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CVE-2017-7643

Status Candidate

Overview

Proxifier for Mac before 2.19 allows local users to gain privileges via the first parameter to the KLoader setuid program.

Related Files

Proxifier 2.19 Privilege Escalation / Code Execution
Posted Apr 12, 2017
Authored by Mark Wadham

Proxifier version 2.19 introduced a kext signature verification to the KLoader binary as a fix for CVE-2017-7643 but Proxifier.app performs no verification of the KLoader binary that gets executed as root.

tags | exploit, root
advisories | CVE-2017-7643
MD5 | 8283d1273a246d055aa147f0939a068d
Proxifier 2.18 Privilege Escalation / Code Execution
Posted Apr 11, 2017
Authored by Mark Wadham

Proxifier versions 2.18 and below ships with a KLoader binary which it installs suid root the first time Proxifier is run. This binary serves a single purpose which is to load and unload Proxifier's kernel extension. Unfortunately it does this by taking the first parameter passed to it on the commandline without any sanitisation and feeding it straight into system().

tags | exploit, kernel, root
advisories | CVE-2017-7643
MD5 | 6303ce293523ba76e75217030e88c039
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