Finding Apache HTTP Server instances
Update: The 2.4.50 fix was incomplete and we strongly recommend upgrading to 2.4.51 or newer.
The Apache Software Foundation recently announced a path traversal vulnerability present in version 2.4.49 of the Apache HTTP Server software. Due to insufficient coverage of potential path traversal characters in the URL, an unauthenticated attacker can read files outside of the document root and even execute system commands in some configurations. While this vulnerability (CVE-2021-41773) only affects version 2.4.49 (and 2.4.50 as a variant), it was exploited in the wild to Apache publishing their security advisory.
product:"apache httpd" AND protocol:http AND (http.head.server:"Apache/2.4.49" OR http.head.server:"Apache/2.4.50")
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September 30, 2021
Fingerprinting Windows build numbers
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