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import glib2-2.56.4-10.el8_4.1

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CentOS Sources 2021-08-10 08:03:13 -04:00 committed by Andrew Lukoshko
parent 5934bb6e61
commit 455c8008af
2 changed files with 135 additions and 1 deletions
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128
SOURCES/CVE-2021-27218.patch Normal file
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@ -0,0 +1,128 @@
From 89b522ed31837cb2ac107a8961fbb0f2c7fc7ccb Mon Sep 17 00:00:00 2001
From: Krzesimir Nowak <qdlacz@gmail.com>
Date: Wed, 10 Feb 2021 23:51:07 +0100
Subject: [PATCH] gbytearray: Do not accept too large byte arrays
GByteArray uses guint for storing the length of the byte array, but it
also has a constructor (g_byte_array_new_take) that takes length as a
gsize. gsize may be larger than guint (64 bits for gsize vs 32 bits
for guint). It is possible to call the function with a value greater
than G_MAXUINT, which will result in silent length truncation. This
may happen as a result of unreffing GBytes into GByteArray, so rather
be loud about it.
(Test case tweaked by Philip Withnall.)
---
glib/garray.c | 6 ++++++
glib/gbytes.c | 4 ++++
glib/tests/bytes.c | 37 +++++++++++++++++++++++++++++++++++--
3 files changed, 45 insertions(+), 2 deletions(-)
diff --git a/glib/garray.c b/glib/garray.c
index aa3c04707..271d85ad8 100644
--- a/glib/garray.c
+++ b/glib/garray.c
@@ -1666,6 +1666,10 @@ g_byte_array_new (void)
* Create byte array containing the data. The data will be owned by the array
* and will be freed with g_free(), i.e. it could be allocated using g_strdup().
*
+ * Do not use it if @len is greater than %G_MAXUINT. #GByteArray
+ * stores the length of its data in #guint, which may be shorter than
+ * #gsize.
+ *
* Since: 2.32
*
* Returns: (transfer full): a new #GByteArray
@@ -1677,6 +1681,8 @@ g_byte_array_new_take (guint8 *data,
GByteArray *array;
GRealArray *real;
+ g_return_val_if_fail (len <= G_MAXUINT, NULL);
+
array = g_byte_array_new ();
real = (GRealArray *)array;
g_assert (real->data == NULL);
diff --git a/glib/gbytes.c b/glib/gbytes.c
index 5141170d7..635b79535 100644
--- a/glib/gbytes.c
+++ b/glib/gbytes.c
@@ -512,6 +512,10 @@ g_bytes_unref_to_data (GBytes *bytes,
* g_bytes_new(), g_bytes_new_take() or g_byte_array_free_to_bytes(). In all
* other cases the data is copied.
*
+ * Do not use it if @bytes contains more than %G_MAXUINT
+ * bytes. #GByteArray stores the length of its data in #guint, which
+ * may be shorter than #gsize, that @bytes is using.
+ *
* Returns: (transfer full): a new mutable #GByteArray containing the same byte data
*
* Since: 2.32
diff --git a/glib/tests/bytes.c b/glib/tests/bytes.c
index 5ea5c2b35..42281307b 100644
--- a/glib/tests/bytes.c
+++ b/glib/tests/bytes.c
@@ -10,12 +10,12 @@
*/
#undef G_DISABLE_ASSERT
-#undef G_LOG_DOMAIN
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "glib.h"
+#include "glib/gstrfuncsprivate.h"
/* Keep in sync with glib/gbytes.c */
struct _GBytes
@@ -333,6 +333,38 @@ test_to_array_transferred (void)
g_byte_array_unref (array);
}
+static void
+test_to_array_transferred_oversize (void)
+{
+ g_test_message ("g_bytes_unref_to_array() can only take GBytes up to "
+ "G_MAXUINT in length; test that longer ones are rejected");
+
+ if (sizeof (guint) >= sizeof (gsize))
+ {
+ g_test_skip ("Skipping test as guint is not smaller than gsize");
+ }
+ else if (g_test_undefined ())
+ {
+ GByteArray *array = NULL;
+ GBytes *bytes = NULL;
+ gpointer data = g_memdup2 (NYAN, N_NYAN);
+ gsize len = ((gsize) G_MAXUINT) + 1;
+
+ bytes = g_bytes_new_take (data, len);
+ g_test_expect_message (G_LOG_DOMAIN, G_LOG_LEVEL_CRITICAL,
+ "g_byte_array_new_take: assertion 'len <= G_MAXUINT' failed");
+ array = g_bytes_unref_to_array (g_steal_pointer (&bytes));
+ g_test_assert_expected_messages ();
+ g_assert_null (array);
+
+ g_free (data);
+ }
+ else
+ {
+ g_test_skip ("Skipping test as testing undefined behaviour is disabled");
+ }
+}
+
static void
test_to_array_two_refs (void)
{
@@ -407,7 +439,8 @@ main (int argc, char *argv[])
g_test_add_func ("/bytes/to-data/transfered", test_to_data_transferred);
g_test_add_func ("/bytes/to-data/two-refs", test_to_data_two_refs);
g_test_add_func ("/bytes/to-data/non-malloc", test_to_data_non_malloc);
- g_test_add_func ("/bytes/to-array/transfered", test_to_array_transferred);
+ g_test_add_func ("/bytes/to-array/transferred", test_to_array_transferred);
+ g_test_add_func ("/bytes/to-array/transferred-oversize", test_to_array_transferred_oversize);
g_test_add_func ("/bytes/to-array/two-refs", test_to_array_two_refs);
g_test_add_func ("/bytes/to-array/non-malloc", test_to_array_non_malloc);
g_test_add_func ("/bytes/null", test_null);
--
2.31.1

8
SPECS/glib2.spec
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@ -5,7 +5,7 @@
Name: glib2
Version: 2.56.4
Release: 10%{?dist}
Release: 10%{?dist}.1
Summary: A library of handy utility functions
License: LGPLv2+
@ -73,6 +73,8 @@ Patch61: CVE-2019-13012.patch
# https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1927
# https://gitlab.gnome.org/GNOME/glib/-/merge_requests/2000
Patch70: CVE-2021-27219.patch
# https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1944
Patch71: CVE-2021-27218.patch
# https://bugzilla.redhat.com/show_bug.cgi?id=1948988
# https://gitlab.gnome.org/GNOME/glib/-/merge_requests/873
@ -277,6 +279,10 @@ glib-compile-schemas %{_datadir}/glib-2.0/schemas &> /dev/null || :
%{_datadir}/installed-tests
%changelog
* Mon Jul 26 2021 Michael Catanzaro <mcatanzaro@redhat.com> - 2.56.4-10.1
- Fix CVE-2021-27218
Resolves: #1974888
* Thu May 20 2021 Michael Catanzaro <mcatanzaro@redhat.com> - 2.56.4-10
- Fix various problems in GMainContext
Resolves: #1953553