A flaw was found in OpenLDAP in versions before 2.4.56. This flaw allows an attacker who sends a malicious packet processed by OpenLDAP to force a failed assertion in csnNormalize23(). The highest threat from this vulnerability is to system availability.

It is possible to remotely Segfault Apache http server with a specially crafted string sent to the modcluster via service messages (MCMP).

Only the VirtualHost explicitly enabled by an administrator to receive service messages from worker nodes (Tomcat or EAP workers). Unless the administrator made a grave mistake in opening an unsecured modcluster management VirtualHost to the Internet without any authentication, it is impossible to exploit this bug from an untrusted client.

Special set of modcluster management protocol HTTP method requests. One could pass a certain number of = symbols in sequence after a legitimate element and cause segfault.

A security flaw was found in the way init script implementation of the Tomcat service, an Apache Servlet/JSP Engine, as used in various versions of Red Hat Enterprise Linux and Fedora, performed management of Tomcat log file. A local attacker could use this flaw to cause denial of service or, potentially, execute arbitrary code with the privileges of the privileged system user (root) via symbolic link attacks on Tomcat log file.

Acknowledgements:

Red Hat would like to thank Simon Fayer of Imperial College London for reporting this issue.