CVE-2020-11582 Information

Description

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 launches a TCP server that accepts local connections on a random port. This can be reached by local HTTP clients because up to 25 invalid lines are ignored and because DNS rebinding can occur. (This server accepts for example a setcookie command that might be relevant to CVE-2020-11581 exploitation.)

CVSS Vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

https://git.lsd.cat/g/pulse-host-checker-rce https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44426

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8