From c690ed5ad5e57628df1dbe67c9e95c74015c48b1 Mon Sep 17 00:00:00 2001 From: wangkerong Date: Thu, 25 Aug 2022 15:47:22 +0800 Subject: [PATCH] fix CVE-2021-46829 --- backport-CVE-2021-46829.patch | 61 +++++++++++++++++++++++++++++++++++ gdk-pixbuf2.spec | 7 +++- 2 files changed, 67 insertions(+), 1 deletion(-) create mode 100644 backport-CVE-2021-46829.patch diff --git a/backport-CVE-2021-46829.patch b/backport-CVE-2021-46829.patch new file mode 100644 index 0000000..76054ba --- /dev/null +++ b/backport-CVE-2021-46829.patch @@ -0,0 +1,61 @@ +From 6976bdc8ee9dd2c2954f91066f7b0f643769a379 Mon Sep 17 00:00:00 2001 +From: Robert Ancell +Date: Thu, 3 Jun 2021 11:05:56 +1200 +Subject: [PATCH] gif: Check for overflow when compositing or clearing frames. + +Fixes: #190 + +Similar to fix in 086e8adf4cc352cd11572f96066b001b545f354e +--- + gdk-pixbuf/io-gif-animation.c | 21 +++++++++++++-------- + 1 file changed, 13 insertions(+), 8 deletions(-) + +diff --git a/gdk-pixbuf/io-gif-animation.c b/gdk-pixbuf/io-gif-animation.c +index 8335cdd76..71d9265e6 100644 +--- a/gdk-pixbuf/io-gif-animation.c ++++ b/gdk-pixbuf/io-gif-animation.c +@@ -369,7 +369,7 @@ composite_frame (GdkPixbufGifAnim *anim, GdkPixbufFrame *frame) + for (i = 0; i < n_indexes; i++) { + guint8 index = index_buffer[i]; + guint x, y; +- int offset; ++ gsize offset; + + if (index == frame->transparent_index) + continue; +@@ -379,11 +379,13 @@ composite_frame (GdkPixbufGifAnim *anim, GdkPixbufFrame *frame) + if (x >= anim->width || y >= anim->height) + continue; + +- offset = y * gdk_pixbuf_get_rowstride (anim->last_frame_data) + x * 4; +- pixels[offset + 0] = frame->color_map[index * 3 + 0]; +- pixels[offset + 1] = frame->color_map[index * 3 + 1]; +- pixels[offset + 2] = frame->color_map[index * 3 + 2]; +- pixels[offset + 3] = 255; ++ if (g_size_checked_mul (&offset, gdk_pixbuf_get_rowstride (anim->last_frame_data), y) && ++ g_size_checked_add (&offset, offset, x * 4)) { ++ pixels[offset + 0] = frame->color_map[index * 3 + 0]; ++ pixels[offset + 1] = frame->color_map[index * 3 + 1]; ++ pixels[offset + 2] = frame->color_map[index * 3 + 2]; ++ pixels[offset + 3] = 255; ++ } + } + + out: +@@ -448,8 +450,11 @@ gdk_pixbuf_gif_anim_iter_get_pixbuf (GdkPixbufAnimationIter *anim_iter) + x_end = MIN (anim->last_frame->x_offset + anim->last_frame->width, anim->width); + y_end = MIN (anim->last_frame->y_offset + anim->last_frame->height, anim->height); + for (y = anim->last_frame->y_offset; y < y_end; y++) { +- guchar *line = pixels + y * gdk_pixbuf_get_rowstride (anim->last_frame_data) + anim->last_frame->x_offset * 4; +- memset (line, 0, (x_end - anim->last_frame->x_offset) * 4); ++ gsize offset; ++ if (g_size_checked_mul (&offset, gdk_pixbuf_get_rowstride (anim->last_frame_data), y) && ++ g_size_checked_add (&offset, offset, anim->last_frame->x_offset * 4)) { ++ memset (pixels + offset, 0, (x_end - anim->last_frame->x_offset) * 4); ++ } + } + break; + case GDK_PIXBUF_FRAME_REVERT: +-- +GitLab + diff --git a/gdk-pixbuf2.spec b/gdk-pixbuf2.spec index 3abcd59..fbf9cb1 100644 --- a/gdk-pixbuf2.spec +++ b/gdk-pixbuf2.spec @@ -2,12 +2,14 @@ Name: gdk-pixbuf2 Version: 2.42.6 -Release: 3 +Release: 4 Summary: gdk is a multi-platform toolkit for creating graphical user interfaces. License: LGPLv2+ URL: https://gitlab.gnome.org/GNOME/gdk-pixbuf Source0: https://download-fallback.gnome.org/sources/gdk-pixbuf/2.42/gdk-pixbuf-%{version}.tar.xz +Patch6000: backport-CVE-2021-46829.patch + BuildRequires: docbook-style-xsl BuildRequires: gettext BuildRequires: pkgconfig(gio-2.0) >= %{glib2_version} @@ -128,6 +130,9 @@ gdk-pixbuf-query-loaders-%{__isa_bits} --update-cache %{_mandir}/man1/gdk-pixbuf-csource.1* %changelog +* Thu Aug 25 2022 wangkerong - 2.42.6-4 +- fix CVE-2021-46829 + * Wed May 18 2022 loong_C - 2.42.6-3 - fix spec changelog date -- Gitee