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CVE-2021-42013

PUBLISHED 21.10.2025

CNA: apache

Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)

Обновлено: 14.08.2022
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.

CWE

Идентификатор Описание
CWE-22 Некорректные ограничения путей для каталогов (выход за пределы каталога)

БДУ ФСТЭК

Идентификатор Описание
BDU:2021-04904 Уязвимость веб-сервера Apache HTTP Server, связанная с недостатками проверки пути к каталогам, позволяющая нарушителю выполнить произвольный код

Доп. Информация

Product Status

Apache HTTP Server
Product: Apache HTTP Server
Vendor: Apache Software Foundation
Default status: Не определен
Версии:
Затронутые версии Статус
Наблюдалось в версии Apache HTTP Server 2.4.49 affected
Наблюдалось в версии Apache HTTP Server 2.4.50 affected
 

Ссылки

https://httpd.apache.org/security/vulnerabilities_24.html
https://lists.apache.org/thread.html/r7c795cd45a3384d4d27e57618a215b0ed19cb6ca8eb070061ad5d837%40%3Cannounce.apache.org%...
https://lists.apache.org/thread.html/rb5b0e46f179f60b0c70204656bc52fcb558e961cb4d06a971e9e3efb%40%3Cusers.httpd.apache.o...
http://www.openwall.com/lists/oss-security/2021/10/07/6
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-pathtrv-LAzg68cZ
http://jvn.jp/en/jp/JVN51106450/index.html
http://www.openwall.com/lists/oss-security/2021/10/08/1
https://lists.apache.org/thread.html/r17a4c6ce9aff662efd9459e9d1850ab4a611cb23392fc68264c72cb3%40%3Ccvs.httpd.apache.org...
http://www.openwall.com/lists/oss-security/2021/10/08/2
http://www.openwall.com/lists/oss-security/2021/10/08/3
http://www.openwall.com/lists/oss-security/2021/10/08/4
http://www.openwall.com/lists/oss-security/2021/10/08/6
http://www.openwall.com/lists/oss-security/2021/10/08/5
http://www.openwall.com/lists/oss-security/2021/10/09/1
http://www.openwall.com/lists/oss-security/2021/10/11/4
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RMIIEFINL6FUIOPD2A3M5XC...
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WS5RVHOIIRECG65ZBTZY7IE...
http://www.openwall.com/lists/oss-security/2021/10/15/3
http://www.openwall.com/lists/oss-security/2021/10/16/1
https://www.oracle.com/security-alerts/cpujan2022.html
https://security.netapp.com/advisory/ntap-20211029-0009/
http://packetstormsecurity.com/files/164629/Apache-2.4.49-2.4.50-Traversal-Remote-Code-Execution.html
http://packetstormsecurity.com/files/164941/Apache-HTTP-Server-2.4.50-Remote-Code-Execution.html
http://packetstormsecurity.com/files/164501/Apache-HTTP-Server-2.4.50-Path-Traversal-Code-Execution.html
http://packetstormsecurity.com/files/164609/Apache-HTTP-Server-2.4.50-Remote-Code-Execution.html
http://packetstormsecurity.com/files/165089/Apache-HTTP-Server-2.4.50-CVE-2021-42013-Exploitation.html
https://www.oracle.com/security-alerts/cpuapr2022.html
http://packetstormsecurity.com/files/167397/Apache-2.4.50-Remote-Code-Execution.html
https://www.povilaika.com/apache-2-4-50-exploit/
https://security.gentoo.org/glsa/202208-20

CVE Program Container

Обновлено: 04.08.2024
SSVC and KEV, plus CVSS and CWE if not provided by the CNA.

Ссылки

https://httpd.apache.org/security/vulnerabilities_24.html
https://lists.apache.org/thread.html/r7c795cd45a3384d4d27e57618a215b0ed19cb6ca8eb070061ad5d837%40%3Cannounce.apache.org%...
https://lists.apache.org/thread.html/rb5b0e46f179f60b0c70204656bc52fcb558e961cb4d06a971e9e3efb%40%3Cusers.httpd.apache.o...
http://www.openwall.com/lists/oss-security/2021/10/07/6
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-pathtrv-LAzg68cZ
http://jvn.jp/en/jp/JVN51106450/index.html
http://www.openwall.com/lists/oss-security/2021/10/08/1
https://lists.apache.org/thread.html/r17a4c6ce9aff662efd9459e9d1850ab4a611cb23392fc68264c72cb3%40%3Ccvs.httpd.apache.org...
http://www.openwall.com/lists/oss-security/2021/10/08/2
http://www.openwall.com/lists/oss-security/2021/10/08/3
http://www.openwall.com/lists/oss-security/2021/10/08/4
http://www.openwall.com/lists/oss-security/2021/10/08/6
http://www.openwall.com/lists/oss-security/2021/10/08/5
http://www.openwall.com/lists/oss-security/2021/10/09/1
http://www.openwall.com/lists/oss-security/2021/10/11/4
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RMIIEFINL6FUIOPD2A3M5XC...
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WS5RVHOIIRECG65ZBTZY7IE...
http://www.openwall.com/lists/oss-security/2021/10/15/3
http://www.openwall.com/lists/oss-security/2021/10/16/1
https://www.oracle.com/security-alerts/cpujan2022.html
https://security.netapp.com/advisory/ntap-20211029-0009/
http://packetstormsecurity.com/files/164629/Apache-2.4.49-2.4.50-Traversal-Remote-Code-Execution.html
http://packetstormsecurity.com/files/164941/Apache-HTTP-Server-2.4.50-Remote-Code-Execution.html
http://packetstormsecurity.com/files/164501/Apache-HTTP-Server-2.4.50-Path-Traversal-Code-Execution.html
http://packetstormsecurity.com/files/164609/Apache-HTTP-Server-2.4.50-Remote-Code-Execution.html
http://packetstormsecurity.com/files/165089/Apache-HTTP-Server-2.4.50-CVE-2021-42013-Exploitation.html
https://www.oracle.com/security-alerts/cpuapr2022.html
http://packetstormsecurity.com/files/167397/Apache-2.4.50-Remote-Code-Execution.html
https://www.povilaika.com/apache-2-4-50-exploit/
https://security.gentoo.org/glsa/202208-20

CISA ADP Vulnrichment

Обновлено: 21.10.2025
Этот блок содержит дополнительную информацию, предоставленную программой CVE для этой уязвимости.

CVSS

Оценка Severity Версия Базовый вектор
9.8 CRITICAL 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation Automatable Technical Impact Версия Дата доступа
active yes total 2.0.3 04.02.2025

Ссылки

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