ArchLinux: 202012-20: lib32-gdk-pixbuf2: denial of service
Summary
A security issue was found in gdk-pixbuf2 2.40.0 up to 2.42.0. A malformed GIF image could lead to an endless loop in the write_indexes function in gdk-pixbuf/lzw.c, taking full CPU resources and leading to a denial of service.
Resolution
Upgrade to 2.42.2-1.
# pacman -Syu "lib32-gdk-pixbuf2>=2.42.2-1"
The problem has been fixed upstream in version 2.42.2.
References
https://mail.gnome.org/archives/distributor-list/2020-December/msg00000.html https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/issues/164 https://gitlab.gnome.org/GNOME/gdk-pixbuf/uploads/2838c96bb111a93d845b95c53b8953e3/gif_lzw_PoC.tar.gz https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/merge_requests/92 https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/commit/bdd3acbd48a575d418ba6bf1b32d7bda2fae1c81 https://security.archlinux.org/CVE-2020-29385
Workaround
None.