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gdb/gdb-6.3-security-errata-200...

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http://sourceware.org/ml/gdb-patches/2005-05/threads.html#00637
Proposed upstream but never committed upstream.
2005-06-09 Jeff Johnston <jjohnstn@redhat.com>
* gdb.base/gdbinit.exp: New testcase.
* gdb.base/gdbinit.sample: Sample .gdbinit for gdbinit.exp.
2005-06-08 Daniel Jacobowitz <dan@codesourcery.com>
Jeff Johnston <jjohnstn@redhat.com>
* Makefile.in (cli-cmds.o): Update.
* configure.in: Add check for getuid.
* configure: Regenerated.
* config.in: Ditto.
* main.c (captured_main): Pass -1 to source_command when loading
gdbinit files.
* cli/cli-cmds.c: Include "gdb_stat.h" and <fcntl.h>.
(source_command): Update documentation. Check permissions if
FROM_TTY is -1.
Index: gdb-7.4.50.20111218/gdb/cli/cli-cmds.c
===================================================================
--- gdb-7.4.50.20111218.orig/gdb/cli/cli-cmds.c 2011-12-16 22:17:42.000000000 +0100
+++ gdb-7.4.50.20111218/gdb/cli/cli-cmds.c 2011-12-19 00:27:16.572468926 +0100
@@ -40,6 +40,7 @@
#include "source.h"
#include "disasm.h"
#include "tracepoint.h"
+#include "gdb_stat.h"
#include "ui-out.h"
@@ -485,7 +486,7 @@ show_script_ext_mode (struct ui_file *fi
int
find_and_open_script (const char *script_file, int search_path,
- FILE **streamp, char **full_pathp)
+ FILE **streamp, char **full_pathp, int from_tty)
{
char *file;
int fd;
@@ -511,6 +512,32 @@ find_and_open_script (const char *script
return 0;
}
+#ifdef HAVE_GETUID
+ if (from_tty == -1)
+ {
+ struct stat statbuf;
+
+ if (fstat (fd, &statbuf) < 0)
+ {
+ int save_errno = errno;
+
+ close (fd);
+ do_cleanups (old_cleanups);
+ errno = save_errno;
+ return 0;
+ }
+ if (statbuf.st_uid != getuid () || (statbuf.st_mode & S_IWOTH))
+ {
+ /* FILE gets freed by do_cleanups (old_cleanups). */
+ warning (_("not using untrusted file \"%s\""), file);
+ close (fd);
+ do_cleanups (old_cleanups);
+ errno = EPERM;
+ return 0;
+ }
+ }
+#endif
+
do_cleanups (old_cleanups);
*streamp = fdopen (fd, FOPEN_RT);
@@ -572,13 +599,14 @@ source_script_with_search (const char *f
if (file == NULL || *file == 0)
error (_("source command requires file name of file to source."));
- if (!find_and_open_script (file, search_path, &stream, &full_path))
+ if (!find_and_open_script (file, search_path, &stream, &full_path,
+ from_tty))
{
/* The script wasn't found, or was otherwise inaccessible.
If the source command was invoked interactively, throw an
error. Otherwise (e.g. if it was invoked by a script),
silently ignore the error. */
- if (from_tty)
+ if (from_tty > 0)
perror_with_name (file);
else
return;
Index: gdb-7.4.50.20111218/gdb/testsuite/gdb.base/gdbinit.exp
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ gdb-7.4.50.20111218/gdb/testsuite/gdb.base/gdbinit.exp 2011-12-19 00:25:26.079891954 +0100
@@ -0,0 +1,91 @@
+# Copyright 2005
+# Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+# Please email any bugs, comments, and/or additions to this file to:
+# bug-gdb@prep.ai.mit.edu
+
+# This file was written by Jeff Johnston <jjohnstn@redhat.com>.
+
+# are we on a target board
+if [is_remote target] {
+ return
+}
+
+
+global verbose
+global GDB
+global GDBFLAGS
+global gdb_prompt
+global timeout
+global gdb_spawn_id;
+
+gdb_stop_suppressing_tests;
+
+verbose "Spawning $GDB -nw"
+
+if [info exists gdb_spawn_id] {
+ return 0;
+}
+
+if ![is_remote host] {
+ if { [which $GDB] == 0 } then {
+ perror "$GDB does not exist."
+ exit 1
+ }
+}
+
+set env(HOME) [pwd]
+remote_exec build "rm .gdbinit"
+remote_exec build "cp ${srcdir}/${subdir}/gdbinit.sample .gdbinit"
+remote_exec build "chmod 646 .gdbinit"
+
+set res [remote_spawn host "$GDB -nw [host_info gdb_opts]"];
+if { $res < 0 || $res == "" } {
+ perror "Spawning $GDB failed."
+ return 1;
+}
+gdb_expect 360 {
+ -re "warning: not using untrusted file.*\.gdbinit.*\[\r\n\]$gdb_prompt $" {
+ pass "untrusted .gdbinit caught."
+ }
+ -re "$gdb_prompt $" {
+ fail "untrusted .gdbinit caught."
+ }
+ timeout {
+ fail "(timeout) untrusted .gdbinit caught."
+ }
+}
+
+remote_exec build "chmod 644 .gdbinit"
+set res [remote_spawn host "$GDB -nw [host_info gdb_opts]"];
+if { $res < 0 || $res == "" } {
+ perror "Spawning $GDB failed."
+ return 1;
+}
+gdb_expect 360 {
+ -re "warning: not using untrusted file.*\.gdbinit.*\[\r\n\]$gdb_prompt $" {
+ fail "trusted .gdbinit allowed."
+ }
+ -re "in gdbinit.*$gdb_prompt $" {
+ pass "trusted .gdbinit allowed."
+ }
+ timeout {
+ fail "(timeout) trusted .gdbinit allowed."
+ }
+}
+
+remote_exec build "rm .gdbinit"
Index: gdb-7.4.50.20111218/gdb/testsuite/gdb.base/gdbinit.sample
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ gdb-7.4.50.20111218/gdb/testsuite/gdb.base/gdbinit.sample 2011-12-19 00:25:26.079891954 +0100
@@ -0,0 +1 @@
+echo "\nin gdbinit"
Index: gdb-7.4.50.20111218/gdb/main.c
===================================================================
--- gdb-7.4.50.20111218.orig/gdb/main.c 2011-11-05 18:08:30.000000000 +0100
+++ gdb-7.4.50.20111218/gdb/main.c 2011-12-19 00:25:26.080891950 +0100
@@ -822,7 +822,7 @@ captured_main (void *data)
debugging or what directory you are in. */
if (home_gdbinit && !inhibit_gdbinit)
- catch_command_errors (source_script, home_gdbinit, 0, RETURN_MASK_ALL);
+ catch_command_errors (source_script, home_gdbinit, -1, RETURN_MASK_ALL);
/* Now perform all the actions indicated by the arguments. */
if (cdarg != NULL)
@@ -901,7 +901,7 @@ captured_main (void *data)
/* Read the .gdbinit file in the current directory, *if* it isn't
the same as the $HOME/.gdbinit file (it should exist, also). */
if (local_gdbinit && !inhibit_gdbinit)
- catch_command_errors (source_script, local_gdbinit, 0, RETURN_MASK_ALL);
+ catch_command_errors (source_script, local_gdbinit, -1, RETURN_MASK_ALL);
/* Now that all .gdbinit's have been read and all -d options have been
processed, we can read any scripts mentioned in SYMARG.
Index: gdb-7.4.50.20111218/gdb/python/py-auto-load.c
===================================================================
--- gdb-7.4.50.20111218.orig/gdb/python/py-auto-load.c 2011-12-10 23:51:47.000000000 +0100
+++ gdb-7.4.50.20111218/gdb/python/py-auto-load.c 2011-12-19 00:25:26.080891950 +0100
@@ -284,7 +284,7 @@ source_section_scripts (struct objfile *
}
opened = find_and_open_script (file, 1 /*search_path*/,
- &stream, &full_path);
+ &stream, &full_path, 1 /* from_tty */);
/* If one script isn't found it's not uncommon for more to not be
found either. We don't want to print an error message for each
Index: gdb-7.4.50.20111218/gdb/cli/cli-cmds.h
===================================================================
--- gdb-7.4.50.20111218.orig/gdb/cli/cli-cmds.h 2011-11-01 15:51:23.000000000 +0100
+++ gdb-7.4.50.20111218/gdb/cli/cli-cmds.h 2011-12-19 00:25:26.080891950 +0100
@@ -129,7 +129,8 @@ extern void source_script (char *, int);
/* Exported to objfiles.c. */
extern int find_and_open_script (const char *file, int search_path,
- FILE **streamp, char **full_path);
+ FILE **streamp, char **full_path,
+ int from_tty);
/* Command tracing state. */
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