cvs commit: src/sbin/dhclient dhclient.c

[Brooks Davis]

brooks      2005-08-30 18:20:47 UTC

  FreeBSD src repository

  Modified files:
    sbin/dhclient        dhclient.c 
  Log:
  Introduce a new helper function check_search() derived for res_hnok to
  check the domain-name parameter according to the rules for "search"
  strings as documented in resolv.conf(5).  Specifically, the string must
  be no more than 256 bytes long and contain no more than six valid domain
  names separated by white space.
  
  The previous unchecked values could result in a mangled resolv.conf
  file which could effectively deny access to local sites.  This is not
  a security issue as rogue dhcp servers could already do this without
  sending invalid strings.
  
  Reviewed by:    cperciva
  MFC After:      3 days
  
  Revision  Changes    Path
  1.10      +56 -0     src/sbin/dhclient/dhclient.c