Original patch from gentoo: gentoo/src/patchsets/gdb/6.8/35_all_gdb-6.3-security-errata-20050610.patch
-= BEGIN original header =-
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.

-= END original header =-
diff -durN gdb-6.8.orig/gdb/Makefile.in gdb-6.8/gdb/Makefile.in
--- gdb-6.8.orig/gdb/Makefile.in	2008-03-17 13:15:08.000000000 +0100
+++ gdb-6.8/gdb/Makefile.in	2008-06-17 16:07:33.000000000 +0200
@@ -3004,7 +3004,7 @@
 	$(expression_h) $(frame_h) $(value_h) $(language_h) $(filenames_h) \
 	$(objfiles_h) $(source_h) $(disasm_h) $(ui_out_h) $(top_h) \
 	$(cli_decode_h) $(cli_script_h) $(cli_setshow_h) $(cli_cmds_h) \
-	$(tui_h)
+	$(tui_h) $(gdb_stat_h)
 	$(CC) -c $(INTERNAL_CFLAGS) $(srcdir)/cli/cli-cmds.c
 cli-decode.o: $(srcdir)/cli/cli-decode.c $(defs_h) $(symtab_h) \
 	$(gdb_regex_h) $(gdb_string_h) $(completer_h) $(ui_out_h) \
diff -durN gdb-6.8.orig/gdb/cli/cli-cmds.c gdb-6.8/gdb/cli/cli-cmds.c
--- gdb-6.8.orig/gdb/cli/cli-cmds.c	2008-01-01 23:53:14.000000000 +0100
+++ gdb-6.8/gdb/cli/cli-cmds.c	2008-06-17 16:07:33.000000000 +0200
@@ -36,6 +36,7 @@
 #include "objfiles.h"
 #include "source.h"
 #include "disasm.h"
+#include "gdb_stat.h"
 
 #include "ui-out.h"
 
@@ -459,12 +460,31 @@
 
   if (fd == -1)
     {
-      if (from_tty)
+      if (from_tty > 0)
 	perror_with_name (file);
       else
 	return;
     }
 
+#ifdef HAVE_GETUID
+  if (from_tty == -1)
+    {
+      struct stat statbuf;
+      if (fstat (fd, &statbuf) < 0)
+	{
+	  perror_with_name (file);
+	  close (fd);
+	  return;
+	}
+      if (statbuf.st_uid != getuid () || (statbuf.st_mode & S_IWOTH))
+	{
+          warning (_("not using untrusted file \"%s\""), file);
+	  close (fd);
+	  return;
+	}
+    }
+#endif
+
   stream = fdopen (fd, FOPEN_RT);
   script_from_file (stream, file);
 
diff -durN gdb-6.8.orig/gdb/main.c gdb-6.8/gdb/main.c
--- gdb-6.8.orig/gdb/main.c	2008-01-05 17:49:53.000000000 +0100
+++ gdb-6.8/gdb/main.c	2008-06-17 16:07:33.000000000 +0200
@@ -690,7 +690,7 @@
 
       if (!inhibit_gdbinit)
 	{
-	  catch_command_errors (source_script, homeinit, 0, RETURN_MASK_ALL);
+	  catch_command_errors (source_script, homeinit, -1, RETURN_MASK_ALL);
 	}
 
       /* Do stats; no need to do them elsewhere since we'll only
@@ -778,7 +778,7 @@
       || memcmp ((char *) &homebuf, (char *) &cwdbuf, sizeof (struct stat)))
     if (!inhibit_gdbinit)
       {
-	catch_command_errors (source_script, gdbinit, 0, RETURN_MASK_ALL);
+	catch_command_errors (source_script, gdbinit, -1, RETURN_MASK_ALL);
       }
 
   for (i = 0; i < ncmd; i++)
diff -durN gdb-6.8.orig/gdb/testsuite/gdb.base/gdbinit.exp gdb-6.8/gdb/testsuite/gdb.base/gdbinit.exp
--- gdb-6.8.orig/gdb/testsuite/gdb.base/gdbinit.exp	1970-01-01 01:00:00.000000000 +0100
+++ gdb-6.8/gdb/testsuite/gdb.base/gdbinit.exp	2008-06-17 16:07:33.000000000 +0200
@@ -0,0 +1,98 @@
+#   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>.
+
+if $tracelevel then {
+    strace $tracelevel
+}
+
+set prms_id 0
+set bug_id 0
+
+# 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"
diff -durN gdb-6.8.orig/gdb/testsuite/gdb.base/gdbinit.sample gdb-6.8/gdb/testsuite/gdb.base/gdbinit.sample
--- gdb-6.8.orig/gdb/testsuite/gdb.base/gdbinit.sample	1970-01-01 01:00:00.000000000 +0100
+++ gdb-6.8/gdb/testsuite/gdb.base/gdbinit.sample	2008-06-17 16:07:33.000000000 +0200
@@ -0,0 +1 @@
+echo "\nin gdbinit"