CVE-2024-42516: 
Apache HTTP Server vulnerability analysis and mitigation

HTTP response splitting vulnerability (CVE-2024-42516) affects the core of Apache HTTP Server from versions 2.4.0 through 2.4.63. The vulnerability allows an attacker who can manipulate the Content-Type response headers of applications hosted or proxied by the server to split the HTTP response. This issue was previously identified as CVE-2023-38709, but the patch included in Apache HTTP Server 2.4.59 did not completely address the vulnerability (Apache Security, NVD).

The vulnerability has been assigned a CVSS v3.1 Base Score of 7.5 (HIGH) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N. The issue stems from improper validation of Content-Type response headers in the core server component, which can lead to HTTP response splitting attacks. The vulnerability has been classified under CWE-20 (Improper Input Validation) (NVD, CISA-ADP).

When exploited, this vulnerability allows attackers to perform HTTP response splitting attacks, which can lead to various security issues including response header injection, cache poisoning, and cross-site scripting (XSS). The high integrity impact rating indicates that the vulnerability can significantly affect the trustworthiness and reliability of the affected systems (Ubuntu Security).

Users are strongly recommended to upgrade to Apache HTTP Server version 2.4.64, which contains the complete fix for this vulnerability. The issue affects all versions from 2.4.0 through 2.4.63. No alternative workarounds have been provided by the vendor (Apache Security).