Add /usr/sbin and /sbin to default root PATH When dropbear is used in a very restricted environment (such as in a initrd), the default user shell is often also very restricted and doesn't take care of setting the PATH so the user ends up with the PATH set by dropbear. Unfortunately, dropbear always sets "/usr/bin:/bin" as default PATH even for the root user which should have /usr/sbin and /sbin too. For a concrete instance of this problem, see the "Remote Unlocking" section in this tutorial: https://paxswill.com/blog/2013/11/04/encrypted-raspberry-pi/ It speaks of a bug in the initramfs script because it's written "blkid" instead of "/sbin/blkid"... this is just because the scripts from the initramfs do not expect to have a PATH without the sbin directories and because dropbear is not setting the PATH appropriately for the root user. I'm thus suggesting to use the attached patch to fix this misbehaviour (I did not test it, but it's easy enough). It might seem anecdotic but multiple Kali users have been bitten by this. From https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=903403

/* test pmac/omac/hmac */
#include <tomcrypt_test.h>

int mac_test(void)
{
#ifdef LTC_HMAC
   DO(hmac_test()); 
#endif
#ifdef LTC_PMAC
   DO(pmac_test()); 
#endif
#ifdef LTC_OMAC
   DO(omac_test()); 
#endif
#ifdef LTC_XCBC
   DO(xcbc_test());
#endif
#ifdef LTC_F9_MODE
   DO(f9_test());
#endif
#ifdef LTC_EAX_MODE
   DO(eax_test());  
#endif
#ifdef LTC_OCB_MODE
   DO(ocb_test());  
#endif
#ifdef LTC_CCM_MODE
   DO(ccm_test());
#endif
#ifdef LTC_GCM_MODE
   DO(gcm_test());
#endif
#ifdef LTC_PELICAN
   DO(pelican_test());
#endif
   return 0;
}

/* $Source$ */
/* $Revision$ */
/* $Date$ */