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Vulnerability DatabaseCVE-2021-34798

CVE-2021-34798: 
Apache HTTP Server vulnerability analysis and mitigation

Overview

CVE-2021-34798 affects Apache HTTP Server versions 2.4.48 and earlier. The vulnerability was discovered where malformed requests may cause the server to dereference a NULL pointer (NVD, Apache Advisory).

Technical details

The vulnerability has a CVSS v3.1 Base Score of 7.5 (HIGH) with vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. It is classified as a NULL Pointer Dereference vulnerability (CWE-476) that can be triggered through malformed HTTP requests (NVD).

Impact

A successful exploitation of this vulnerability could lead to a denial of service condition by causing the server process to crash when processing malformed requests (Apache Advisory).

Mitigation and workarounds

The vulnerability was fixed in Apache HTTP Server version 2.4.49. Users should upgrade to this version or later to address the issue. The fix was included in various Linux distribution security updates including Debian DSA-4982-1 and Fedora updates (Debian Advisory, Fedora Update).

Additional resources

Source: This report was generated using AI

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