Security surprises on Firefox Quantum
This morning I’ve found an scaring surprise on my Firefox Quantum. Casually it was connected to a proxy when an unexpected connection came up, the browser  was connecting to an unknown remote site via HTTP and downloading a ZIP that contains an ELF shared library, without any type of signature on it.

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This means two things

1) the owner of that site might spread malware infecting many many people.
2) the ISP also might do that.

Ubuntu Version:

Firefox Quantum version:

The URL: hxxp://ciscobinary.openh264.org/openh264-linux64-0410d336bb748149a4f560eb6108090f078254b1.zip

The zip contains these two files:
  3f201a8984d6d765bc81966842294611  libgmpopenh264.so
  44aef3cd6b755fa5f6968725b67fd3b8  gmpopenh264.info

The info file:
  Name: gmpopenh264
  Description: GMP Plugin for OpenH264.
  Version: 1.6.0
  APIs: encode-video[h264], decode-video[h264]

So there is a remote codec loading system that is unsigned and unencrypted, I think is good to be aware of it.

In this case the shared library is a video decoder, but it would be a vector to distribute malware o spyware massively, or an attack vector for a MITM attacker.

By admin