ImageMagick/CVE-2023-34474-and-CVE-2023-34475.patch
wk333 62c158e42f Fix CVE-2023-34474 and CVE-2023-34475
(cherry picked from commit d84cb786f94463ab80ecb942f3506854c178f7de)
2023-06-29 16:40:33 +08:00

52 lines
2.1 KiB
Diff

From 1061db7f80fdc9ef572ac60b55f408f7bab6e1b0 Mon Sep 17 00:00:00 2001
From: Cristy <urban-warrior@imagemagick.org>
Date: Mon, 15 May 2023 14:22:11 -0400
Subject: [PATCH] carefully crafted image files (TIM2, JPEG) no longer overflow
buffer nor use heap after free (thanks to Juzhi Lu, Zhen Zhou, Likang Luo of
NSFOCUS Security Team)
Origin: https://github.com/ImageMagick/ImageMagick/commit/1061db7f80fdc9ef572ac60b55f408f7bab6e1b0
---
MagickCore/profile.c | 5 +++--
coders/tim2.c | 4 +++-
2 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/MagickCore/profile.c b/MagickCore/profile.c
index 57909092d2..382583a524 100644
--- a/MagickCore/profile.c
+++ b/MagickCore/profile.c
@@ -2458,11 +2458,12 @@ static void ReplaceXmpValue(StringInfo *profile,size_t start,size_t end,
if (new_length > length)
SetStringInfoLength(profile,new_length);
datum=(char *) GetStringInfoDatum(profile);
- memmove(datum+start+value_length,datum+end,length-end);
- memcpy(datum+start,value,value_length);
+ (void) memmove(datum+start+value_length,datum+end,length-end);
+ (void) memcpy(datum+start,value,value_length);
if (new_length < length)
{
SetStringInfoLength(profile,new_length);
+ datum=(char *) GetStringInfoDatum(profile);
*(datum+new_length)='\0';
}
}
diff --git a/coders/tim2.c b/coders/tim2.c
index 0445985dcc..d30afaf05d 100644
--- a/coders/tim2.c
+++ b/coders/tim2.c
@@ -517,10 +517,12 @@ static MagickBooleanType ReadTIM2ImageData(const ImageInfo *image_info,
/*
* ### Read CLUT Data ###
*/
- clut_data=(unsigned char *) AcquireQuantumMemory(1,header->clut_size);
+ clut_data=(unsigned char *) AcquireQuantumMemory(2,
+ MagickMax(header->clut_size,image->colors));
if (clut_data == (unsigned char *) NULL)
ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
image_info->filename);
+ (void) memset(clut_data,0,2*MagickMax(header->clut_size,image->colors));
count=ReadBlob(image,header->clut_size,clut_data);
if (count != (ssize_t) (header->clut_size))
{