File CVE-2021-37618.patch of Package exiv2-0_26

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File CVE-2021-37618.patch of Package exiv2-0_26

From dbf472751fc8b87ea7d1de02f54eaf64233a2fb6 Mon Sep 17 00:00:00 2001
From: Kevin Backhouse <kevinbackhouse@github.com>
Date: Mon, 5 Jul 2021 10:40:03 +0100
Subject: [PATCH 2/2] Better bounds checking in Jp2Image::printStructure

---
 src/jp2image.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/jp2image.cpp b/src/jp2image.cpp
index 43c93d7..a8c37e8 100644
--- a/src/jp2image.cpp
+++ b/src/jp2image.cpp
@@ -42,6 +42,7 @@ EXIV2_RCSID("@(#) $Id$")
 #include "futils.hpp"
 #include "types.hpp"
 #include "safe_op.hpp"
+#include "enforce.hpp"

// + standard includes
 #include <string>
@@ -511,6 +512,7 @@ namespace Exiv2
                             if(subBox.type == kJp2BoxTypeColorHeader)
                             {
                                 long pad = 3 ; // don't know why there are 3 padding bytes
+                                enforce(data.size_ >= pad, kerCorruptedMetadata);
                                 if ( bPrint ) {
                                     out << " | pad:" ;
                                     for ( int i = 0 ; i < 3 ; i++ ) out<< " " << (int) data.pData_[i];
@@ -521,6 +523,7 @@ namespace Exiv2
                                 }

DataBuf icc(iccLength);
+                                enforce(iccLength <= data.size_ - pad, kerCorruptedMetadata);
                                 if ( bICC ) out.write((const char*)icc.pData_,icc.size_);
                             }
                             lf(out,bLF);

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File CVE-2021-37618.patch of Package exiv2-0_26

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