:: Deepquest ::

GNU inetutils versions 1.9.4 and below are vulnerable to a stack overflow vulnerability in the client-side environment variable handling which can be exploited to escape restricted shells on embedded devices. Most modern browsers no longer support telnet:// handlers, but in instances where URI handlers are enabled to the inetutils telnet client this issue maybe remotely triggerable. A stack-based overflow is present in the handling of environment variables when connecting telnet.c to remote telnet servers through oversized DISPLAY arguments. A heap-overflow is also present which can be triggered in a different code path due to supplying oversized environment variables during client connection code.