NULL pointer dereference in Apache HTTP Server - CVE-2017-3169
Published: June 20, 2017 / Updated: April 7, 2020
Vulnerability identifier: #VU7116
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green
CVE-ID: CVE-2017-3169
CWE-ID: CWE-592
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vendor: Apache Foundation
Affected software:
Apache HTTP Server
Apache HTTP Server
Detailed vulnerability description
The vulnerability allows a remote attacker to perform denial of service attack.
The vulnerability exists due to a NULL pointer dereference error within mod_ssl module, when third-party modules call ap_hook_process_connection() function during an HTTP request to an HTTPS port. A remote attacker can send a specially crafted HTTP request and crash the affected web server.
How to mitigate CVE-2017-3169
Update Apache HTTP server to version 2.2.34 or 2.4.26.