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Add patch(gd-2.2.5-null-pointer.patch) - fix Null pointer reference in gdImageClone (gdImagePtr src)

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Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1599032
This commit is contained in:
Filip Januš 2020-01-31 09:31:42 +01:00
parent 1f04fea86e
commit d7d041cd25
2 changed files with 82 additions and 1 deletions
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74
gd-2.2.5-null-pointer.patch Normal file
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@ -0,0 +1,74 @@
From a93eac0e843148dc2d631c3ba80af17e9c8c860f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?F=C3=A1bio=20Cabral=20Pacheco?= <fcabralpacheco@gmail.com>
Date: Fri, 20 Dec 2019 12:03:33 -0300
Subject: [PATCH] Fix potential NULL pointer dereference in gdImageClone()
---
src/gd.c | 9 +--------
tests/gdimageclone/style.c | 30 ++++++++++++++++++++++++++++++
5 files changed, 35 insertions(+), 9 deletions(-)
create mode 100644 tests/gdimageclone/style.c
diff --git a/src/gd.c b/src/gd.c
index 592a0286..d564d1f9 100644
--- a/src/gd.c
+++ b/src/gd.c
@@ -2865,14 +2865,6 @@ BGD_DECLARE(gdImagePtr) gdImageClone (gdImagePtr src) {
}
}
- if (src->styleLength > 0) {
- dst->styleLength = src->styleLength;
- dst->stylePos = src->stylePos;
- for (i = 0; i < src->styleLength; i++) {
- dst->style[i] = src->style[i];
- }
- }
-
dst->interlace = src->interlace;
dst->alphaBlendingFlag = src->alphaBlendingFlag;
@@ -2907,6 +2899,7 @@ BGD_DECLARE(gdImagePtr) gdImageClone (gdImagePtr src) {
if (src->style) {
gdImageSetStyle(dst, src->style, src->styleLength);
+ dst->stylePos = src->stylePos;
}
for (i = 0; i < gdMaxColors; i++) {
diff --git a/tests/gdimageclone/style.c b/tests/gdimageclone/style.c
new file mode 100644
index 00000000..c2b246ed
--- /dev/null
+++ b/tests/gdimageclone/style.c
@@ -0,0 +1,30 @@
+/**
+ * Cloning an image should exactly reproduce all style related data
+ */
+
+
+#include <string.h>
+#include "gd.h"
+#include "gdtest.h"
+
+
+int main()
+{
+ gdImagePtr im, clone;
+ int style[] = {0, 0, 0};
+
+ im = gdImageCreate(8, 8);
+ gdImageSetStyle(im, style, sizeof(style)/sizeof(style[0]));
+
+ clone = gdImageClone(im);
+ gdTestAssert(clone != NULL);
+
+ gdTestAssert(clone->styleLength == im->styleLength);
+ gdTestAssert(clone->stylePos == im->stylePos);
+ gdTestAssert(!memcmp(clone->style, im->style, sizeof(style)/sizeof(style[0])));
+
+ gdImageDestroy(clone);
+ gdImageDestroy(im);
+
+ return gdNumFailures();
+}

9
gd.spec
View File

@ -9,7 +9,7 @@
Summary: A graphics library for quick creation of PNG or JPEG images
Name: gd
Version: 2.2.5
Release: 11%{?prever}%{?short}%{?dist}
Release: 12%{?prever}%{?short}%{?dist}
License: MIT
URL: http://libgd.github.io/
%if 0%{?commit:1}
@ -29,6 +29,8 @@ Patch3: gd-2.2.5-gdImageBmpPtr-double-free.patch
Patch4: gd-2.2.5-heap-based-buffer-overflow.patch
# CVE-2019-6978
Patch5: gd-2.2.5-potential-double-free.patch
# NULL POINTER REFERENCE - https://github.com/libgd/libgd/commit/a93eac0e843148dc2d631c3ba80af17e9c8c860f
Patch6: gd-2.2.5-null-pointer.patch
BuildRequires: freetype-devel
BuildRequires: fontconfig-devel
@ -96,6 +98,7 @@ files for gd, a graphics library for creating PNG and JPEG graphics.
%patch3 -p1 -b .gdImageBmpPtr-free
%patch4 -p1
%patch5 -p1
%patch6 -p1
: $(perl config/getver.pl)
@ -167,6 +170,10 @@ grep %{version} $RPM_BUILD_ROOT%{_libdir}/pkgconfig/gdlib.pc
%changelog
* Fri Jan 31 2020 Filip Januš <fjanus@redhat.com> - 2.2.5-12
- Add patch(gd-2.2.5-null-pointer.patch) - fix Null pointer reference in gdImageClone (gdImagePtr src)
- Resolves: #1599032
* Tue Jan 28 2020 Fedora Release Engineering <releng@fedoraproject.org> - 2.2.5-11
- Rebuilt for https://fedoraproject.org/wiki/Fedora_32_Mass_Rebuild