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Accepting request 280133 from home:tiwai:branches:multimedia:libs

Browse Source 
- VUL-0: two buffer read overflows in sd2_parse_rsrc_fork()
  (CVE-2014-9496, bnc#911796): backported upstream fix patches
  sndfile-src-sd2.c-Fix-segfault-in-SD2-RSRC-parser.patch
  sndfile-src-sd2.c-Fix-two-potential-buffer-read-overflows.patch

OBS-URL: https://build.opensuse.org/request/show/280133
OBS-URL: https://build.opensuse.org/package/show/multimedia:libs/libsndfile?expand=0&rev=43
This commit is contained in:
Takashi Iwai 2015-01-07 10:21:55 +00:00 committed by Git OBS Bridge
parent 246267c8c3
commit 2596e519ff
5 changed files with 254 additions and 2 deletions
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2
libsndfile-progs.spec
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@ -1,7 +1,7 @@
#
# spec file for package libsndfile-progs
#
# Copyright (c) 2013 SUSE LINUX Products GmbH, Nuernberg, Germany.
# Copyright (c) 2015 SUSE LINUX Products GmbH, Nuernberg, Germany.
#
# All modifications and additions to the file contributed by third parties
# remain the property of their copyright owners, unless otherwise agreed

8
libsndfile.changes
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@ -1,3 +1,11 @@
-------------------------------------------------------------------
Wed Jan 7 08:30:31 CET 2015 - tiwai@suse.de
- VUL-0: two buffer read overflows in sd2_parse_rsrc_fork()
(CVE-2014-9496, bnc#911796): backported upstream fix patches
sndfile-src-sd2.c-Fix-segfault-in-SD2-RSRC-parser.patch
sndfile-src-sd2.c-Fix-two-potential-buffer-read-overflows.patch
-------------------------------------------------------------------
Mon Apr 15 13:57:35 UTC 2013 - mmeister@suse.com

8
libsndfile.spec
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@ -1,7 +1,7 @@
#
# spec file for package libsndfile
#
# Copyright (c) 2013 SUSE LINUX Products GmbH, Nuernberg, Germany.
# Copyright (c) 2015 SUSE LINUX Products GmbH, Nuernberg, Germany.
#
# All modifications and additions to the file contributed by third parties
# remain the property of their copyright owners, unless otherwise agreed
@ -46,6 +46,10 @@ Patch0: libsndfile-example-fix.diff
# PATCH-MISSING-TAG -- See http://en.opensuse.org/openSUSE:Packaging_Patches_guidelines
Patch1: libsndfile-paf-zero-division-fix.diff
Patch2: sndfile-ocloexec.patch
# PATCH-FIX-UPSTREAM CVE-2014-9496 bnc#911796
Patch3: sndfile-src-sd2.c-Fix-segfault-in-SD2-RSRC-parser.patch
# PATCH-FIX-UPSTREAM CVE-2014-9496 bnc#911796
Patch4: sndfile-src-sd2.c-Fix-two-potential-buffer-read-overflows.patch
BuildRoot: %{_tmppath}/%{name}-%{version}-build
%description
@ -89,6 +93,8 @@ libsndfile library.
%patch0
%patch1 -p1
%patch2
%patch3 -p1
%patch4 -p1
%build
%define warn_flags -W -Wall -Wstrict-prototypes -Wpointer-arith -Wno-unused-parameter

200
sndfile-src-sd2.c-Fix-segfault-in-SD2-RSRC-parser.patch Normal file
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@ -0,0 +1,200 @@
From 9341e9c6e70cd3ad76c901c3cf052d4cb52fd827 Mon Sep 17 00:00:00 2001
From: Erik de Castro Lopo <erikd@mega-nerd.com>
Date: Thu, 27 Jun 2013 18:04:03 +1000
Subject: [PATCH] src/sd2.c : Fix segfault in SD2 RSRC parser.
A specially crafted resource fork for an SD2 file can cause
the SD2 RSRC parser to read data from outside a dynamically
defined buffer. The data that is read is converted into a
short or int and used during further processing.
Since no write occurs, this is unlikely to be exploitable.
Bug reported by The Mayhem Team from Cylab, Carnegie Mellon
Univeristy. Paper is:
http://users.ece.cmu.edu/~arebert/papers/mayhem-oakland-12.pdf
---
src/sd2.c | 93 ++++++++++++++++++++++++++++++++++++--------------------------
1 file changed, 55 insertions(+), 38 deletions(-)
--- a/src/sd2.c
+++ b/src/sd2.c
@@ -1,5 +1,5 @@
/*
-** Copyright (C) 2001-2011 Erik de Castro Lopo <erikd@mega-nerd.com>
+** Copyright (C) 2001-2013 Erik de Castro Lopo <erikd@mega-nerd.com>
** Copyright (C) 2004 Paavo Jumppanen
**
** This program is free software; you can redistribute it and/or modify
@@ -370,44 +370,61 @@ sd2_write_rsrc_fork (SF_PRIVATE *psf, in
*/
static inline int
-read_char (const unsigned char * data, int offset)
-{ return data [offset] ;
-} /* read_char */
+read_rsrc_char (const SD2_RSRC *prsrc, int offset)
+{ const unsigned char * data = prsrc->rsrc_data ;
+ if (offset < 0 || offset >= prsrc->rsrc_len)
+ return 0 ;
+ return data [offset] ;
+} /* read_rsrc_char */
static inline int
-read_short (const unsigned char * data, int offset)
-{ return (data [offset] << 8) + data [offset + 1] ;
-} /* read_short */
+read_rsrc_short (const SD2_RSRC *prsrc, int offset)
+{ const unsigned char * data = prsrc->rsrc_data ;
+ if (offset < 0 || offset + 1 >= prsrc->rsrc_len)
+ return 0 ;
+ return (data [offset] << 8) + data [offset + 1] ;
+} /* read_rsrc_short */
static inline int
-read_int (const unsigned char * data, int offset)
-{ return (data [offset] << 24) + (data [offset + 1] << 16) + (data [offset + 2] << 8) + data [offset + 3] ;
-} /* read_int */
+read_rsrc_int (const SD2_RSRC *prsrc, int offset)
+{ const unsigned char * data = prsrc->rsrc_data ;
+ if (offset < 0 || offset + 3 >= prsrc->rsrc_len)
+ return 0 ;
+ return (data [offset] << 24) + (data [offset + 1] << 16) + (data [offset + 2] << 8) + data [offset + 3] ;
+} /* read_rsrc_int */
static inline int
-read_marker (const unsigned char * data, int offset)
-{
+read_rsrc_marker (const SD2_RSRC *prsrc, int offset)
+{ const unsigned char * data = prsrc->rsrc_data ;
+
+ if (offset < 0 || offset + 3 >= prsrc->rsrc_len)
+ return 0 ;
+
if (CPU_IS_BIG_ENDIAN)
return (data [offset] << 24) + (data [offset + 1] << 16) + (data [offset + 2] << 8) + data [offset + 3] ;
- else if (CPU_IS_LITTLE_ENDIAN)
+ if (CPU_IS_LITTLE_ENDIAN)
return data [offset] + (data [offset + 1] << 8) + (data [offset + 2] << 16) + (data [offset + 3] << 24) ;
- else
- return 0x666 ;
-} /* read_marker */
+
+ return 0 ;
+} /* read_rsrc_marker */
static void
-read_str (const unsigned char * data, int offset, char * buffer, int buffer_len)
-{ int k ;
+read_rsrc_str (const SD2_RSRC *prsrc, int offset, char * buffer, int buffer_len)
+{ const unsigned char * data = prsrc->rsrc_data ;
+ int k ;
memset (buffer, 0, buffer_len) ;
+ if (offset < 0 || offset + buffer_len >= prsrc->rsrc_len)
+ return ;
+
for (k = 0 ; k < buffer_len - 1 ; k++)
{ if (psf_isprint (data [offset + k]) == 0)
return ;
buffer [k] = data [offset + k] ;
} ;
return ;
-} /* read_str */
+} /* read_rsrc_str */
static int
sd2_parse_rsrc_fork (SF_PRIVATE *psf)
@@ -434,17 +451,17 @@ sd2_parse_rsrc_fork (SF_PRIVATE *psf)
/* Reset the header storage because we have changed to the rsrcdes. */
psf->headindex = psf->headend = rsrc.rsrc_len ;
- rsrc.data_offset = read_int (rsrc.rsrc_data, 0) ;
- rsrc.map_offset = read_int (rsrc.rsrc_data, 4) ;
- rsrc.data_length = read_int (rsrc.rsrc_data, 8) ;
- rsrc.map_length = read_int (rsrc.rsrc_data, 12) ;
+ rsrc.data_offset = read_rsrc_int (&rsrc, 0) ;
+ rsrc.map_offset = read_rsrc_int (&rsrc, 4) ;
+ rsrc.data_length = read_rsrc_int (&rsrc, 8) ;
+ rsrc.map_length = read_rsrc_int (&rsrc, 12) ;
if (rsrc.data_offset == 0x51607 && rsrc.map_offset == 0x20000)
{ psf_log_printf (psf, "Trying offset of 0x52 bytes.\n") ;
- rsrc.data_offset = read_int (rsrc.rsrc_data, 0x52 + 0) + 0x52 ;
- rsrc.map_offset = read_int (rsrc.rsrc_data, 0x52 + 4) + 0x52 ;
- rsrc.data_length = read_int (rsrc.rsrc_data, 0x52 + 8) ;
- rsrc.map_length = read_int (rsrc.rsrc_data, 0x52 + 12) ;
+ rsrc.data_offset = read_rsrc_int (&rsrc, 0x52 + 0) + 0x52 ;
+ rsrc.map_offset = read_rsrc_int (&rsrc, 0x52 + 4) + 0x52 ;
+ rsrc.data_length = read_rsrc_int (&rsrc, 0x52 + 8) ;
+ rsrc.map_length = read_rsrc_int (&rsrc, 0x52 + 12) ;
} ;
psf_log_printf (psf, " data offset : 0x%04X\n map offset : 0x%04X\n"
@@ -487,7 +504,7 @@ sd2_parse_rsrc_fork (SF_PRIVATE *psf)
goto parse_rsrc_fork_cleanup ;
} ;
- rsrc.string_offset = rsrc.map_offset + read_short (rsrc.rsrc_data, rsrc.map_offset + 26) ;
+ rsrc.string_offset = rsrc.map_offset + read_rsrc_short (&rsrc, rsrc.map_offset + 26) ;
if (rsrc.string_offset > rsrc.rsrc_len)
{ psf_log_printf (psf, "Bad string offset (%d).\n", rsrc.string_offset) ;
error = SFE_SD2_BAD_RSRC ;
@@ -496,7 +513,7 @@ sd2_parse_rsrc_fork (SF_PRIVATE *psf)
rsrc.type_offset = rsrc.map_offset + 30 ;
- rsrc.type_count = read_short (rsrc.rsrc_data, rsrc.map_offset + 28) + 1 ;
+ rsrc.type_count = read_rsrc_short (&rsrc, rsrc.map_offset + 28) + 1 ;
if (rsrc.type_count < 1)
{ psf_log_printf (psf, "Bad type count.\n") ;
error = SFE_SD2_BAD_RSRC ;
@@ -512,11 +529,11 @@ sd2_parse_rsrc_fork (SF_PRIVATE *psf)
rsrc.str_index = -1 ;
for (k = 0 ; k < rsrc.type_count ; k ++)
- { marker = read_marker (rsrc.rsrc_data, rsrc.type_offset + k * 8) ;
+ { marker = read_rsrc_marker (&rsrc, rsrc.type_offset + k * 8) ;
if (marker == STR_MARKER)
{ rsrc.str_index = k ;
- rsrc.str_count = read_short (rsrc.rsrc_data, rsrc.type_offset + k * 8 + 4) + 1 ;
+ rsrc.str_count = read_rsrc_short (&rsrc, rsrc.type_offset + k * 8 + 4) + 1 ;
error = parse_str_rsrc (psf, &rsrc) ;
goto parse_rsrc_fork_cleanup ;
} ;
@@ -548,26 +565,26 @@ parse_str_rsrc (SF_PRIVATE *psf, SD2_RSR
for (k = 0 ; data_offset + data_len < rsrc->rsrc_len ; k++)
{ int slen ;
- slen = read_char (rsrc->rsrc_data, str_offset) ;
- read_str (rsrc->rsrc_data, str_offset + 1, name, SF_MIN (SIGNED_SIZEOF (name), slen + 1)) ;
+ slen = read_rsrc_char (rsrc, str_offset) ;
+ read_rsrc_str (rsrc, str_offset + 1, name, SF_MIN (SIGNED_SIZEOF (name), slen + 1)) ;
str_offset += slen + 1 ;
- rsrc_id = read_short (rsrc->rsrc_data, rsrc->item_offset + k * 12) ;
+ rsrc_id = read_rsrc_short (rsrc, rsrc->item_offset + k * 12) ;
- data_offset = rsrc->data_offset + read_int (rsrc->rsrc_data, rsrc->item_offset + k * 12 + 4) ;
+ data_offset = rsrc->data_offset + read_rsrc_int (rsrc, rsrc->item_offset + k * 12 + 4) ;
if (data_offset < 0 || data_offset > rsrc->rsrc_len)
{ psf_log_printf (psf, "Exiting parser on data offset of %d.\n", data_offset) ;
break ;
} ;
- data_len = read_int (rsrc->rsrc_data, data_offset) ;
+ data_len = read_rsrc_int (rsrc, data_offset) ;
if (data_len < 0 || data_len > rsrc->rsrc_len)
{ psf_log_printf (psf, "Exiting parser on data length of %d.\n", data_len) ;
break ;
} ;
- slen = read_char (rsrc->rsrc_data, data_offset + 4) ;
- read_str (rsrc->rsrc_data, data_offset + 5, value, SF_MIN (SIGNED_SIZEOF (value), slen + 1)) ;
+ slen = read_rsrc_char (rsrc, data_offset + 4) ;
+ read_rsrc_str (rsrc, data_offset + 5, value, SF_MIN (SIGNED_SIZEOF (value), slen + 1)) ;
psf_log_printf (psf, " 0x%04x %4d %4d %3d '%s'\n", data_offset, rsrc_id, data_len, slen, value) ;

38
sndfile-src-sd2.c-Fix-two-potential-buffer-read-overflows.patch Normal file
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@ -0,0 +1,38 @@
From dbe14f00030af5d3577f4cabbf9861db59e9c378 Mon Sep 17 00:00:00 2001
From: Erik de Castro Lopo <erikd@mega-nerd.com>
Date: Thu, 25 Dec 2014 19:23:12 +1100
Subject: [PATCH] src/sd2.c : Fix two potential buffer read overflows.
Closes: https://github.com/erikd/libsndfile/issues/93
---
src/sd2.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
--- a/src/sd2.c
+++ b/src/sd2.c
@@ -513,6 +513,11 @@ sd2_parse_rsrc_fork (SF_PRIVATE *psf)
rsrc.type_offset = rsrc.map_offset + 30 ;
+ if (rsrc.map_offset + 28 > rsrc.rsrc_len)
+ { psf_log_printf (psf, "Bad map offset.\n") ;
+ goto parse_rsrc_fork_cleanup ;
+ } ;
+
rsrc.type_count = read_rsrc_short (&rsrc, rsrc.map_offset + 28) + 1 ;
if (rsrc.type_count < 1)
{ psf_log_printf (psf, "Bad type count.\n") ;
@@ -529,7 +534,12 @@ sd2_parse_rsrc_fork (SF_PRIVATE *psf)
rsrc.str_index = -1 ;
for (k = 0 ; k < rsrc.type_count ; k ++)
- { marker = read_rsrc_marker (&rsrc, rsrc.type_offset + k * 8) ;
+ { if (rsrc.type_offset + k * 8 > rsrc.rsrc_len)
+ { psf_log_printf (psf, "Bad rsrc marker.\n") ;
+ goto parse_rsrc_fork_cleanup ;
+ } ;
+
+ marker = read_rsrc_marker (&rsrc, rsrc.type_offset + k * 8) ;
if (marker == STR_MARKER)
{ rsrc.str_index = k ;