021-41773 | POC详情 |
| 24 | exploit to CVE-2021-41773 | https://github.com/n3k00n3/CVE-2021-41773 | POC详情 |
| 25 | None | https://github.com/fnatalucci/CVE-2021-41773-RCE | POC详情 |
| 26 | Apache 2.4.49 | https://github.com/AssassinUKG/CVE-2021-41773 | POC详情 |
| 27 | Simple script realizado en bash, para revisión de múltiples hosts para CVE-2021-41773 (Apache) | https://github.com/jheeree/Simple-CVE-2021-41773-checker | POC详情 |
| 28 | Apache HTTPd (2.4.49) – Local File Disclosure (LFI) | https://github.com/orangmuda/CVE-2021-41773 | POC详情 |
| 29 | A framework for bug hunting or pentesting targeting websites that have CVE-2021-41773 Vulnerability in public | https://github.com/HightechSec/scarce-apache2 | POC详情 |
| 30 | CVE-2021-41773, poc, exploit | https://github.com/vinhjaxt/CVE-2021-41773-exploit | POC详情 |
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CVE-2021-41773 厂商安全公告 (5)
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https://www.oracle.com/security-alerts/cpujan2022.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-2021-41773 公开利用代码 (4)
CVE-2021-41773 邮件列表归档 (17)
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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/r98d704ed4377ed889d40479db79ed1ee2f43b2ebdd79ce84b042df45%40%3Cannounce.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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IV. Related Vulnerabilities
V. Comments for CVE-2021-41773
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