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False negatives: 7.2.1C reports 'No threats detected' for fusefs volumes mounted using MacFUSE

Screenshots at http://www.wuala.com/grahamperrin/public/2010/11/03/d

  • shots 001 and 002 show false negatives. 
  • shot 003 shows on-access detection of EICAR-AV-Test
  • shot 004 shows Quarantine Manager empty moments after the detection. 

The problem here is probably a Sophos process run as root.

References

http://en.wikipedia.org/wiki/Filesystem_in_Userspace

http://code.google.com/p/macfuse/wiki/FAQ in particular the default, 

> superuser is denied access

:1000102


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