CVE-2017-7668: Apache HTTP Server

High severity, CVSS 7.5. EPSS: 57.5% chance of exploitation in the next 30 days.

The HTTP strict parsing changes added in Apache httpd 2.2.32 and 2.4.24 introduced a bug in token list parsing, which allows ap_find_token() to search past the end of its input string. By maliciously crafting a sequence of request headers, an attacker may be able to cause a segmentation fault, or to force ap_find_token() to return an incorrect value.

Affected products

• Apache HTTP Server: version 2.2.32 only; version 2.4.24 only; version 2.4.25 only
• Apple Mac OS X: before 10.13.1 (fixed in 10.13.1); from 10.11.0, before 10.11.6 (fixed in 10.11.6); from 10.12.0, before 10.12.6 (fixed in 10.12.6); version 10.11.6 only; version 10.12.6 only
• Debian Debian Linux: version 8.0 only; version 9.0 only
• Netapp Clustered Data Ontap: affected versions not specified
• Netapp Oncommand Unified Manager: affected versions not specified
• Netapp Storagegrid: affected versions not specified
• Oracle Secure Global Desktop: version 5.3 only
• Red Hat Enterprise Linux Desktop: version 7.0 only
• Red Hat Enterprise Linux Eus: version 7.2 only; version 7.3 only; version 7.4 only; version 7.5 only; version 7.6 only; version 7.7 only
• Red Hat Enterprise Linux Server: version 7.0 only
• Red Hat Enterprise Linux Server Aus: version 7.2 only; version 7.3 only; version 7.4 only; version 7.6 only; version 7.7 only
• Red Hat Enterprise Linux Server Tus: version 7.2 only; version 7.3 only; version 7.4 only; version 7.6 only; version 7.7 only
• Red Hat Enterprise Linux Workstation: version 7.0 only

Published 2017-06-20. Last modified 2026-06-17.