CVE-2018-7489

FasterXML jackson-databind before 2.7.9.3, 2.8.x before 2.8.11.1 and 2.9.x before 2.9.5 allows unauthenticated remote code execution because of an incomplete fix for the CVE-2017-7525 deserialization flaw. This is exploitable by sending maliciously crafted JSON input to the readValue method of the ObjectMapper, bypassing a blacklist that is ineffective if the c3p0 libraries are available in the classpath.

Mitigation

Advice on how to remain safe while using JAX-RS webservices on JBoss EAP 7.x is available here:

<https://access.redhat.com/solutions/3279231&gt;
<https://github.com/FasterXML/jackson-docs/wiki/JacksonPolymorphicDeserialization&gt;

General Mitigation:
Try to avoid

• Deserialization from sources you do not control
• enableDefaultTyping()
• @JsonTypeInfo using id.CLASSorid.MINIMAL_CLASS`