File CVE-2021-31292.patch of Package exiv2-0_26

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File CVE-2021-31292.patch of Package exiv2-0_26 (Revision 2249c2beb306078607e1e2b425c18ae6)

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From 9b7a19f957af53304655ed1efe32253a1b11a8d0 Mon Sep 17 00:00:00 2001
From: Kevin Backhouse <kevinbackhouse@github.com>
Date: Fri, 9 Apr 2021 13:37:48 +0100
Subject: [PATCH] Fix integer overflow.

---
 src/crwimage.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/crwimage.cpp b/src/crwimage.cpp
index ca79aa7..cd6200c 100644
--- a/src/crwimage.cpp
+++ b/src/crwimage.cpp
@@ -1326,7 +1326,11 @@ namespace Exiv2 {
                                                  pCrwMapping->crwDir_);
         if (edX != edEnd || edY != edEnd || edO != edEnd) {
             uint32_t size = 28;
-            if (cc && cc->size() > size) size = cc->size();
+            if (cc) {
+              if (cc->size() < size)
+                throw Error(kerCorruptedMetadata);
+              size = cc->size();
+            }
             DataBuf buf(size);
             std::memset(buf.pData_, 0x0, buf.size_);
             if (cc) std::memcpy(buf.pData_ + 8, cc->pData() + 8, cc->size() - 8);

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File CVE-2021-31292.patch of Package exiv2-0_26 (Revision 2249c2beb306078607e1e2b425c18ae6)

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