CVE-2018-20034 Denial of service in FlexNet Publisher

High 7.5 Published 21 Mar 2019 Updated 5 Aug 2024

Remote attackers can cause a denial of service in FlexNet Publisher by disrupting the heartbeat between lmgrd and the vendor daemon.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2018-20034?

CVE-2018-20034 is a high-severity denial of service vulnerability in Flexera Software LLC FlexNet Publisher, published on 21 Mar 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A Denial of Service vulnerability related to adding an item to a list in lmgrd and vendor daemon components of FlexNet Publisher version 11.16.1.0 and earlier allows a remote attacker to send a combination of messages to lmgrd or the vendor daemon, causing the heartbeat between lmgrd and the vendor daemon to stop, and the vendor daemon to shut down.

Which versions are affected by CVE-2018-20034?

It affects 2 products.

Products include Flexera Flexnet Publisher, Oracle Communications Lsms.

How do I fix CVE-2018-20034?

No fix has been published for CVE-2018-20034 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2018-20034 being exploited?

There is no known exploitation of CVE-2018-20034 in the wild and no public exploit code.

Sources

Also known as GHSA-fpjc-qw47-295v.