
Research
Malicious fezbox npm Package Steals Browser Passwords from Cookies via Innovative QR Code Steganographic Technique
A malicious package uses a QR code as steganography in an innovative technique.
BinaryStruct is a class for dealing with binary structured data. It simplifies expressing what the binary structure looks like, with the ability to name the parts. Given this definition, it is easy to encode/decode the binary structure from/to a Hash.
As an example, we will show reading and writing a .gif header. This example is also in spec/gif_spec.rb.
gif_header = BinaryStruct.new([
"a3", :magic,
"a3", :version,
"S", :width,
"S", :height,
"a", :flags,
"C", :bg_color_index,
"C", :pixel_aspect_ratio
])
header_size = gif_header.size
header = File.open("test.gif", "rb") { |f| f.read(header_size) }
gif_header.decode(header)
=> {
:magic => "GIF",
:version => "89a",
:width => 16,
:height => 16,
:flags => "\x80",
:bg_color_index => 0,
:pixel_aspect_ratio => 0
}
header = gif_header.encode({
:magic => "GIF",
:version => "89a",
:width => 16,
:height => 16,
:flags => "\x80",
:bg_color_index => 0,
:pixel_aspect_ratio => 0
})
File.open("test.gif", "wb") { |f| f.write(header) }
=> "GIF89a\x10\x00\x10\x00\x80\x00\x00"
BinaryStruct supports bit formats and nibble formats, however note that the underlying Ruby methods, pack and unpack, support less than 8 bits by reading an entire byte, even if all of the bits are not used.
For example,
s = "\xFF\x00" # binary: 1111111100000000
s.unpack("b8b8") # => ["11111111", "00000000"]
s.unpack("b4b4b4b4") # => ["1111", "0000", "", ""]
One might expect that the latter would read 4 bits, then the next 4 bits, etc,
yielding ["1111", "1111", "0000", "0000"]
, but that is not the case. Instead,
the first b4 reads a full byte's worth, then discards the unused 4 bits, and the
same happens for the next b4. The third and fourth b4 have nothing left to read,
and so just return empty strings.
Add this line to your application's Gemfile:
gem 'binary_struct'
And then execute:
$ bundle
Or install it yourself as:
$ gem install binary_struct
git checkout -b my-new-feature
)git commit -am 'Add some feature'
)git push origin my-new-feature
)FAQs
Unknown package
We found that binary_struct demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 2 open source maintainers collaborating on the project.
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
Research
A malicious package uses a QR code as steganography in an innovative technique.
Research
/Security News
Socket identified 80 fake candidates targeting engineering roles, including suspected North Korean operators, exposing the new reality of hiring as a security function.
Application Security
/Research
/Security News
Socket detected multiple compromised CrowdStrike npm packages, continuing the "Shai-Hulud" supply chain attack that has now impacted nearly 500 packages.