CVE-2020-11582 Other in n/a

High 8.8 Published 6 Apr 2020 Updated 4 Aug 2024

Local attackers can bypass network restrictions on the tncc.jar TCP server via DNS rebinding, potentially aiding exploitation of related vulnerabilities.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2020-11582?

CVE-2020-11582 is a high-severity vulnerability in Pulsesecure Pulse Connect Secure, published on 6 Apr 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.)

Weakness: CWE-668

Which versions are affected by CVE-2020-11582?

It affects 2 products.

Products include Pulsesecure Pulse Connect Secure, Pulsesecure Pulse Policy Secure.

How do I fix CVE-2020-11582?

No fix has been published for CVE-2020-11582 yet. Limit exposure of the affected software until one is available.

Is CVE-2020-11582 being exploited?

There is no known exploitation of CVE-2020-11582 in the wild and no public exploit code.

All Pulsesecure Pulse Connect Secure vulnerabilities

Sources

Also known as GHSA-7mjm-6675-w446.