efax -x command line buffer overflow

efax-x-bo (7920) The risk level is classified as HighHigh Risk


efax is vulnerable to a buffer overflow, caused by improper bounds checking of the -x command line option. By sending the efex utility a string containing 1200 characters or more using the -x command line option, a local attacker could overflow a buffer and execute arbitrary commands on the system with elevated privileges.


Gain Privileges


No remedy available as of September 1, 2014.


Platforms Affected:

  • eFax efax 0.8a
  • eFax efax 0.9
  • eFax efax 0.9a


Jan 16, 2002

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