An issue was discovered in Pulse Secure Pulse Connect Secure (PCS) through 2020-04-06. The applet in tncc.jar, executed on macOS, Linux, and Solaris clients when a Host Checker policy is enforced, allows a man-in-the-middle attacker to perform OS command injection attacks (against a client) via shell metacharacters to the doCustomRemediateInstructions method, because Runtime.getRuntime().exec() is used.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-11581
Reference (s):
- https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44426
- https://git.lsd.cat/g/pulse-host-checker-rce