A NULL pointer dereference in mod_dav_lock in Apache HTTP Server 2.4.66 and earlier may allow an attacker to crash the server with a malicious request.mod_dav_lock is not used internally by mod_dav or mod_dav_fs.
The only known use-case for mod_dav_lock was mod_dav_svn from Apache Subversion earlier than version 1.2.0.
Users are recommended to upgrade to version 2.4.66, which fixes this issue, or remove mod_dav_lock.
Weakness
The product dereferences a pointer that it expects to be valid but is NULL.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Http_server | Apache | * | 2.4.67 (excluding) |
| JBoss Core Services for RHEL 8 | RedHat | jbcs-httpd24-httpd-0:2.4.62-13.el8jbcs | * |
| JBoss Core Services on RHEL 7 | RedHat | jbcs-httpd24-httpd-0:2.4.62-13.el7jbcs | * |
| Red Hat Enterprise Linux 10 | RedHat | httpd-0:2.4.63-13.el10_2.4 | * |
| Red Hat JBoss Core Services 2.4.62.SP4 | RedHat | mod_dav_lock.so | * |
| Red Hat Hardened Images | RedHat | httpd-main-2.4.67-1.hum1 | * |
| Apache2 | Ubuntu | devel | * |
| Apache2 | Ubuntu | esm-infra-legacy/trusty | * |
| Apache2 | Ubuntu | esm-infra-legacy/xenial | * |
| Apache2 | Ubuntu | esm-infra/bionic | * |
| Apache2 | Ubuntu | esm-infra/focal | * |
| Apache2 | Ubuntu | esm-infra/xenial | * |
| Apache2 | Ubuntu | jammy | * |
| Apache2 | Ubuntu | noble | * |
| Apache2 | Ubuntu | questing | * |
| Apache2 | Ubuntu | resolute | * |
| Apache2 | Ubuntu | upstream | * |