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From 898e3a8c8c0314d2e6b106809a8e3e93cf9d4394 Mon Sep 17 00:00:00 2001
From: Ignacio Casal Quinteiro
Date: Sun, 16 Apr 2017 13:13:43 +0200
Subject: [PATCH 1/3] input: check end of input before reading a byte
When reading bytes we weren't check that the index wasn't
out of bound and this could produce an invalid read which
could deal to a security bug.
---
leio: Snipped cosmetic chunks
diff --git a/src/cr-input.c b/src/cr-input.c
index 49000b1..3b63a88 100644
--- a/src/cr-input.c
+++ b/src/cr-input.c
@@ -404,6 +404,8 @@ cr_input_get_nb_bytes_left (CRInput const * a_this)
enum CRStatus
cr_input_read_byte (CRInput * a_this, guchar * a_byte)
{
+ gulong nb_bytes_left = 0;
+
g_return_val_if_fail (a_this && PRIVATE (a_this)
&& a_byte, CR_BAD_PARAM_ERROR);
@@ -413,6 +415,12 @@ cr_input_read_byte (CRInput * a_this, guchar * a_byte)
if (PRIVATE (a_this)->end_of_input == TRUE)
return CR_END_OF_INPUT_ERROR;
+ nb_bytes_left = cr_input_get_nb_bytes_left (a_this);
+
+ if (nb_bytes_left < 1) {
+ return CR_END_OF_INPUT_ERROR;
+ }
+
*a_byte = PRIVATE (a_this)->in_buf[PRIVATE (a_this)->next_byte_index];
if (PRIVATE (a_this)->nb_bytes -
--
2.10.1
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