![Peter Korsgaard](/assets/img/avatar_default.png)
Fixes the following security vulnerablities: - CVE-2018-1000222: Libgd version 2.2.5 contains a Double Free Vulnerability vulnerability in gdImageBmpPtr Function that can result in Remote Code Execution . This attack appear to be exploitable via Specially Crafted Jpeg Image can trigger double free - CVE-2018-5711: gd_gif_in.c in the GD Graphics Library (aka libgd), as used in PHP before 5.6.33, 7.0.x before 7.0.27, 7.1.x before 7.1.13, and 7.2.x before 7.2.1, has an integer signedness error that leads to an infinite loop via a crafted GIF file, as demonstrated by a call to the imagecreatefromgif or imagecreatefromstring PHP function - CVE-2019-11038: When using the gdImageCreateFromXbm() function in the GD Graphics Library (aka LibGD) 2.2.5, as used in the PHP GD extension in PHP versions 7.1.x below 7.1.30, 7.2.x below 7.2.19 and 7.3.x below 7.3.6, it is possible to supply data that will cause the function to use the value of uninitialized variable. This may lead to disclosing contents of the stack that has been left there by previous code - CVE-2019-6978: The GD Graphics Library (aka LibGD) 2.2.5 has a double free in the gdImage*Ptr() functions in gd_gif_out.c, gd_jpeg.c, and gd_wbmp.c Signed-off-by: Peter Korsgaard <peter@korsgaard.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
62 lines
1.4 KiB
Diff
62 lines
1.4 KiB
Diff
From a11f47475e6443b7f32d21f2271f28f417e2ac04 Mon Sep 17 00:00:00 2001
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From: "Christoph M. Becker" <cmbecker69@gmx.de>
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Date: Wed, 29 Nov 2017 19:37:38 +0100
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Subject: [PATCH] Fix #420: Potential infinite loop in gdImageCreateFromGifCtx
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Due to a signedness confusion in `GetCode_` a corrupt GIF file can
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trigger an infinite loop. Furthermore we make sure that a GIF without
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any palette entries is treated as invalid *after* open palette entries
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have been removed.
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CVE-2018-5711
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See also https://bugs.php.net/bug.php?id=75571.
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[Peter: drop tests]
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Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
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---
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src/gd_gif_in.c | 12 ++++++------
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1 files changed, 38 insertions(+), 6 deletions(-)
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diff --git a/src/gd_gif_in.c b/src/gd_gif_in.c
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index daf26e7..0a8bd71 100644
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--- a/src/gd_gif_in.c
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+++ b/src/gd_gif_in.c
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@@ -335,11 +335,6 @@ terminated:
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return 0;
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}
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- if(!im->colorsTotal) {
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- gdImageDestroy(im);
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- return 0;
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- }
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-
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/* Check for open colors at the end, so
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* we can reduce colorsTotal and ultimately
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* BitsPerPixel */
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@@ -351,6 +346,11 @@ terminated:
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}
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}
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+ if(!im->colorsTotal) {
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+ gdImageDestroy(im);
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+ return 0;
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+ }
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+
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return im;
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}
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@@ -447,7 +447,7 @@ static int
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GetCode_(gdIOCtx *fd, CODE_STATIC_DATA *scd, int code_size, int flag, int *ZeroDataBlockP)
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{
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int i, j, ret;
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- unsigned char count;
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+ int count;
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if(flag) {
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scd->curbit = 0;
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--
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2.20.1
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