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Comment by marcusb

7 months ago

Zip bombs are fun. I discovered a vulnerability in a security product once where it wouldn’t properly scan a file for malware if the file was or contained a zip archive greater than a certain size.

The practical effect of this was you could place a zip bomb in an office xml document and this product would pass the ooxml file through even if it contained easily identifiable malware.

Eh I got news for ya.

The file size problem is still an issue for many big name EDRs.

  • Undoubtedly. If you go poking around most any security product (the product I was referring to was not in the EDR space,) you'll see these sorts of issues all over the place.

    • It have to be the way it is.

      Scanning them are resources intensive. The choice are (1) skip scanning them; (2) treat them as malware; (3) scan them and be DoS'ed.

      (deferring the decision to human iss effectively DoS'ing your IT support team)

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