Add security-check.awk, a more efficient implementation of the ports

system's security checking algorithm.  This will be used in the upcoming
changes to bsd.*.mk.

PR:		55331
Submitted by:	Eugene M. Kim <ab@astralblue.com>

1 files changed, 100 insertions, 0 deletions

diff --git a/Tools/scripts/security-check.awk b/Tools/scripts/security-check.awk
new file mode 100644
index 0000000..48746cd
--- /dev/null
+++ b/Tools/scripts/security-check.awk
@@ -0,0 +1,100 @@
+BEGIN {
+	file = "";
+	if (audit != "")
+		stupid_functions_regexp="^(gets|mktemp|tempnam|tmpnam|strcpy|strcat|sprintf)$";
+	else
+		stupid_functions_regexp="^(gets|mktemp|tempnam|tmpnam)$";
+	split("", stupid_binaries);
+	split("", network_binaries);
+	split("", setuid_binaries);
+	split("", writable_files);
+	split("", startup_scripts);
+	header_printed = 0;
+}
+FILENAME ~ /\.flattened$/ {
+	if ($0 ~ /(^|\/)etc\/rc\.d\//)
+		startup_scripts[$0] = 1;
+}
+FILENAME ~ /\.objdump$/ {
+	if (match($0, /: +file format [^ ]+$/)) {
+		file = substr($0, 1, RSTART - 1);
+		stupid_functions = "";
+		next;
+	}
+	if (file == "")
+		next;
+	if ($3 ~ /^(gets|mktemp|tempnam|tmpnam)$/ ||
+	  ($3 ~ /^(strcpy|strcat|sprintf)$/ && audit != ""))
+		stupid_binaries[file] = stupid_binaries[file] " " $3;
+	if ($3 ~ /^(accept|recvfrom)$/)
+		network_binaries[file] = 1;
+}
+FILENAME ~ /\.setuid$/ { setuid_binaries[$0] = 1; }
+FILENAME ~ /\.writable$/ { writable_files[$0] = 1; }
+function print_header() {
+	if (header_printed)
+		return;
+	if (audit != "")
+		print "===> SECURITY REPORT (PARANOID MODE): ";
+	else
+		print "===> SECURITY REPORT: ";
+	header_printed = 1;
+}
+function note_for_the_stupid(file) { return (file in stupid_binaries) ? (" (USES POSSIBLY INSECURE FUNCTIONS:" stupid_binaries[file] ")") : ""; }
+END {
+	note_printed = 0;
+	for (file in setuid_binaries) {
+		if (!note_printed) {
+			print_header();
+			print "      This port has installed the following binaries which execute with";
+			print "      increased privileges.";
+			note_printed = 1;
+		}
+		print file note_for_the_stupid(file);
+	}
+	if (note_printed)
+		print "";
+	note_printed = 0;
+	for (file in network_binaries) {
+		if (!note_printed) {
+			print_header();
+			print "      This port has installed the following files which may act as network";
+			print "      servers and may therefore pose a remote security risk to the system.";
+			note_printed = 1;
+		}
+		print file note_for_the_stupid(file);
+	}
+	if (note_printed) {
+		print "";
+		note_printed = 0;
+		for (file in startup_scripts) {
+			if (!note_printed) {
+				print_header();
+				print "      This port has installed the following startup scripts which may cause";
+				print "      these network services to be started at boot time.";
+				note_printed = 1;
+			}
+			print file;
+		}
+		if (note_printed)
+			print "";
+	}
+	note_printed = 0;
+	for (file in writable_files) {
+		if (!note_printed) {
+			print_header();
+			print "      This port has installed the following world-writable files/directories.";
+			note_printed = 1;
+		}
+		print file;
+	}
+	if (note_printed)
+		print "";
+	if (header_printed) {
+		print "      If there are vulnerabilities in these programs there may be a security";
+		print "      risk to the system. FreeBSD makes no guarantee about the security of";
+		print "      ports included in the Ports Collection. Please type 'make deinstall'";
+		print "      to deinstall the port if this is a concern.";
+	}
+	exit header_printed;
+}