Description
An attacker, opening a HTTP/2 connection with an initial window size of 0, was able to block handling of that connection indefinitely in Apache HTTP Server. This could be used to exhaust worker resources in the server, similar to the well known "slow loris" attack pattern. This has been fixed in version 2.4.58, so that such connection are terminated properly after the configured connection timeout. This issue affects Apache HTTP Server: from 2.4.55 through 2.4.57. Users are recommended to upgrade to version 2.4.58, which fixes the issue.
Remediation
References
Related Vulnerabilities
PHP Numeric Errors Vulnerability (CVE-2007-1001)
WordPress Plugin Import all XML, CSV & TXT into WordPress Server-Side Request Forgery (6.5.2)
Jboss EAP Incorrect Authorization Vulnerability (CVE-2026-3009)
WordPress Permissions, Privileges, and Access Controls Vulnerability (CVE-2012-3385)
WordPress 'cat' Parameter SQL Injection Vulnerability (1.5 - 1.5.1.1)