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-rw-r--r--source/l/glib2/glib-CVE-2008-4316.diff62
1 files changed, 62 insertions, 0 deletions
diff --git a/source/l/glib2/glib-CVE-2008-4316.diff b/source/l/glib2/glib-CVE-2008-4316.diff
new file mode 100644
index 00000000..5d9bddee
--- /dev/null
+++ b/source/l/glib2/glib-CVE-2008-4316.diff
@@ -0,0 +1,62 @@
+--- trunk/glib/gbase64.c 2009/02/23 04:30:06 7897
++++ trunk/glib/gbase64.c 2009/03/12 13:30:55 7973
+@@ -54,8 +54,9 @@
+ *
+ * The output buffer must be large enough to fit all the data that will
+ * be written to it. Due to the way base64 encodes you will need
+- * at least: @len * 4 / 3 + 6 bytes. If you enable line-breaking you will
+- * need at least: @len * 4 / 3 + @len * 4 / (3 * 72) + 7 bytes.
++ * at least: (@len / 3 + 1) * 4 + 4 bytes (+ 4 may be needed in case of
++ * non-zero state). If you enable line-breaking you will need at least:
++ * ((@len / 3 + 1) * 4 + 4) / 72 + 1 bytes of extra space.
+ *
+ * @break_lines is typically used when putting base64-encoded data in emails.
+ * It breaks the lines at 72 columns instead of putting all of the text on
+@@ -233,8 +234,14 @@
+ g_return_val_if_fail (data != NULL, NULL);
+ g_return_val_if_fail (len > 0, NULL);
+
+- /* We can use a smaller limit here, since we know the saved state is 0 */
+- out = g_malloc (len * 4 / 3 + 4);
++ /* We can use a smaller limit here, since we know the saved state is 0,
++ +1 is needed for trailing \0, also check for unlikely integer overflow */
++ if (len >= ((G_MAXSIZE - 1) / 4 - 1) * 3)
++ g_error("%s: input too large for Base64 encoding (%"G_GSIZE_FORMAT" chars)",
++ G_STRLOC, len);
++
++ out = g_malloc ((len / 3 + 1) * 4 + 1);
++
+ outlen = g_base64_encode_step (data, len, FALSE, out, &state, &save);
+ outlen += g_base64_encode_close (FALSE, out + outlen, &state, &save);
+ out[outlen] = '\0';
+@@ -275,7 +282,8 @@
+ *
+ * The output buffer must be large enough to fit all the data that will
+ * be written to it. Since base64 encodes 3 bytes in 4 chars you need
+- * at least: @len * 3 / 4 bytes.
++ * at least: (@len / 4) * 3 + 3 bytes (+ 3 may be needed in case of non-zero
++ * state).
+ *
+ * Return value: The number of bytes of output that was written
+ *
+@@ -358,7 +366,8 @@
+ gsize *out_len)
+ {
+ guchar *ret;
+- gint input_length, state = 0;
++ gsize input_length;
++ gint state = 0;
+ guint save = 0;
+
+ g_return_val_if_fail (text != NULL, NULL);
+@@ -368,7 +377,9 @@
+
+ g_return_val_if_fail (input_length > 1, NULL);
+
+- ret = g_malloc0 (input_length * 3 / 4);
++ /* We can use a smaller limit here, since we know the saved state is 0,
++ +1 used to avoid calling g_malloc0(0), and hence retruning NULL */
++ ret = g_malloc0 ((input_length / 4) * 3 + 1);
+
+ *out_len = g_base64_decode_step (text, input_length, ret, &state, &save);
+