crítica
CVE-2021-41773
httpd: path traversal and file disclosure vulnerability
En la Trivy database desde, como mínimo, el 24 oct 2026, 07:11 UTCNo consta cuándo entró antes de ese build.
Severidad por fuente
NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Bitnami9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
La etiqueta propia de Trivy es CRITICAL. Crítica según NVD, Bitnami, Photon OS. Más baja según Red Hat (alta), Amazon (alta), CBL-Mariner (alta).
Descripción
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.
Paquetes afectados y versiones corregidas
| Fuente | Paquete | Corregido en |
|---|---|---|
| bitnami::Bitnami Vulnerability Database | apache | 2.4.50 |
| Photon OS 4.0 | httpd, httpd-devel, httpd-docs y 1 más | 2.4.51-1.ph4 |
| alpine 3.11 | apache2 | 2.4.50-r0 |
| alpine 3.12 | apache2 | 2.4.50-r0 |
| alpine 3.13 | apache2 | 2.4.50-r0 |
| alpine 3.14 | apache2 | 2.4.50-r0 |
| alpine 3.15 | apache2 | 2.4.50-r0 |
| alpine 3.16 | apache2 | 2.4.50-r0 |
| alpine 3.17 | apache2 | 2.4.50-r0 |
| alpine 3.18 | apache2 | 2.4.50-r0 |
| alpine 3.19 | apache2 | 2.4.50-r0 |
| alpine 3.20 | apache2 | 2.4.50-r0 |
Mostrar las 48 entradas de 26 fuentes
| Fuente | Paquete | Corregido en |
|---|---|---|
| bitnami::Bitnami Vulnerability Database | apache | 2.4.50 |
| Photon OS 4.0 | httpd | 2.4.51-1.ph4 |
| Photon OS 4.0 | httpd-devel | 2.4.51-1.ph4 |
| Photon OS 4.0 | httpd-docs | 2.4.51-1.ph4 |
| Photon OS 4.0 | httpd-tools | 2.4.51-1.ph4 |
| alpine 3.11 | apache2 | 2.4.50-r0 |
| alpine 3.12 | apache2 | 2.4.50-r0 |
| alpine 3.13 | apache2 | 2.4.50-r0 |
| alpine 3.14 | apache2 | 2.4.50-r0 |
| alpine 3.15 | apache2 | 2.4.50-r0 |
| alpine 3.16 | apache2 | 2.4.50-r0 |
| alpine 3.17 | apache2 | 2.4.50-r0 |
| alpine 3.18 | apache2 | 2.4.50-r0 |
| alpine 3.19 | apache2 | 2.4.50-r0 |
| alpine 3.20 | apache2 | 2.4.50-r0 |
| alpine 3.21 | apache2 | 2.4.50-r0 |
| alpine 3.22 | apache2 | 2.4.50-r0 |
| alpine 3.23 | apache2 | 2.4.50-r0 |
| alpine 3.24 | apache2 | 2.4.50-r0 |
| alpine edge | apache2 | 2.4.50-r0 |
| amazon linux 1 | httpd24 | 2.4.51-1.94.amzn1 |
| amazon linux 1 | httpd24-debuginfo | 2.4.51-1.94.amzn1 |
| amazon linux 1 | httpd24-devel | 2.4.51-1.94.amzn1 |
| amazon linux 1 | httpd24-manual | 2.4.51-1.94.amzn1 |
| amazon linux 1 | httpd24-tools | 2.4.51-1.94.amzn1 |
| amazon linux 1 | mod24_ldap | 2.4.51-1.94.amzn1 |
| amazon linux 1 | mod24_md | 2.4.51-1.94.amzn1 |
| amazon linux 1 | mod24_proxy_html | 1:2.4.51-1.94.amzn1 |
| amazon linux 1 | mod24_session | 2.4.51-1.94.amzn1 |
| amazon linux 1 | mod24_ssl | 1:2.4.51-1.94.amzn1 |
| amazon linux 2 | httpd | 2.4.51-1.amzn2 |
| amazon linux 2 | httpd-debuginfo | 2.4.51-1.amzn2 |
| amazon linux 2 | httpd-devel | 2.4.51-1.amzn2 |
| amazon linux 2 | httpd-filesystem | 2.4.51-1.amzn2 |
| amazon linux 2 | httpd-manual | 2.4.51-1.amzn2 |
| amazon linux 2 | httpd-tools | 2.4.51-1.amzn2 |
| amazon linux 2 | mod_ldap | 2.4.51-1.amzn2 |
| amazon linux 2 | mod_md | 2.4.51-1.amzn2 |
| amazon linux 2 | mod_proxy_html | 1:2.4.51-1.amzn2 |
| amazon linux 2 | mod_session | 2.4.51-1.amzn2 |
| amazon linux 2 | mod_ssl | 1:2.4.51-1.amzn2 |
| CBL-Mariner 1.0 | httpd | 0:2.4.51-1.cm1 |
| debian 12 | apache2 | 2.4.50-1 |
| debian 13 | apache2 | 2.4.50-1 |
| debian 14 | apache2 | 2.4.50-1 |
| echo | apache2 | 2.4.50-1 |
| root.io debian 12 | rootio-apache2 | 2.4.50-1 |
| root.io debian 13 | rootio-apache2 | 2.4.50-1 |
Referencias
- http://packetstormsecurity.com/files/164418/Apache-HTTP-Server-2.4.49-Path-Traversal-Remote-Code-Execution.html
- http://packetstormsecurity.com/files/164418/Apache-HTTP-Server-2.4.49-Path-Traversal.html
- 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://www.openwall.com/lists/oss-security/2021/10/05/2
- http://www.openwall.com/lists/oss-security/2021/10/07/1
- http://www.openwall.com/lists/oss-security/2021/10/07/6
- http://www.openwall.com/lists/oss-security/2021/10/08/1
Las 34 referencias
- 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/2021/10/08/5
- http://www.openwall.com/lists/oss-security/2021/10/08/6
- http://www.openwall.com/lists/oss-security/2021/10/09/1
- http://www.openwall.com/lists/oss-security/2021/10/11/4
- http://www.openwall.com/lists/oss-security/2021/10/15/3
- http://www.openwall.com/lists/oss-security/2021/10/16/1
- https://access.redhat.com/security/cve/CVE-2021-41773
- https://httpd.apache.org/security/vulnerabilities_24.html
- https://lists.apache.org/thread.html/r17a4c6ce9aff662efd9459e9d1850ab4a611cb23392fc68264c72cb3@%3Ccvs.httpd.apache.org%3E
- https://lists.apache.org/thread.html/r6abf5f2ba6f1aa8b1030f95367aaf17660c4e4c78cb2338aee18982f@%3Cusers.httpd.apache.org%3E
- https://lists.apache.org/thread.html/r7c795cd45a3384d4d27e57618a215b0ed19cb6ca8eb070061ad5d837@%3Cannounce.apache.org%3E
- https://lists.apache.org/thread.html/r98d704ed4377ed889d40479db79ed1ee2f43b2ebdd79ce84b042df45@%3Cannounce.apache.org%3E
- https://lists.apache.org/thread.html/rb5b0e46f179f60b0c70204656bc52fcb558e961cb4d06a971e9e3efb@%3Cusers.httpd.apache.org%3E
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RMIIEFINL6FUIOPD2A3M5XC6DH45Y3CC/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WS5RVHOIIRECG65ZBTZY7IEJVWQSQPG3/
- https://nvd.nist.gov/vuln/detail/CVE-2021-41773
- https://security.gentoo.org/glsa/202208-20
- https://security.netapp.com/advisory/ntap-20211029-0009/
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-pathtrv-LAzg68cZ
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-41773
- https://www.cve.org/CVERecord?id=CVE-2021-41773
- https://www.oracle.com/security-alerts/cpujan2022.html