Security update for keyboard input vulnerability.

- Fix security issue when reading username and password
  Related: CVE-2015-8370
- Do a better job of handling GRUB2_PASSWORD
  Related: rhbz#1284370

Signed-off-by: Peter Jones <pjones@redhat.com>

.gitignore

@@ -4,3 +4,6 @@ clog
 /unifont-5.1.20080820.pcf.gz
 /theme.tar.bz2
 /gitignore
+kojilogs
+/grub-*/
+.build*.log

0158-Fix-security-issue-when-reading-username-and-passwor.patch

@@ -0,0 +1,47 @@
+From eba919d27789fd0c8f085060672a122b61d3ebda Mon Sep 17 00:00:00 2001
+From: Hector Marco-Gisbert <hecmargi@upv.es>
+Date: Fri, 13 Nov 2015 16:21:09 +0100
+Subject: [PATCH] Fix security issue when reading username and password
+
+  This patch fixes two integer underflows at:
+    * grub-core/lib/crypto.c
+    * grub-core/normal/auth.c
+
+Resolves: CVE-2015-8370
+
+Signed-off-by: Hector Marco-Gisbert <hecmargi@upv.es>
+Signed-off-by: Ismael Ripoll-Ripoll <iripoll@disca.upv.es>
+---
+ grub-core/lib/crypto.c  | 2 +-
+ grub-core/normal/auth.c | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/grub-core/lib/crypto.c b/grub-core/lib/crypto.c
+index 8e8426c..a23519c 100644
+--- a/grub-core/lib/crypto.c
++++ b/grub-core/lib/crypto.c
+@@ -456,7 +456,7 @@ grub_password_get (char buf[], unsigned buf_size)
+ 	  break;
+ 	}
+ 
+-      if (key == '\b')
++      if (key == '\b' && cur_len)
+ 	{
+ 	  cur_len--;
+ 	  continue;
+diff --git a/grub-core/normal/auth.c b/grub-core/normal/auth.c
+index c6bd96e..5782ec5 100644
+--- a/grub-core/normal/auth.c
++++ b/grub-core/normal/auth.c
+@@ -172,7 +172,7 @@ grub_username_get (char buf[], unsigned buf_size)
+ 	  break;
+ 	}
+ 
+-      if (key == '\b')
++      if (key == '\b' && cur_len)
+ 	{
+ 	  cur_len--;
+ 	  grub_printf ("\b");
+-- 
+2.5.0
+

grub2.spec

@@ -47,7 +47,7 @@
 Name:           grub2
 Epoch:          1
 Version:        2.02
-Release:        0.17%{?dist}
+Release:        0.18%{?dist}
 Summary:        Bootloader with support for Linux, Multiboot and more
 
 Group:          System Environment/Base
@@ -217,6 +217,7 @@ Patch0154: 0154-Try-to-emit-linux16-initrd16-and-linuxefi-initrdefi-.patch
 Patch0155: 0001-Update-to-minilzo-2.08.patch
 Patch0156: 0001-Make-grub2-mkconfig-construct-titles-that-look-like-.patch
 Patch0157: 0002-Make-rescue-and-debug-entries-sort-right-again-in-gr.patch
+Patch0158: 0158-Fix-security-issue-when-reading-username-and-passwor.patch
 
 BuildRequires:  flex bison binutils python
 BuildRequires:  ncurses-devel xz-devel bzip2-devel
@@ -652,6 +653,12 @@ fi
 %{_datarootdir}/grub/themes/starfield
 
 %changelog
+* Thu Dec 10 2015 Peter Jones <pjones@redhat.com> - 2.02-0.18
+- Fix security issue when reading username and password
+  Related: CVE-2015-8370
+- Do a better job of handling GRUB2_PASSWORD
+  Related: rhbz#1284370
+
 * Fri Nov 20 2015 Peter Jones <pjones@redhat.com> - 2.02-0.17
 - Rebuild without multiboot* modules in the EFI image.
   Related: rhbz#1264103