CVE-2019-11777 Improper Handling of Exceptional Conditions and Origin Validation Error in Eclipse Paho Java client library
Attackers can impersonate MQTT servers by bypassing TLS hostname verification, leading to data interception or injection.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2019-11777?
CVE-2019-11777 is a high-severity vulnerability in The Eclipse Foundation Eclipse Paho, published on 11 Sep 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In the Eclipse Paho Java client library version 1.2.0, when connecting to an MQTT server using TLS and setting a host name verifier, the result of that verification is not checked. This could allow one MQTT server to impersonate another and provide the client library with incorrect information.
Which versions are affected by CVE-2019-11777?
2 open source packages ship an affected version, including org.eclipse.paho:org.eclipse.paho.client.mqttv3. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.eclipse.paho:org.eclipse.paho.client.mqttv3 Maven | All versions | 1.2.1 |
org.eclipse.paho:org.eclipse.paho.client.mqttv3 Maven | All versions | 1.2.1 |
Products include Eclipse Paho Java Client.
How do I fix CVE-2019-11777?
Upgrade org.eclipse.paho:org.eclipse.paho.client.mqttv3 to 1.2.1 or later.
Is CVE-2019-11777 being exploited?
There is no known exploitation of CVE-2019-11777 in the wild and no public exploit code.
Sources
Also known as GHSA-63qc-p2x4-9fgf.