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Re: EFC Released
From: Matthias Stiller <matthias () stiller-office com>
Date: Fri, 05 Mar 2004 21:07:29 +0100

Balwinder Singh wrote:
Dear All,

Execution Flow Control (EFC) is available for download at

What is EFC?

EFC monitors the execution of a program by observing system calls made
by the program. EFC generates a database for each program describing its behavioral model. The moment request for execution of a program is
made, kernel also loads program's behavioral model into the memory.
Each request by a program is compared with model data base, if request
agrees with model it is permitted else program is killed.
EFC is a kernel module, and woks on Linux only.



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Hi Bal,

Although I appriciate ideas to enhance security concerning buffer overflows or format string bugs, i cannot understand why to find
the following lines in etc_db_new.c including your package:

char pwd[MAX_PATH_LEN];
i = 0;
while((ch = fgetc(strace_file)) != '\0') {
  pwd[i] = ch;
Haven't found any made borders. And yes, due to its permissions it won't let people become root ... it is just a cosmetic failure. (hopefully) :)

Moreover, and that is the actual reason for replying your mail ...
I couldn't find the patch in $EFC_PATH/efc/ ... did I just download a non complete package?

Matthias Stiller


Full-Disclosure - We believe in it.
Charter: http://lists.netsys.com/full-disclosure-charter.html

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