Software Engineering Institute

Sun Solaris 10 operating system provides a module called the SSL Kernel Proxy to improve the performance of applications that do SSL packet processing. This module contains an unspecified vulnerability that may allow an unprivileged remote attacker to act as an SSL client to cause the system to crash.

Sun states that the following versions are vulnerable:
SPARC Platform
Solaris 10 with patch 118822-29 or later and without patch 123304-01
x86 Platform
Solaris 10 with patch 118844-29 or later and without patch 118855-17

An unprivileged remote attacker may be able to cause an affected system's kernel to panic, resulting in a denial-of-service condition.

Apply an Update

Sun has published patches to address this issue. Please see Sun Security Alert 102563 for additional details.

Workaround

Sun has issued the following workaround for this vulnerability:

To workaround this issue, disable all instances of the Kernel SSL Proxy service and re-configure applications which may depend on them. Note that this will remove the benefits otherwise gained by the Kernel SSL Proxy, such as the performance enhancements.

To disable the Kernel SSL Proxy service, the svcadm(1M) command can be used for each instance of the service:

    # svcadm disable svc:/network/ssl/proxy:<instance_suffix>

To disable and delete the Kernel SSL Proxy service, the ksslcfg(1M) can be used for each instance of the service:

    # ksslcfg delete [host] <ssl_port>