------------------------------------------------------------------------ Multiple local privilege escalation vulnerabilities in Proxifier for Mac ------------------------------------------------------------------------ Yorick Koster, April 2017 ------------------------------------------------------------------------ Abstract ------------------------------------------------------------------------ Multiple local privileges escalation vulnerabilities were found in the KLoader binary that ships with Proxifier. KLoader is responsible for loading a Kernel Extension (kext). KLoader is installed setuid root, it accepts one or two command line arguments that are used in a number of system commands. These arguments are used in an insecure manner allowing a local attacker to elevate its privileges. In addition, the environment is not properly sanitized, which also introduces an possibility to run arbitrary commands with elevated privileges. ------------------------------------------------------------------------ Tested versions ------------------------------------------------------------------------ These issues were successfully verified on Proxifier for Mac v2.18. ------------------------------------------------------------------------ Fix ------------------------------------------------------------------------ Proxifier v2.19 was released that addresses these issues. ------------------------------------------------------------------------ Details ------------------------------------------------------------------------ https://www.securify.nl/advisory/SFY20170401/multiple_local_privilege_escalation_vulnerabilities_in_proxifier_for_mac.html
