Finding #127 — CVE-2021-41773
| Inventory item | apache-test 2.4.37 (software, apache) |
|---|---|
| Title | Apache HTTP Server: Apache HTTP Server Path Traversal Vulnerability |
| Match | keyword / confidence low |
| Status | new |
| First seen | 2026-06-11T07:35:12Z |
| Last updated | 2026-06-11T07:35:12Z |
| CVE | CVE-2021-41773 KEV since 2021-11-03 |
| CVSS | 9.8 (CRITICAL)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 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. |
| Source advisory | Apache HTTP Server: Apache HTTP Server Path Traversal Vulnerability Apache HTTP Server contains a path traversal vulnerability that allows an attacker to perform remote code execution if files outside directories configured by Alias-like directives are not under default require all denied or if CGI scripts are enabled. This CVE ID resolves an incomplete patch for CVE-2021-41773. |
| References | 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 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 |